STUDI ANALISIS KEBUTUHAN AIR DENGAN CROPWAT 8.0 & PERSEDIAAN AIR DENGAN METODE FJ.MOCK DAERAH IRIGASI BANYULANGSE KECAMATAN SEMANDING KABUPATEN TUBAN
Abstract
The Banyulangse Irrigation Area in Semanding District, Tuban Regency, covers 867.73 ha and experiences water shortages during the dry season. This study analyzed irrigation water requirements, water availability, and the water balance using CROPWAT 8.0 (Penman–Monteith) and the F.J. Mock method based on rainfall and climatological data. The highest irrigation water requirement was 1.929 L/s in the third period of April and the lowest was 0.061 L/s in the third period of August, totaling 14 L/s annually. Water availability ranged from 0.275 to 3.200 L/s, with an annual total of 41.649 L/s. Water deficits occurred in the third period of October and the first and second periods of December but were mitigated through rotational irrigation scheduling under the paddy–paddy–crops.
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