Technical feasibility analysis of reservoir on agricultural area

Sekolah Tinggi Teknologi Garut, Department of Civil Engineering, Jl. Mayor Syamsu No. 1, Garut 44151, Indonesia

^* Corresponding author: sulwanpermana@sttgarut.ac.id

Abstract

The availability of raw water is a major requirement to increase agricultural production, especially rice, as well as for domestic purposes for the community. One source of water is rivers used by communities to fill daily needs for both agricultural and other needs. This research is a survey research, conducted in Puspamukti Village, Subdistrict Cigalontang, Tasikmalaya Regency. With The purpose of knowing the feasibility of reservoir development. The source of water used at the research locus is from the river and several springs utilized by the community to irrigate the agricultural area of 750 ha. Based on topographical conditions, the area has a potential to be made into a reservoir that could be as a supply for domestic agricultural and water areas. The method of calculating the average rainfall of 2 rain posts is done by various return period, the calculation of dependable flow and water balance, and the design flood discharge. The watershed area is 6.4 km2. The maximum dependable flow is 0, 6 m³/sec. Based on the dependable flow, area that can be irrigated is only about 440 ha., and the domestic needs is about 9,1 lt/sec. The reservoir development at the research locus is considered less feasible.