Indonesia Conference Directory

Corresponding Author
Budijanto Widjaja

Institutions
Parahyangan Catholic University

Abstract
Geotextile is one of geosynthetics constructed on an embankment functioning as its reinforcement to support tension force from the loading design, so the embankment will show less failure potential. Referring to the Federal Highway Administration standard, geotextiles designed under static and dynamic loading on a 7.5 m tall earth wall at Pondok Hijau, Bandung. The reinforced earth wall is further known as a Mechanically Stabilized Earth Wall. The FHWA design calculation uses the simplified coherent gravity method while the final analysis is based on limit equilibrium and finite element methods. The FHWA calculation produces preliminary design as follows: a 6.5 m long geotextile with 200kN/m ultimate tensile strength is placed at every 30 cm at the first layer, 50 cm from the second to the seventh layer, and 30 cm from the eighth to the twenty first layer. As the result, the maximum horizontal deformations of geotextile due to static and dynamic loading are 2.94 cm and 4.6 cm respectively. The wall itself also deforms as much as 5.07 cm due to static loading and 7.93 cm due to dynamic loading. For the record, the allowable deformation of geotextile and the wall are 27.3 cm and 10 cm respectively. Hence, the preliminary design is valid according to the deformation requirements.

Keywords
geotextile, Federal Highway Administration, Mechanically Stabilized Earth Wall, stability, deformation

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/FQVbDqwGHaCj

Corresponding Author
Ani Hairani

Institutions
1 Doctoral Program, Department of Civil and Environmental Engineering, Universitas Gadjah Mada
2 Department of Civil and Environmental Engineering, Universitas Gadjah Mada
3 Department of Civil Engineering, Universitas Muhammadiyah Yogyakarta

Abstract
Rainfall parameter has been widely used as early warning criterion for sediment disaster. It is also used as the threshold in Mount Merapi, Central Java Province, Indonesia for mitigating lahar which is frequently induced by high rainfall intensity. The rainfall threshold called critical line was developed by correlation of two rainfall indices, namely short term rainfall index and long term rainfall index. Several methods for identifying those two rainfall indices was proposed by previous researchers. This research is aimed to compare the implementation of different rainfall indices by the means of distributed rainfall runoff model. Rainfall runoff model is capable to perform the relationship between rainfall and runoff considering the heterogeneity of a basin and estimate temporal distribution of flow depth and discharge. Based on the results, short term rainfall index and long term rainfall index represented by effective rainfall with 6 hours half-life and 1.5 hours half-life, respectively seemed to have better correlation to simulation results. From this research, it can be concluded that comprehensivee analysis to determine the best rainfall index can be achieved by the utilization of distributed rainfall runoff model.

Keywords
Critical line, Lahar, Early Warning System, Rainfall Runoff Model

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/KnQxCq963EZ4

Corresponding Author
Kurnia Aprilliany

Institutions
(a) Student of Building Engineering of Education FKIP UNS
Universitas Sebelas Maret, Indonesian
(b) Lecturer of Building Engineering of Education FKIP UNS
Universitas Sebelas Maret, Indonesian

Abstract
The practice facilities in vocational high school must follow technological advancements in order to support targeted competencies. The objectives of this study are to identify the suitability of woodworking workshop-s area size based on National Education-s Ministry-s regulation (Permendiknas) No.40/2008, to review tools and furnishing layout in the machinery woodworking workshop related to systematic practice workflow, and to discover user-s comfort in terms of the existing woodworking workshop design. The study belongs to qualitative research. The obtained data were primary data and secondary data by snowball sampling as the sampling technique. Meanwhile, the data collection methods used interviews, observation, and document study. The data analysed technique employed interactive analysis model using these steps: collecting data, reducing data, presenting data, and drawing conclusions or verification. The results of the study indicated that (1) the area of woodworking workshop were not yet the standards of Permendiknas No.40/2008, (2) the layout of tools and furnishing did not fulfill the appropriateness of practice workflow (3) the design of room and tools/furnishing layout did not provide the comfort yet for its users, but the comfort has been obtained from the work table height toward machine.

Keywords
woodworking workshop, comfort, size, practice workflow

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/PQHnaFuRWCLx

Corresponding Author
Dwitya Okky Azanna

Institutions
a) Departement of Civil and Environmental Engineering, Engineering Faculty, Universitas Gadjah Mada, Yogyakarta, INDONESIA
* d.okky[at]mail.ugm.ac.id
** ahmad.rifai[at]ugm.ac.id

Abstract
The Ratu Boko site is the one of historical placed that has been used as a spot tourism in Yogyakarta. The location of the Ratu Boko Site which is has a steeply hills area and the additional loads of the Andrawina Plaza development can trigger a landslide. This objectives in this research to analyze the slope stability of Ratu Boko site in conditions before and after the development of Andrawina Plaza. The analysis was carried out using the 3D numerical simulation with limit equilibrium method on static and dynamic conditions. Besides the safety factor, the analysis results provide to show the location and shape of potential slip surface. Under dynamic load, based on seismic hazard maps for slope stability analysis is used PGA value of 0.30. The existing conditions of Ratu Boko slope had a safety factor which is about 1.983 and has decreased became 1.926 due to the development of the Andrawina Plaza based on Bishop method. If there is parking construction with dynamic load 46 kN/m2 the safety factor became 1.889. Under dynamic conditions, slope stability analysis of Ratu Boko gave SF 1.286 for existing slope and has decreased became 1.153 due to the development of the Andrawina Plaza. If there is parking construction with dynamic load 46 kN/m2 the safety factor became 1.204. Based on slope stability analysis under both static and dynamic condition show that infrastructure development at Ratu Boko Site still meet the minimum safety factor criteria required.

