Enhancing of micro water management in dry season at Dadahup lowland irrigation area

Abstract

The Indonesian government in 2020 initiated a food estate program to revitalize Ex-PLG areas in order to strengthen national food security. Dadahup lowland irrigation area (DIR Dadahup) was part of the food estate program. Water insufficiency during the dry season has been Dadahup's problem to date. The channel's water level during the dry season drops to +0.48 m, which is lower than the average ground level of +1.00 m and +1.30 m at the left and right banks, respectively. This causes stunted growth of the cultivated paddy. The use of gates in secondary and tertiary channels serves to maintain the water level of the channels so that it is possible to irrigate paddy fields whose elevation is +1.00 to +1.20 m. This can be achieved by placing and regulating the opening and closing of the gates with the assistance of flow simulation using the HEC-RAS program.