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JUANA RIVER FLOOD MAPPING BY USING HEC-GEORAS
Zahir Elfares Wasim(a), Pradipta Nandi Wardhana(a)

(a) Program Studi Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia, Jalan Kaliurang Km 14.5 55584, Indonesia


Abstract

. Juana River is a river in Indonesia having high vulnerability degree toward flood occurence. The major factors causing flood in Juana River are river slope having value 0,00001, and narrowing river channel. Therefore the river experiences discharge capacity reduction. Juana River flood mapping is necessary to analyze extent of inundated area, especially regarding types of land utilization. This study used GIS software to process Alos Palsar image as Juana Valley topography, HEC-RAS 4.1 application for modeling the unsteady river flow or river analisys system (RAS), and HEC-GeoRAS 10.2 application to convert HEC-RAS 4.1 results into GIS software. As hydraulic modelling boundary condition, this research used 52 Juana sub basin discharge having return period 50 years and tides level at Juana Estuary. Research results showed that the extent of flood due to Juana River discharge was 37406 ha in both Kudus and Pati. Inundated area in Kudus consisted of 449,1 ha of fields, 8772,6 ha of rice fields, and 628,8 ha of settlements. While affected area in Pati were 1339,8 ha of fields, 17187,6 ha of rice fields, 6713,7 ha of ponds, and 2314,4 ha of settlements.

Keywords: Juana River, HEC-RAS 4.1, HEC-GeoRAS 10.2, Flood Inundation

Topic: International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/4P8ZtMkNWvaq

Conference: The 3rd International Conference on Sustainability and Innovation (ICoSI 2019)

Plain Format | Corresponding Author (Pradipta Nandi Wardhana)

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