Keywords
3D slope stability; limit equilibrium; safety factor; dynamic load

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/f37xjTdgzMCY

Corresponding Author
Dwiaji Ari Yogyanta

Institutions
a) Civil Engineering Department, Institut Teknologi Sepuluh Nopember, Surabaya 60111, Indonesia
*ariyogyanta[at]gmail.com
b) Biology Department, Institut Teknologi Sepuluh Nopember, Surabaya 60111, Indonesia

Abstract
Peat is an organic soil which has very low bearing capacity and very high compressibility; its organic content is higher than 75%. Peat is classified into two categories, amorphous granular peat and fibrous peat (fiber content > 20%). Fibrous peat has higher bearing capacity compared to the amorphous one due to its fiber content. When the fiber undergone decomposition, however, its bearing capacity drops and bigger compression takes place. Due to that reasons, decomposition process of fibrous peat has to be accelerated before the construction starts in order to prevent the change of its properties. In this study, lignocellulolytic bacteria was used to accelerate the fiber decomposition. The results showed that 10% of bacteria with 28 days curing period given the optimum results. The fiber content decreased from 50% to 36.67% in 28 days curing period. The coarse and medium sizes of fiber decreased 5.13% and 22.03%, respectively; but the fine fiber increased 27.16% because of the change of coarse and medium fiber. Its unit weight and specific gravity decreased 6.83% and 7.89%, respectively. The peat compression increased 22.95% compared to the initial one; but the internal friction angle decreased 27.29%.

Keywords
acceleration, fiber decomposition, fibrous peat, lignocellulolytic bacteria

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/mLJy8hu9bMDZ

Corresponding Author
Devi Adillah Nuraini

Institutions
(a) Student of Building Engineering of Education FKIP UNS, Universitas Sebelas Maret, Indonesian
(b) Lecturer of Building Engineering of Education FKIP UNS, Universitas Sebelas Maret, Indonesian

Abstract
The building sector is the biggest contributor to greenhouse gases. Greenhouse gases are the couse of global warming, so the application of the concept green building is the most effective way to minimize the effect of global warming. The aims of the study is to (1) identify the Green Building concept application in the Universitas Sebelas Maret (UNS) Library (2) identify the level of Green Building concept application in the Universitas Sebelas Maret Library according to Greenship Existing Building Version 1.1. The research method was a qualitative. The population of the research was all existing buildings in the Universitas Sebelas Maret. The sample chosen was UNS Library by purposive sampling as the sampling technique. The research data validity as followed was data triangulation and validation by the subject experts of appropriate site development, energy efficiency and conservation, water conservation, material, air health and comfort, building and enviroment management. The result of study is, (1) UNS Library applies the green building concept (2) The level of Green Building concept application in the Universitas Sebelas Maret of Surakarta Library got “Bronze” by scored 41.025%.

Keywords
green building, UNS library, greenship existing building version 1.1

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/w3A6hyk87jYa

Corresponding Author
Sony Susanto

Institutions
1Institut Teknologi Sepuluh Nopember (ITS), Department of Civil Engineering, Surabaya, Indonesia

Abstract
The use of natural resources is widely used in construction operations, as well as in the operation of a building resulting from a construction project there is still a lot of energy that cannot be maximally utilized to reduce energy use so that sustainable concepts can be implemented properly. In implementing sustainable construction there are still many risks faced by contractors, clients, and regulations. Therefore, a risk analysis of sustainable construction projects is needed to reduce negative impacts and improve the implementation of sustainable construction in reducing energy use, so that sustainable construction can be implemented smoothly in Indonesia. In assessing the risks to a sustainable construction project there are still few research done, it requires risk modeling that takes into account sustainable factors. Identification of risk for sustainable construction projects is obtained from the literature review. While the assessment model is determined by considering 3 sustainable aspects (economic, social, environmental) approach to probability and impact. With regard to probability and impact, the ambiguity of human judgment is assessed, using fuzzy. The results of the concept found in the formula for assessing the risk of sustainable construction projects are Rsp = (Rec + Rso + Ren) / 3.

Keywords
Sustainable Construction Projects, Fuzzy Logic, Sustainable construction project formulas

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/xnZuhBAdqKaL

Corresponding Author
Putra Aulia Kesuma

Institutions
a) Departement of Civil Engineering, Institut Teknologi Sepuluh Nopember, Jl. Raya ITS, Surabaya 60111 Indonesia
*auliakesumaputra[at]gmail.com

Abstract
Highway is an important means of transportation to support community and economic activities. However, the highway also raises several problems, including traffic congestion. Traffic congestion can lead to losses material or non-material. Some efforts have been made by the City Government to overcome this problem. However, traffic congestion problems still occur, especially congestion that is non-recurrent. This type of congestion is dynamic and unpredictable. The risk management approach is an alternative that can be used to solve this problem, find out the dominant causes, and planning the right response. There are some earlier research, but have not found that describe patterns of interaction between risk factors and stakeholders involved in an effort to overcome this problem comprehensively. Traffic congestion is a complex problem. Therefore, Social Network Analysis (SNA) became one of the powerful methodologies used to describe and understand patterns of relations in complex problems. This research is intended to model risk factors causes traffic congestion, and stakeholders involved. Data analysis was taken base on respondents perceptions of several relevant stakeholders. The results of this study are expected to be a reference for stakeholders to understand and find the best response to overcome traffic congestion problems.

