Study of Irrigation Water Supply Efficiency to Support the Productivity of Farmers (Case Study at Kobisonta North Seram Central Maluku District)

The need of water is a major media of irrigation in order to support the effectiveness of agricultural business which is manifested as the supporting of food provision. The purpose of this study is to analyze the amount of discharge in each channel and the efficiency in Kobisonta irrigation area, Seti North Seramsubdistrict, Central Maluku district with area of 3,150 ha. The study was conducted on secondary channels Kobisonta includes BKS7, BKS8, BKS9, Kobisonta Secondary Channel includes BKS10, BKS11, BKS12 and Seti Secondary Line includes BS1, BS2 and BS3 The water debit requirement in the rice field and the efficiency in the irrigation area of Kobisonta was analyzed by using the incoming debit - discharge method based on flow velocity measurement. Providing irrigation water for efficiently is not simple because many factors affect the way and the process, besides that if the water supply and irrigation on the channel is inefficient, then it can reduce or decrease agricultural productivity. From the result of actual debit analysis on channel BS3, BKS9, BKS11, and BKS12, they are able to meet therequirement of irrigation water thoroughly in irrigation area. In BS1, BS2, BKS8 and BKS10 channels, actual discharge has not been able to meet the irrigation water needs in its irrigation area. The efficiency of irrigation channels in Kobisonta Irrigation Area varies by channel. According to the efficiency standard by the Directorate General of Irrigation, the secondary Saluaran in Irrigation Area is categorized as efficient where for BKS7 is 90%, BKS8 is 97% and BS2 is 91%.