Development of the Flood Warning Criteria for gricultural Crops －A Case Study of Short-term Leaf Vegetables in Yunlin Siluo and Erlun Areas

• Main Authors: Yu-Jen Chang, 張佑任
• Other Authors: Yih-Chi Tan
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/npag6y

碩士 === 國立臺灣大學 === 生物環境系統工程學研究所 === 103 === In Taiwan, Leafy vegetables from short-lived herbaceous plants have high production in summer. However, the fragile leaves of these vegetables will suffer from Typhoon and heavy rainfall. Owing to the increase in extreme weather events in recent years, frequent flood disasters caused by heavy rainfall result in significant decrease in the production of leafy vegetables. Under such circumstance, we aim at developing an approach to study the impact of flooding on the production of leafy vegetables and also apply the proposed model to the agricultural areas in Yunlin, Taiwan. In addition to provided records of natural disaster financial assistance, inundation depth and time in several real flood events are computed based on a two-dimensional inundation model. The formulation among the inundation depth and time, records of natural disaster aid and decrease in production of leafy vegetables is therefore established by virtue of the logistic regression. Furthermore, risk maps of decrease in production of leafy vegetables at any rainfalls can be presented through the established formulation. Depending on the risk maps, a warning rainfall criteria is proposed to conduct a risk assessment of decrease in production of leafy vegetables in Yunlin in this study.