Keywords
risk management, non-recurrent traffic congestion, urban highways, stakeholders, Social Network Analysis (SNA)

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/6RU4AnkGQ7Fc

Corresponding Author
NOOR MAHMUDAH

Institutions
(a) Department of Civil Engineering, Universitas Muhammadiyah Yogyakarta, Jalan Brawijaya Bantul 55183, Indonesia
*noor.mahmudah[at]umy.ac.id
(b) Department of Electrical Engineering, Universitas Muhammadiyah Yogyakarta, Jalan Brawijaya Bantul 55183, Indonesia
(c) Institute of Energy Infrastructure Universiti Tenaga Nasional, Kajang 43000, Selangor, Malaysia

Abstract
Parking is an absolute requirement to support activities in commercial area. Recently parking lot of Abu Bakar Ali Yogyakarta is quite busy to accommodate motorcycle that will go to Malioboro, Yogyakarta. Hence this study aims to analyze the demand and supply of motorcycle parking lot of Abu Bakar Ali, Yogyakarta. The method employed in this study is a field survey to count the number of motor cycle entering and exiting parking lot and to estimate the parking capacity. The analysis results show that the maximum accumulation parking of motorcycle occurs on weekend which was equal to 401, while on weekday were 192 motorcycles. The static parking space was 2760 m2 with a configuration using a 90 degrees pattern so it can only accommodate 1306 motorcycles. In addition, the parking system is manually and lack of information about parking space availability for the users so it causes less efficient services. By considering the rapid growth of motorcycle in Yogyakarta, and in order to support the Provincial Government Regulation to prohibit the use of motorcycle in Malioboro area, hence it is very important to apply Intelligent Transportation System, particularly to manage the parking lot of motorcycle in this area efficiently.

Keywords
Intelligent Transportation System (ITS), parking, Abu Bakar Ali, Yogyakarta

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/jWVA2xZftqm8

Corresponding Author
Anna Amalia Misdanik

Institutions
a) Civil Engineering Department, Faculty of Civil, Environmental and Geo Engineering, Sepuluh Nopember Institute of Technology, Surabaya, Indonesia
*annaamaliam[at]gmail.com
b) Civil Engineering Department, Faculty of Civil, Environmental and Geo Engineering, Sepuluh Nopember Institute of Technology, Surabaya, Indonesia

Abstract
Residential area around Kedurus Boezem is often inundated when rains even though topographically the water in this area can flow to boezem. One part contained in a boezem is a spillway that is a lateral structure which functions to connect rivers with boezem area. The existing spillway must be able to increase effectiveness of boezem. Determination of spillway type must consider the geological, topographic, etc. In spillway there is a threshold that is used as a building to raise the water level and determine the water flow rate. Therefore, the selection of the dimensions of the spillway can affect the flow velocity distribution and the flow rate distribution which affects effectiveness of boezem. The research uses two DEM (Digital Elevation Model) data, they are existing DEM and DEM data which is assume the boezem is in full bank condition. Every DEM data simulation is performed using variations in the threshold (A) dimension. The simulation is carried out using HEC-RAS by modeling boezem and inundation area into 2D area so that velocity distribution (V) and flowrate (Q) can be analyzed. At the end of this simulation analysis was carried out to choose the best spillway dimension in effectiveness of Kedurus Boezem.

Keywords
Boezem; Spillway; Flow velocity; Flow rate

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/jpPcT4f7xbqF

Corresponding Author
Annisa Ramadhani

Institutions
a) Student of Civil Engineering, Faculty of Civil Engineering and Planning, Islamic University of Indonesia, Jalan Kaliurang KM 14, Yogyakarta 55581, Indonesia
*rmdhninisa31[at]gmail.com
b) Lecturer of Civil Engineering, Faculty of Civil Engineering and Planning, Islamic University of Indonesia, Jalan Kaliurang KM 14, Yogyakarta 55581, Indonesia

Abstract
Selection of the type of support foundation should be taken accurately because the strength of the foundation as a support for the upper structure greatly influences the strength of building. Wherefore, analysis of foundation carrying capacity and settlement are indispensable. This research aims to determine support capacity by applying various methods and the value of settlement that occurs due to loading from upper structures.This research utilizes method, such as Skempton Method, Cooke dan Whitaker Method, Meyerhoff Method, Alpha Method, Lambdha Method and Betha Method. Its also employes Finite Element Method, namely Software Plaxis 2D V.8.6 as calculation and modelling tools, final results of the analysis could be compared with empirical and non-empirical methods. The object of this is Lemah Abang Bridge that located in Sleman Regency and Gunungkidul Regency frontier, Yogyakarta Province, with Well Foundation or Caisson foundation as the lower structure. The results show that the support capacity meets the requirements, such as : Skempton Method is 1693,701 kN; Cooke dan Whitaker Method 2695,063 kN; Meyerhoff Method is 2695,063 kN; Alpha Method is 632,374 kN; Lambdha Method is 1663,359 kN; Betha Method is 1579,751 kN and field data is sebesar 20570,876 kN. According to the research, the minimum value of Qu are obtained by using Meyerhoff Method and Betha Method. Furthermore, The value of settlement with empirical method is 2,5075 cm and the settlement with Software Plaxis 2D is 4,62 cm. Based on the results, further analysis are needed by using another empirical methods or other softwares, to get various results.

