MODEL NRECA UNTUK PREDIKSI KETERSEDIAAN AIR DI DAERAH IRIGASI CITANDUY KOTA TASIKMALAYA

Abstract

The agricultural sector is still the prima donna of the community and is used as a job to support life. However, many agricultural areas have been converted into settlements, especially in urban areas. Almost every year, the harvested area has decreased. To anticipate this, the government and local governments have built a lot of water infrastructure, especially weirs and dams. The Citanduy irrigation area with a service area of 427 hectares is one of the irrigation areas in the City of Tasikmalaya, so it is very vulnerable to the conversion of rice fields into settlements. The availability of water is crucial in fulfilling agricultural areas. This research was conducted to determine the mainstay discharge in the Citanduy-Sirnagalih watershed covering an area of 474.65 determining calibration parameters, namely PSUB, GFW, and initial groundwater reservoirs with values of 0.8, 0.29: 100, and NSE values of 0.719. The Q80's dependable flow is 17.4 m3/s. The mainstay of debit is the availability of water in the Citanduy irrigation area. Based on this reliable discharge, planting seasons I and II can still be carried out simultaneously.