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The natural or artificial water supply into soil with the aim of giving the moisture that is necessary for crop growth is called irrigation. An irrigation structure is the water structure system from upstream to downstream that consists of the weir (intake gate), the channel, and the division box. The weir has the function of raising the water level by opening and closing the gate that controls water flow into the channel; the division box divides the water to fulfill the need for water of the crop in the paddy. Irrigation is very important for supplying water for agriculture. Irrigation management generally only includes the participation perspective or qualitative condition; however in this research, the dependable discharge is analyzed mainly for its quantitative support of irrigation management. To fulfill the need for water for agriculture, the irrigation water has to be proportionally given; otherwise, the crop growth will be disrupted, and this will have implications for agricultural production. For this reason, this research is intended to investigate and analyze the dependable discharge as to the water availability and crop water needed for the agriculture production yield in the Molek S irrigation area, Jatigui Village, Sumber Pucung District, Malang Regency, Indonesia, which is related to the participation perspective in managing the Secondary S Molek irrigation management. For an area of 160 ha, the paddy utilizes irrigation water from the Molek main channel, which is sourced from the weir at Blobo. The results of the analysis can give an illustration of the potency of the water supply that can be carried out continuously without falling to the ratio of the lowest mean crop water requirement of 60.44%; the ratio of the highest mean crop water requirement is 69.85%. |