Keywords
Caisson foundation; Support Capacity; Plaxis 2D V.8.6

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/eMgW9CrnRpaU

Corresponding Author
Ratri Ayu Rahmayanti

Institutions
a) Students of Civil Engineering Department, Faculty of Civil, Environmental & Geo Engineering, Sepuluh Nopember Institute of Technology
Jalan Raya ITS, Surabaya 60111, Indonesia
*ratriayu.pu[at]gmail.com
b) Civil Engineering Department, Faculty of Civil, Environmental & Geo Engineering,
Sepuluh Nopember Institute of Technology, Surabaya

Abstract
The Surabaya IV Regional Construction Services Center (BJKW IV) is an Organizational Unit under the Ministry of Public Works and Public Housing. One of the main tasks is the management of Non-Tax State Revenues. BJKW IV Surabaya has the assets of the Hall, Mess/Dormitory and Classrooms which can be used for internal activities and leased to private institutions related to construction services. However, the rental rates of the above building assets that are still used Government Regulation Number 38 of 2012 cannot meet operational and maintenance needs. This study aims to establish the latest rental rates that are able to meet operational and maintenance needs. In this paper, the analysis of rental rate determination uses the method of Activity Based Costing (ABC). The results show that the tariff requirements to meet operational and maintenance requirements are as follows: Hall rental rates is 1.15 times the original rate, Mess/Dormitory Rooms rental rates is 2,75 times the original rates, Large Classes rental rate is 2,25 times the original rates and the Small Class Room rental rate is 1,85 times the original rate. Based on the results above, BJKW IV Surabaya needs to consider tariffs for commercialization to the private sector.

Keywords
Calculation of Rental Charges, Non-Tax State Revenues Building, Activity Based Costing(ABC)

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/uFRtyWMmVz4A

Corresponding Author
NOOR MAHMUDAH

Institutions
(a) Department of Civil Engineering,
Universitas Muhammadiyah Yogyakarta,
Jalan Brawijaya Bantul 55183, Indonesia
*noor.mahmudah[at]umy.ac.id

Abstract
The growth of population leads to high traffic volume on several urban road in Yogyakarta. Sentul signalized intersection is one of intersection in Yogyakarta that is very potential causing traffic congestion. Therefore, this study aims to analyse the performance of intersection with simulation using Vissim 10 and to estimate the congestion cost. The methods used in this study were traffic counting at intersection and modelling the traffic using Vissim 10. The results of study showed the performance of existing condition at intersection was very poor with level of service (LOS) F and average delay of 106.71 second per vehicle. In addition, the estimated congestion cost of intersection was 3,722,627 rupiah per hour. The solutions simulated using Vissim 10 were consisted of re-setting green time of the traffic light, road widening for each approach area, applying left turn on right (LTOR) for the west-arm of intersection, and removing on-street parking area The analysis results showed that intersection performance was increasing with LOS of E, average delay was 74.23 second per vehicle, and congestion cost became 1,876,757 rupiah per hour. Hence it is concluded that the alternative solutions in this study can be applied to reduce congestion cost at Sentul signalized intersection.

Keywords
Congestion cost, signalized intersection, Vissim, Sentul, Yogyakarta

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/n7fAqgchJaVF

Corresponding Author
Anwar Efendy

Institutions
(a) Institut Teknologi Sepuluh Nopember, Surabaya

Abstract
There are some factors that cause deformation on the runway, such as the pressure of repeated loads caused by large queues of aircraft. The aggregate available in nature has begun to decrease in amount caused considering that infrastructure development in Indonesia continues to increase. Therefore, new material innovations are needed to overcome this, such as the use of flyash as an artificial aggregate of geopolymers in concrete asphalt mixtures. This research was carried out in some tests including Marshall testing which intended to determine the characteristics of artificial aggregate pavement mixtures, using open gradations with specification BBA. Then testing the resistance to deformation (Creep) on the artificial gradation aggregate pavement mixture using the UTM30 Dynapave. Based on the characteristics of the Marshall test the optimum bitumen content value was obtained open gradations has OBC value of 6.1%. Results of Creep test obtained strain value is 7874,195 microstrain and stiffness value is 13,297 MPa with repetition of 3600 times. It can be concluded that the pavement mixture with open graded artificial aggregate (BBA) has the ability to resist deformation.

Keywords
Runway, artificial aggregate of geopolymer, Marshall test, Creep test.

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/vA3j7XQUedVJ

Corresponding Author
Sri Puji Lestari

Institutions
(a) Master in Engineering in Natural Disaster Management,
Engineering Faculty, Universitas Gadjah Mada, Indonesia

Abstract
The area of flood inundation in Demak Regency has reached 13000 Ha. One of the reason was the overflow of the Jragung River system (BBWS, 2010). This flood has caused direct losses (damaged and flooded paddy fields) and indirect losses (obstructed traffic due to flooded/interrupted roads). Structural flood mitigation efforts have been carried out on the Jragung River system through the Jragung River System Flood Control activities which include river normalization activities (river channel improvement), cliff elevation, and elevation of structural buildings that cross the river. However, non-structural control efforts need to be made to maximize mitigation efforts, for example through a flood early warning system. In this study, analysis of early warning time of the flood in the Jragung River system will be carried out in an effort to reduce losses and damage. The location in this study is the watershed of the Jragung River upstream system with the control points used in this study are Jragung Dam and Guntur Dam. This study includes hydrological modeling using HEC-HMS 4.2.1 software (Hydrologic Engineering Center - Hydrologic Modeling System) and hydraulic modeling using the HEC-RAS (Hydrologic Engineering Center-River Analysis System) software. The results of the analysis based on the 2, 5, 10, 20, 25, 50, 100, and 1000 years return period shows that the flood discharge Q50, Q100, and Q1000 has the potential to cause flooding in the lower reaches of the Jragung River system. Based on the results of the warning time analysis, for Q50 flood discharge, the maximum potential warning time (Twp) is 5.3 hours, the recognition time (Tr) is 2.4 hours, and the maximum mitigation time (Tw) is 2.9 hours. for Q100 flood discharge, the maximum warning time potential (Twp) is 5.8 hours, the recognition time (Tr) is 1.8 hours, and the maximum mitigation time (Tw) is 4 hours. Whereas for Q1000 flood discharge, the maximum potential warning time (Twp) is 8.7 hours, the recognition time (Tr) is 1.2 hours, and the maximum mitigation time (Tw) is 7.5 hours. All evacuation procedures can be carried out at the maximum mitigation time. The results of this study are expected to be an input for the government to provide flood early warning for communities along the Jragung River system, for example by installing flood alarms.

