Efisiensi Penyaluran Air Irigasi di Kawasan Sungai Ular Daerah Irigasi Bendang Kabupaten Serdang Bedagai

Abstract

HERRY MICHAEL SARAGIH: The Efficiency of Water Irrigaton in Sungai Ular, Bendang Irrigation Area Serdang Bedagai Regency, supervised by Edi Susanto and Ainun Rohanah. The efficiency of water irrigation channeling is the comparison of the amount of water used by crop and the amount of water available in percentage. During channeling of water from the watergate to the ricefield, water is loss in primary, secondary, and tertiary drain due to evaporation, seepage and percolation. To fulfill water irrrigation, the rate of water must be enough to be flowed into each drain in the rice field. Therefore, the measuring of rate is needed so that the water channeling can be used efficiently. This research was done on September in Bendang Irrigation Area, by measuring the incoming rate and the exit rate in each drain using floating ball. Result showed that the efficiency on the primary drain was 82.32 %, in secondary drain was 66.15 %, and in the tertier drain was 83.32 %, so that the efficiency of Bendang Irrigation Area was equal to 45.92 %