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Abstract:
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The availability of water, the water requirement and how to divide the water as far as possible a fair and equitable so that all plants can grow well is needed to increase production. The availability of water, the need for water and how to divide the existing water As far as possible fair and evenly so that all the plants can grow very well Needed to improve production. Analysis of Irrigation Water needs is one of the important stages required in the planning and management of irrigation systems. Increasing pressure on available water resources for irrigation and other needs, particularly during dry season, requires an irrigation network having a higher level of efficiency to deliver irrigation water.This study aims to determine the delivery efficiencies and amount of water loss in secondary and tertiary channels of selected irrigation network. Irigation CanalSimangu was selected for the study area. Results showed that average delivery efficiency for irigation CanalSimangu was 52.47%. The average water loss and water delivery efficiency in secondary channel were 0,048 and 81,11%, respectively. The loss was caused by evaporation 2.73 x 10-7 m3/s, seepage 0.7 m3/s and other factors 0.04548 m3/s. The average water loss in tertiary channels was 0,01 m3/s contributed by losses from evaporation 5.046 x 10-8 m3/s, seepage 0.00033 m3/s and other factors 0.00994 m3/s. It caused tertiary channel's water delivery efficiency was approximately 71,88%. However, performance of irrigation network was classified as good since it has water delivery efficiency greater than 60%. Water loss in tertiary channel largely due to many parts of wall and base of the channels were broken, and the presence of vegetation and sediment in the channel slowed the water flow. |