Keywords
Jargung River, the maximum potential warning time, the recognition time, the maximum mitigation time

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/Adz6EnfYhQRM

Corresponding Author
Desyta Ulfiana

Institutions
1) Civil Engineering Department, Engineering Faculty, Diponegoro University, Semarang, Indonesia

Abstract
The limited of government budget for the small dams construction in Semarang Regency has led to the need for determining the construction priority. However, the large number of these constructions technical aspects causes the determination of construction priorities to be difficult. One of the best methods for multi-criteria decision making is the Technique for Order Performance by Similarity to Ideal Solution (TOPSIS). However, ranking and weighting the criteria that use in these constructions was difficult. It was due to human assessment factors that were less precise especially on linguistic variables criteria. Therefore, a fuzzy method was needed to numerating these criteria. There are eight alternatives of small dams and seven criteria of technical aspects analyzed in this study. The first was determining membership function and weighting each criteria. Then, the modified TOPSIS method was applied to rank the eight alternatives. The highest priority was determined by finding alternative that has the largest closeness coefficient (CCi). Its represent alternative with closest distance to fuzzy positive ideal solution and farthest distance to fuzzy negative ideal solution. Based on the results of the analysis, Mluweh Small Dams has the highest CCi value of 0,612. So, Mluweh small dams is the highest priority in the construction of small dams in Semarang Regency

Keywords
Fuzzy; TOPSIS; small dams; construction priority

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/2pnaPE3jJR6b

Corresponding Author
Muhammad Ikhsan

Institutions
Universitas Teuku Umar

Abstract
reservoir is one of the storage that has a function as water storage when excess water and can be used during the dry season. The collected water is usually used for downstream needs such as for irrigation water, clean water needs, can even be used to contain energy for power plants. The Geunang Uyat Reservoir is located in the District of Panton Reu, West Aceh Regency. built to overcome the shortage of clean water one of the most urgent is for irrigation water needs. The construction of the reservoir is expected to meet irrigation needs which can irrigate approximately 500 hectares in Meutulang Village. The method used is Ripple Curve to calculate the amount of adequate storage capacity at the level of certain water requirements. The need for irrigation water on agricultural land planned through the construction of reservoirs is expected to maximize agricultural production in the region, which so far is only a rainfed rice field. the data used in this study are secondary data from related institutions, such as rainfall data obtained from BMKG Cut Nyak dhien Nagan Raya Regency. From the results of data analysis, there are several results, namely the analysis of maximum rainfall occurred in 2006 in November amounting to 538 mm and the lowest in 2010 in July at 41 mm, from the mainstay discharge analysis obtained 0.032 ml. Based on the analysis, the cumulative value of the inflow of 2.682.868 m3 and the cumulative outflow of 1,575,443 m3 was obtained with a volume of storage at Geunang Uyat reservoir which was equal to 70. 708,245 m3

Keywords
Reservoir; Storage Capacity; Irrigation; Rippl Curve

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/kXqYaNBdtz3j

Corresponding Author
Isra Suryati

Institutions
University of Sumatera Utara

Abstract
Particulate Matter 10 micron (PM10) is one of the primary pollutants in the form of dust measuring 10 microns in ambient air. PM10 comes from biogenic and anthropogenic sources. One anthropogenic source that contributes PM10 emissions is industrial activity. The presence of PM10 from industrial activities is not only in terms of concentration but also the heavy metal content of the PM10. Heavy metals have a harmful effect on human health. This study aims to analyze the content of heavy metals in PM10 sourced from industrial activities around the Medan Industrial Area. In addition, this objective also wants to determine the correlation between heavy metal content and industrial activity. Taking PM10 samples using HVAS (High Volume Air Sampler) equipment. Analysis of the content of heavy metals in PM10 was carried out by the ICP-AES (Inductively Couple Plasma Atomic Emission Spectroscopy). The sampling location was in Medan Indutrial Area as many as 3 locations. The results of laboratory tests showed PM10 concentration in front of PT. S was 305.5 micrograms / cubic meter; Mahmud Gang is 66.04 micrograms / cubic meter, and in front of PT. MM is 382 micrograms / cubic meter. Meanwhile, heavy metals content in PM10 was obtained for As of 0.82 - 0.94 micrograms / meter cubic; Cd of 1.42 - 1.62 micrograms / cubic meter; Cr of 0.06 - 0.07 micrograms / cubic meter; Hg of 0.52 - 0.68 micrograms / cubic meter and Pb of 0.29 - 0.33 micrograms / cubic meter Based on the correlation test between pollutant sources and metal content in Medan Industrial Area, the correlation between heavy metals As, Cd, Cr, Hg, and Pb with industry was positively correlated (r = 0.858 - 0.92). this shows that the presence of industry has an effect on heavy metal content in am ambient PM10 at Medan Industrial Area.

