Optimasi Pemanfaatan Air Di Daerah Irigasi Siman, Kabupaten Jombang (Studi Kasus Pada Wilayah Di Siman Mojoagung)
Year: 2026
Type: article
Abstract: The Siman Mojoagung Irrigation Area in Jombang Regency serves 1,031 ha. This study compared the existing cropping-pattern water requirement in the Global Cropping Plan with available discharge, developed alternative patterns, estimated irrigation requirements using a climatological method, and selected the best alternative through a water-balance analysis. Rainfall, climatological, intake-discharge, cultivated-area, and cropping-plan data were analyzed for ten-day periods. The existing-plan Water Balance showed deficits in 35 of 39 periods, with a maximum deficit of 2,380.88 L/s. Eight alternative cropping patterns were evaluated. Their maximum requirements during critical periods ranged from 793.26 to 1,383.03 L/s. Alternative VII—rice–maize–maize with year-round sugarcane—required a maximum of 970.62 L/s. The seasons begin in the first ten-day periods of January, May, and September, covering 901 ha, 700 ha, and 60 ha, respectively, with 130 ha of sugarcane. Its Water Balance produced five deficit periods, a maximum deficit of 323.03 L/s, and an annual deficit volume of 928,213.89 m³. Alternative VII required 15 pumps and generated the highest agricultural revenue after pumping costs, amounting to IDR 81,694,553,679.26 per year; therefore, it was selected as the best cropping pattern.
Author: Sitorus, Chatarin Von Dora
Institution: Universitas Negeri Surabaya
Language: English
Subfield: Soil Science
Domain: Life Sciences
Open Access status: hybrid
OpenAlex ID: W7221905141
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