The Influence Of Operation And Maintenance Activities On Improving The Performance Index of The Downstream Karang Agung Tidal Swamp Irrigation Area, Banyuasin Regency, South Sumatera Province

Karang Agung, Banyuasin Regency, South Sumatra Province, Indonesia is made up of a tidal SIA of 9,777 Ha (PUPR, 2020) at the downstream. The Performance Assessment conducted by the Ministry of Public Works and Public Housing obtained a poor Performance Index (PI) of 44.55 on a scale of 100 (PUPR, 2019). Presently, the Indonesian Government is trying to improve operational performance to obtain better agricultural production in an effort to achieve Rice Self-Sufficiency by determining the irrigation system performance. The components measured include (1) calibration of discharge measurement results, (2) annual water supply, (3) implementation of water distribution and provision, (4) arrangement of gates on the dam, (5) arrangement of mud pockets, and (6) P3A (Farmers Association of Water Users) activities. In 2022, the Performance Value of the Downstream Karang Agung Swamp Irrigation Area (SIA), obtained a NIK (Performance Index Value) of 70.65 after Operation and Maintenance (OM). The water level in the irrigation channel was between 0.1 m and 0.4 m from May to August, with a land pH value of 4 - 5, which was unsuitable for rice plants. Therefore, in May-August, the plants were replaced with horticulture with a planting pattern of 1:2, which increased the OM costs to IDR 1,844,642,214.42. The total amount was obtained from OM budget at 10% with a standard Cost per Ha, which led to a low NPV.