Keywords
heavy metal, ICP-AES, industry, PM10

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/Vm6cnfw83Cau

Corresponding Author
Gito Sugiyanto

Institutions
1 Jenderal Soedirman University, Civil Engineering Department, Mayjend Sungkono Street km.5, Blater, Kalimanah, Purbalingga, Central Java, Indonesia
2 Jenderal Soedirman University, Department of Mathematic, Dr. Suparno Street, Karangwangkal, Purwokerto, Banyumas, Central Java, Indonesia
3 Health Polytechnic Ministry of Health of Yogyakarta, Mangkuyudan Street MJ III/304 Yogyakarta, Indonesia

Abstract
The deficiency of road infrastructure is a reduction or decrease in the function of road infrastructure resulting in inefficient functioning of road infrastructure. This can trigger potential traffic accidents. Traffic accident is one of the serious problems in road traffic. Road crash are not only caused by the condition of the vehicle and driver, but also due to many factors, including road design (horizontal alignments and vertical alignments), stop sight distance, road pavement condition, completeness of traffic signs or directions, and weather. The aim of this research was to analysis the road safety audit of infrastructure deficiency at black spot area in arterial road at Purbalingga. The study location was in Mayjend. Sungkono Street, Blater, Kalimanah, Purbalingga, Central Java, Indonesia. Three parameters that analyzed in road safety audit i.e.: condition of road geometric, condition of road pavement, and harmonization of road equipment facilities. The result of the study shows that some of road infrastructures must be repaired to reduce the potential traffic accident. Road geometric aspect involves the preceding sight distance and shoulder width. Aspect of road pavement condition involve lane or shoulder drop off. Harmonization of road equipment aspect involves speed limit sign (50 km/h and 40 km/h), warning sign along black spot location.

Keywords
Infrastructure deficiency; road safety audit; black spot; traffic safety

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/Mcd4qQ2PvTaE

Corresponding Author
Aninda Rahmaningtyas

Institutions
a) Student of Magister Program, Hydroinformatic, Civil Engineering Department, Sepuluh Nopember Institute of Technology
Raya ITS Street, Keputih, Sukolilo, Surabaya 60111, Indonesia
rahmaningtyas.aninda[at]gmail.com

b) Lecturer of Civil Engineering Department, Sepuluh Nopember Institute of Technology
Raya ITS Street, Keputih, Sukolilo, Surabaya 60111, Indonesia

Abstract
The eastern part of Surabaya is the low area which are often flooded during the rainy season. Rainflow in this area influenced by tides so that inundation will occur when it rains along with the sea in high tide conditions. To be able to mitigate these inundations it is necessary to know the potential areas of inundation caused by rain with various return periods. In this study a flood flow simulation with a combination of 1D and 2D was carried out using the HEC-RAS computer program. The simulation results show inundated areas so that information can be obtained on the depth, area and duration of the flooded area in the eastern part of Surabaya.

Keywords
Inundation; HEC-RAS; East Surabaya

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/MHBE39egJCUX

Corresponding Author
Erlin Susanti

Institutions
a) Students of Department Civil Engineering Faculty of Civil, Environmental & Geo Engineering, Sepuluh Nopember Institute of Technology
Jalan Raya ITS, Surabaya 60111,Indonesia
*susantierlin80[at]gmail.com
b) Department Civil Engineering, Faculty of Civil, Environmental & Geo Engineering, Sepuluh Nopember Institute 0f Technology, Surabaya

Abstract
The reservoir is a water resource facility that has a function as a storage and water provider. The abundant water in the rainy season is accommodated, stored and used appropriately throughout the year. The fact that is happening now as time goes by is that many reservoirs in Indonesia have decreased function and performance. One of them occurs in the Bajulmati Reservoir. This study aims to analyze the Operating Pattern of Bajulmati Reservoir so that the reservoir is expected to provide optimal performance in utilization for irrigation, raw water,and Micro Hydro Power Plants. This research was conducted by forming a model with Dynamic Programming and simulation. The first simulation was carried out according to the operation of the current reservoir, which is prioritized for irrigation (factor kT=100%), irrigation water is passed through a turbine (PLTMH). In the second, the reservoir was operated with the fulfillment of irrigation and raw water, a factor of kT&

Keywords
Reservoir, optimization, dynamic programming

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/RCcBQkT7VdLW

Corresponding Author
Maria Handayani Setyaningrum

Institutions
a) Master Program Civil Engineering, Diponegoro University,
Jl. Prof Sudharto, SH. Tembalang Semarang 50275
*setyaningrum.mh[at]gmail.com
b) Civil Engineering Dept. Diponegoro University
c) Industrial Engineering Dept. Diponegoro University

Abstract
The government issued various national programs to assist low-income communities in order to obtain decent housing. The provision of housing for low-income communities is accommodated by the Directorate General of Housing Provision, one of which is through the Special Housing provisions-, conducted by the Directorate of Special Housing. This study analyzes simultaneously the success factors using Structural Equation Modeling (SEM) modelling to see empirically the influence of each factor on the success of special housing provision as an evaluation for policy makers to monitor the implementation of future special housing provisons- policies. The test results obtained that the accepted hypothesis is that land availability influences the factors of cooperation among stakeholders, the cooperation among stakeholders influences the number of special housing built, and the political will affects the budget factor. The main performance indicator of special housing provisions- is the number of special housing built, meaning that cooperation among stakeholders influences the successful of this program. Special housing programs really require commitment and active role of all stakeholders involved in special housing provisions- for the effective policy goals achievement. The higher the collaboration between stakeholders with all the forming indicators carried out, will be directly proportional to the success of a special housing provisions program.

