Application of Existing Irrigation System for removing Suspended Sediment to meet On Farm Irrigation Water Demand - A Scheme of Mitigating Groundwater Withdraw

• Main Authors: Chien-Ming Sung, 宋建明
• Other Authors: Jin-Hwua Chen
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/7turyx

博士 === 國立屏東科技大學 === 土木工程系所 === 100 === This research deals with the dynamic simulation modelling of a round irrigation paddy logging system and analysis of potential sustainable water resource allocation management policies in the Jhuoshuei River.The study region consists of a round irrigation paddy and its surroundings, where agriculture is a major commercial activity. The agricultural land is often lack of water, resulting in no irrigation in the dry season. The goal of this research is to find a balance between the paddy logging system and economic activities in the region. To this end, a system dynamics model of the water paddy logging system is constructed. The results obtained from model simulations show that there is enough water to supply irrigation in the near future.The major problem seems to be a potential decline in the welfare of the farmers, mainly due to unsustainable water supply. Different scenario runs reveal that the paddy would have become supply water from Water Logging Paddy Field dominance, if the subsidy has continued long fallow fields. Fallow fields can have storage in 2010. One particular scenario analysis (the fallow paddy to supply water sometime in the dry season within the model time frame) results in increase in paddy harvest; hence in income from cabbage, leading to betterment in social conditions. As for the alternative policies tested, improved agricultural techniques(use aquifer on Interflow) is the only policy that leads to better social conditions, through increased yield per hectare. It is hoped that the dynamic simulation model will serve as a laboratory to study the different features of the lack water problem in shallow freshwater Water Logging Paddy Field and to analyse different policy alternatives with an integrated, systemic approach.