Performance assessment of irrigation system using indicators for decision making / Rizal Syahyadi

Syahyadi, Rizal (2012) Performance assessment of irrigation system using indicators for decision making / Rizal Syahyadi. Masters thesis, University of Malaya.

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Abstract

Food security is a situation that exists when all people, at all times, have physical, social, and economic access to sufficient, safe, and nutritious food that meets their dietary needs and food preferences for an active and healthy life. However a billion people globally do not have adequate food to meet their basic nutritional needs and the world faces a potentially even greater crisis as the global population is expected to grow from about 6.9 billion (in 2010) to more than 9 billion by the mid-century. Agriculture remains the largest employment sector in most developing countries and international agriculture agreements are crucial to a country's food security. Indonesia is an agricultural country where most of the population consumes rice as a major part of their diet. To ensure the efficient performance of agricultural and for sustainability in output systems, a proper technical irrigation system has to be in place. Technical irrigation projects in Indonesia have been developed in all the three categories of service areas of less than 1000 ha, 1000 ha to 3000 ha and above 3000 ha, with management responsibilities distributed from district, province and national levels respectively. The Pante Lhong technical irrigation system has system area of above 3000 ha. This study involves the assessment of the performance of technical irrigation system in Aceh, Indonesia, namely the Pante Lhong technical irrigation system The Pante Lhong technical irrigation system performances were evaluated using measured/rewarded/collected internal and external indicators that covered different aspect of evaluation. The Rapid Appraisal Process (RAP) is a visual assessment tool was used to evaluate the internal indicators performance. The selected indicators were grouped in terms of actual water delivery service performance and infrastructure maintenance. The four sub indicators under the performance of water delivery service indicators consists of flexibility, reliability, equity and control of flow to the customers/farmers. Likewise, four sub indicators under the performance of infrastructure maintenance indicator consists of floor and canal bank, seepage, level of gate maintenance and available of proper equipment and staff. The external indicators were crop yield and production cost. The data of crop yield and production cost arecollected from the farmers in the three regions which were upstream, middle stream and downstream. Data were collected through field observation and face to face interviews with the irrigation staff and the farmers. The production cost data were calculated based on the land preparation cost, growth stage cost (maintenance, fertilizer and insecticide) and harvesting cost. The results for the infrastructure maintenance indicators showed that the current canal network received 74.25 % of the expected infrastructure maintenance. This value demonstrated a sufficient routine maintenance for canal network by the irrigation authority. The results also found that the continuous supply method is quite enough to excellent performance of flexibility, reliability and equity of water distribution. However, the control flow to farmers in the next level at third canal/tertiary level and measurement of volumes delivered at final delivered sub components had performed at worse than expected. In the crop yield indicator, the average maximum productivity was 3.91 ton/ha and the income generated was Rp.11.730 million rupiahs/ha (US$ 1289/ha). The total production cost of the Pante Lhong technical irrigation system was Rp. 4.126 million rupiahs/ha (US$ 453.50/ha) and hence in term of return of investment (ROI), it is still profitable and feasible to be developed for the farmers.

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