Keywords
Special Housing Provisions-; Success Factors; SEM

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/2UMdJaZctfYP

Corresponding Author
Gusti Made Bagus Baskara

Institutions
a)Transportation Engineering, Surabaya Institute of Technology
jalan Raya ITS, Surabaya 60111, Indonesia
*gstbagus32[at]gmail.com

Abstract
The type of damage to the pavement layer is cracking and permanent deformation. The mechanism of cracking in the pavement layer occurs because of the tensile force at the bottom of the pavement layer due to the wheel load of the vehicle. One parameter of a mixture to achieve strength and durability as needed is the relationship of stress and strain which shows the stiffness of a mixture. Indirect Tensile Strength is a method used to show the stiffness of a mixture. As infrastructure development in Indonesia continues to increase, the availability of natural aggregate materials is decreases. One of the uses of geopolymer can be used as artificial aggregates to replace the depleted natural aggregates. The purpose of this study was to review the stiffness modulus of concrete asphalt mixture with the use of artificial aggregates made from geopolymer by using open gradations of BBA (Beton Bitumineux pour chausees Aeronautiques). From the test results using the Dynapave UTM30 tool at 20 degrees Celcius and 60 degrees Celcius, the mixture of stiffness modulus values is 3223 MPa and 129 MPa.

Keywords
Artificial aggregates, Fly ash, Geopolymer, Stiffness Modulus, Runway pavement.

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/GzB8Da3g24bw

Corresponding Author
Rezky Susmono Karuru

Institutions
Civil Engineering, Institut Teknologi Sepuluh Nopember
Jalan Arief Rahman Hakim, Surabaya 60111

Abstract
The West Surabaya area, especially in the lower reaches of Tandes Rayon, has a high level of inundation risk due to several factors, one of which is the influence of sea level rise. Therefore a puddle map is needed which is one of the efforts to minimize the impact of inundation that occurs in the downstream area of Tandes Rayon by using scenario condition, namely inundation scenarios for the downstream condition of Rayon Tandes, and inundation scenario in the event of sea level changes to the global warming. Hydrological data processing can use HEC-HMS software and for hydraulic data processing requires primary channel profile data and can be processed in HEC-RAS 1D. Inundation map modeling in the Lamong bay area uses 2D HEC-RAS which is used to determine flood-prone locations caused by sea level rise in simulated scenarios. The results of this analysis a map of the inundation location that is prone to flooding in the Tandes Rayon area can be obtained and can be used for flood warnings and mitigation. From the inundation map that is produced, it can be seen the inundation area, the height of inundation that occurs, and the length of inundation time.

Keywords
Inundation; Global Warming; Sea Level Rise; Surabaya; HEC-RAS.

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/jNHnZhzTRLqJ

Corresponding Author
Andi Candra Septaprasetya

Institutions
a) Students of Civil Engineering Department, Faculty of Civil, Enviromental & Geo Engineering, Institut Teknologi Sepuluh Nopember (ITS), Sukolilo,
Surabaya 60111, Indonesia
*bearelits42[at]gmail.com
b) Civil Engineering Department, Faculty of Civil, Enviromental & Geo Engineering, Institut Teknologi Sepuluh Nopember (ITS), Sukolilo,
Surabaya 60111, Indonesia
c) Statistics Department, Faculty of Matematics, Computation, and Data Science, Institut Teknologi Sepuluh Nopember (ITS), Sukolilo,
Surabaya 60111, Indonesia

Abstract
Most of Surabaya area is lowland, which is 80.72% with an altitude between 3-8 meter above sea level with a slope of less than 3%. Therefore, the city drainage system requires pump station operations to drain rainwater. One of the factors that can hinder the performance of pump stations in flood management is the damage to the drainage pump unit. This study has succeeded in finding motor damage as the type of dominant damage at drainage pump in Surabaya. The analysis of the types of dominant damage using the Analytical Hierarchy Process (AHP) by determining the type of dominant damage as the objective in the first level hierarchy, the dominant damage criteria are at the second level, and the types of damage are at the third level as an alternative decision. The types of damage are obtained by processing historical data of pump damage in 2017 to 2018, while the criteria for determining the dominant type of damage and the assessment in the AHP analysis are obtained from interviews and questionnaire with experts from the Surabaya city government and pump companies. The results of this study can be used to find the dominant causes of damage and forms of mitigation.

Keywords
Drainage, Pump Station, Dominant Damage Type, Multi Criteria Decision, AHP

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/A6kTvD73UCGm

Corresponding Author
Vrischa Natalia Arung

Institutions
a) Civil Engineering Departement, Sepuluh Nopember Institute of Technology, Jalan Arif Rahman Hakim, Surabaya 60111, Indonesia
*vrischa_arung[at]yahoo.com
b) Civil Engineering Departement, Sepuluh Nopember Institute of Technology, Jalan Arif Rahman Hakim, Surabaya 60111, Indonesia

Abstract
The number of traffic accidents in the city of Surabaya increases every year, and the main cause of traffic accidents is the human factors. Total of accidents that occurred during 2016 were 1,126 accidents and in 2017 there were 1,349 accidents which caused 174 people died, 144 people were seriously injured and 1,433 people were lightly injured. In this research, road accident data in 2013-2017 were analyzed to calculate Accident Rates, then determine accident-prone areas (blacksite) with the Z-Score method, determine accident-prone points (blackspot) using the Cumulative Summary (Cusum) method, and calculation the unit cost of accident victims is carried out by using the Gross Output (Human Capital) method. From the analysis of Z-Score, it is known that three road segments are blacksite in the city of Surabaya, namely Ahmad Yani road, Mastrip road, and Ir.Soekarno road. Blackspot on Ahmad Yani road as a road with the highest number of accidents is at STA 1+025 - STA 2+275. The road that have the highest accident costs is Mastrip road, which is costs Rp.6.507.597.751,00.

