OPTIMALISASI PENGATURAN IRIGASI WADUK SESUAI KEBUTUHAN AIR DAN KETERSEDIAAN AIR WADUK; OPTIMALIZATION OF RESERVOIR IRRIGATION MANAGEMENT ACCORDING TO WATER NEEDS AND RESERVOIR WATER AVAILABILITY

Nataniel, Caesar, Winarko, Edi

2015 | Skripsi | FMIPA UGM

Sermo Reservoir is a water source in Kulon Progo District and its surrounding, which is used for raw irrigation needs, household needs, industrial center needs, and other needs. The problem is, the capacity of reservoir is decreased, and water demands are increased. Therefore, research is needed for the optimal use of water from Sermo Reservoir, according to water needs and reservoir water availability, as well as priority of irrigation, in order to achieve the optimal value. Optimalization of reservoir irrigation management system implemented into a web based system. The processed data are water input flow data, rainfall input flow data, evaporation discharge flow data, and water needs data per period. The resulting data is water discharge release value per period. The optimal value is obtained from the value of water needs data per period, ratio of water needs per period, dam reservoir value, and optimalization of water discharge release per period, according to the water discharge output and prioritized sluice. The optimal value is obtained when the proportional value of distribution of water release and water discharge output value are met. At the high demand, the value of distribution of water release can approximate meet the value of water discharge output. While at the low demand, the value of distribution of water release should be kept to minimum, according to the water discharge output.

Kata Kunci : Optimalization, Water Input Flow, Water Discharge Output, Rainfall Input Flow; Evaporation Discharge Flow; Release; Ratio; Priority.