The Simulation of Pond Rotation Irrigation System in Taoyuan

• Main Authors: Liang-wei Hsu, 許良瑋
• Other Authors: Ray-shyan Wu
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/73152624797369727398

碩士 === 國立中央大學 === 土木工程研究所 === 99 === This research investigated the influence of irrigation water requirement with pond irrigation operation. The pond irrigation system has the advantage of regulate irrigation water. Tao-Yuan Channel #2 Feeder is selected as the study area. The irrigation water resources included Shih-men reservoir, Nankan stream and Puxin stream. The pond irrigation system model was established by adapting Vensim model and the irrigation water record in 2003 and 2007 were applied. Simulations of various irrigation management approaches are used to estimate the significance of pond irrigation system. The simulation was formulated into three cases: (1) pond operated, (2) pond partial operated, (3) pond closed irrigation system. For cases of insufficient water supply, the result shows that pond irrigation system can reduce the burden of canal supply and the risk of shortage significantly. The hydrologic pattern changes due to climate change increases the difficulty in irrigation system management. The study compared the performance of the rotation irrigation approach and that of the continuous irrigation approach during drought period. Assuming that both the water supply and irrigation area are reduced in order to maintain normal cultivation days during no rainfall condition, the result shows the rotation irrigation approach outperformed the continuous irrigation method. Given the case that the irrigation area is reduced to 60% for all irrigation sections during the dry season, both the without pond irrigation system and the pond partial operated system were able to keep normal crop cultivation for only 11 out of 38 irrigation sections. However, In the case of the pond operated system, 28 irrigation sections were kept normal crop cultivation. Therefore, the strategy of reducing irrigation area with the pond operated system can help in keeping normal cultivation days for the majority of irrigation area. In conclusion, the pond irrigation system has positive effect on relaxing the climate change impact on water resource management.