Keywords
blacksite; Z-Score; Cusum; Gross Output

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/W9TFwyEVQhPK

Corresponding Author
Aderita Mariana Takeleb

Institutions
Universitas Gadjah Mada

Abstract
The Comoro river basin is one of the watersheds in Timor Leste with an area of 212 km2. The Comoro river and its tributaries are the main surface water source for clean water needs in the city of Dili. The purpose of this study was to estimate the availability water from 4 sub watershed of Comoro using the F. J. Mock model. The Mock method is rainfall-runoff model and was used when measured discharge data is not available. The input of this model are rainfall, potential evapotranspiration, soil moisture and watershed characteristics. The result of calibration and verification of model in the upstream of Comoro watershed indicate that the value of the correlation coefficient were 0.8 and 0.7 while the volume error (VE) were 0.05 and 0.04, respectively. The parameters that was produced in the calibration of the Upper Comoro watershed are then used to estimate the discharge in the Beemos, Maloa, Kuluhun and Becora sub-watersheds due to no observational discharge data available. The dependable flow 90 % from the total of the four sub-watersheds is 0.06 m3 / sec. This shows that surface water availability is only 1,718,053.808 m3/year to meet domestic and non-domestic needs in Dili.

Keywords
Mock Model, hydrologi parameter, rainfall-runoff model, dependable flow

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/Mqt2fjgEZnGP

Corresponding Author
Arif Ardianto

Institutions
a) Student in Systems and Transportation Engineering, Gadjah Mada University, Yogyakarta, Indonesia
b) Faculty of Engineering, Department of Civil and Environmental Engineering, Gadjah Mada University, Yogyakarta, Indonesia

Abstract
Queues at toll gates are still the main problem on the toll road. Removing this queue, therefore, is very important. The fact that the Indonesian government will implement the Multi Lane Free Flow (MLFF) system as solution is a good news. However, the Government needs to see more about the problems that might arise due to queues such as changes in traffic characteristics and arrival times of vehicles at the main toll road meeting point. In this study, the author conducted traffic modeling using Vissim software to predict changes in traffic patterns that occur by measuring changes in traffic volume and vehicle speed through ramp on and main toll roads. Traffic counting and vehicle speed are carried out during the busy hours period of toll road services. The results of this study can solve post MLFF implementation problems so that their emergence can prevent in the future by predicting increased travel time after the implementation of MLFF.

Keywords
MLFF, Toll Gate, Vissim

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/uLavHEcptWfT

Corresponding Author
Fikri Rezkyansyah Sasmita Nugraha

Institutions
a) Student of Civil Engineering Department, Faculty of Civil, Environmental & Geo Engineering, Sepuluh Nopember Institute of Technology
Jalan Raya ITS, Surabaya 60111, Indonesia
*rezkyansyah.ubits[at]gmail.com
b) Civil Engineering Department, Faculty of Civil, Environmental & Geo Engineering, Sepuluh Nopember Institure of Technology, Surabaya

Abstract
In the construction services sector, the competency of construction engineering experts obviously is a major factor. This is because competency factors become the dominant factor both causing failure and the success of the project. The competency of construction engineering expert needs to be kept competent so that a project can succeed and run smoothly. On the other hand, the efforts to maintain competences also accordance with Sustainable Long Term Development Program by the government of the Republic of Indonesia. In order to solve various problems in the project and face the challenges of construction due to the globalization era, the competency of construction engineering expert is needed. Integration of skills, knowledge and attitudes will produce individual competencies in carrying out their work. Competency assessment is measured by an individuals performance. Performance is the final result of competence. In many construction projects, the performance of construction engineering expert is the most required in the construction process cycle. This research will be conducted by distributing questionnaires to construction engineering expert with restrictions that have the certification of expertise with qualification young expert (Ahli Muda). Within questionnaires, contain questions regarding skills, knowledge and attitude that affect competency. Then micro performance and macro performance that influence the performance of a construction engineering expert. The method used in analyzing these relationships and interactions is Structural Equation Modeling (SEM). This research is expected to be able to show and explain the relationships and interactions between competencies towards construction engineering expert performance in Indonesia, with study case in PLTMG ALOR 10 MW Project.

Keywords
Competence, Performance, Construction Engineering Experts, Structural Equation Modeling (SEM)

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/EL9qMVxhJmKY

Corresponding Author
Budi Yulianto

Institutions
Civil Engineering Department,
Engineering Faculty,
Sebelas Maret University,
Jl. Ir. Sutami 36A,
Surakarta (57126),
Indonesia

Abstract
Conditions in the field are often encountered by traffic violations caused by weak law enforcement with the limitations of law enforcement officers in its implementation in terms of human resources and the system. Vehicle drivers commit traffic violations, where they park their vehicles on pedestrian area, cyclist lane, roads that are prohibited for parking and others. In order to minimize traffic violations, a tool is needed to support law enforcement, especially in relation to the reporting system of traffic violations. The reporting tool must be effective, efficient and transparent in its reporting system. The purpose of the study is to conduct parking management and develop an Android-based parking violation reporting application called Buset Parking Law App. The results of the analysis parking characteristics in the study area indicate that vehicle parking violations are very significant. The implementation of the Buset Parking Law App shows that this application is easy to use, accurate, and transparent.

Keywords
Parking, Android, traffic violation,

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/qewQzH8x24UF