Kajian Koefisien Rembesan Saluran Irigasi Dalam Skala Laboratorium Penampang Trapesium (Studi Kasus Pada Tanah Ultisol)

Abstract

INDRA IFNU : Study of seepage coefficient of trapezoidal cross-section irrigation channel at laboratory scale(a case study on Ultisol soil), supervised by SUMONO and TAUFIK RIZALDI. Seepage is one of the causes of lost of water in irrigation channel. It is difficult to measure the seepage directly on the field. Therefore there should be a model or equation to determine the channel seepage that is the first stage through laboratory scale. This research was done to analyze the seepage coefficient of trapezoidal cross-section irrigation channel on Latosol soil through laboratory scale. The water balance component which was measured were evaporation, percolation and seepage through channel wall. The research showed that the coefficient of seepage was about 1512.89 to 1873.26 mm/day. The evaporation value was 1,33 mm/day and channel percolation was 46.07 mm/day.