Indonesia Conference Directory

The existence of rivers in an area is very important because it is often used by the community for daily needs. In addition to the availability of raw water, it is also used for agricultural purposes. Cipalebuh River with 42 km2 of river flow area is a river in the southern part of Garut Regency; this river is used for drinking water supply and for irrigating 1016 ha of rice field area. The purpose of this study was to determine the magnitude of changes in the Cipalebuh river flow due to changes in climatological parameters such as average air temperature, average relative humidity, average wind speed, duration of solar radiation, air pressure, and solar radiation. The rainfall stations in the Cipalebuh river basin are the Pameungpeuk and Cisompet rainfall stations. Calculation of discharge using simulation method from F.J. Mock, while calculating evapotranspiration with the Penman-Monteith method. The net need for water in the rice fields is 1.4 lt/sec/ ha. Based on the results of the calculation of the effect of changes in climatological parameters it does not significantly affect the flow of water in the Cipalebuh river so that the availability of raw water and irrigation is not much disturbed.