Analysis of hydraulic sluice gate Sapon – intake in Progo river Special Region of Yogyakarta

Abstract

Progo River is water source from one of the harvests to irrigate Special Region of Yogyakarta irrigation network. Sapon, which has an area of 2250 Ha, received the water from Progo through Sapon intake. To fulfill the water requirement for Sapon irrigation area according to the demand of water debit based on the water needs of System Planning (August - Jul planting pattern) and Alternative water supply (Oct - Sep), it is necessary to operate the technique on the door Sapon intake by analyze the Sapon intake watergate in terms of hydraulics. The method used was field observation by conducting interviews and hydraulic analysis of watergate by analyzing water door height (ha). From the analysis, the results has shown, four door openings are not necessary because one, two and three door openings meet the requirements for operational intake doors with high door openings <h (height of intake holes). The operation of intake doors based on the water demand system planning (August - Jul planting pattern) is more efficient than the intake door operation based on alternative water demand (Oct - Sep). From the results can be concluded that Sapon intake capable of flowing water following the required discharge.