Penentuan Nilai Efisiensi Distribusi Saluran Irigasi Buluh di Kawasan Sungai Ular Kecamatan Pegajahan Kabupaten Serdang Bedagai

Abstract

Efficiency of water distribution is percentage of water that flow into the rice field compared to the amount of water entering from river. The efficiency can be calculated by multiplying the efficiency of primary, secondary and tertiary channels. Efficiency of water distribution is affected by the seepage, percolation and evaporation. It was found from the research conducted in the irrigation area of Buluh districts Serdang Bedagai that the efficiency of water distribution was 36,22% while the efficiency in the primary channel was 80,21%, the secondary channel was 74,46 % and 60,64 % in the tertiary channel. Water loss from the seepage in the primary channel was 0,0347 l/s , the secondary channel was 0,0187 l/s and 0,0009 l/s in the tertiary channel, from the percolation was 4.00 mm / day and from the evaporation was 1,158 mm / day.