| dc.description.abstract | In recent years, under the influence of climate change, extreme weather has occurred frequently around the world, and Taiwan is no exception. Water resources that are already difficult to allocate have become more difficult in such situations. In 2020, there will be no typhoon invading Taiwan in summer in Taiwan, and the lack of water resources will lead to the partial suspension of irrigation of farm water. However, because of the special terrain in Taiwan′s Taoyuan area, there are many irrigation systems consisting of ponds in the area, which can be regarded as water resources provided by several small reservoirs during irrigation. This study takes the tenth branch line of Taoyuan Canal as the research area, and uses the system dynamics model VENSIM to establish an irrigation system, evaluate the overall irrigation capacity of the pond irrigation system through a model, and simulate the use of precision drip irrigation to reduce irrigation water volume in rice fields with high water consumption, couple the pond irrigation system to cope with water shortage in water shortage years, and determine the proportion of farmland area that needs to be replaced with precision drip irrigation system.
According to the simulation results, if all the water storage capacity of the ponds can be effectively used in the first phase of 2020, the water shortage in the irrigation area will be greatly reduced. In the second phase of 2020, the canal water supply is only about 27% of the planned water supply and the water supply has not been stopped 45 days after the operation. Even if the water storage capacity of the pond is fully used, the situation of water shortage in the irrigation area can not be avoided. If we simply increase the effective capacity of the ponds to cope with the water shortage in the second phase of 2020, in total, the depth of water is about 1.3 million cubic meters. If the five irrigation areas with poor regulation and storage capacity are changed from rice fields to precision drip irrigation vegetables, the planting area is about 34.09%. Even if the water supply is not increased, only four irrigation areas in the remaining irrigation areas have sporadic water shortage. It is suggested that we can actively promote the cultivation of more water-saving crops with water-saving irrigation measures, and the deep irrigation area with poor regulation and storage capacity. | en_US |