以模糊逻辑分析集水区暴雨迳流关系型态之研究AStudyofRelationship.PDFVIP

36(3) 259-270 (2004) Journal of Soil and Water Conservation, 36(3) 259-270 (2004) 邏暴流 益 梁 降暴降量流 年不了暴流量 便流來降降流兩例 暴量流量 便暴流 念 更 邏暴流暴量數 流 量數 論暴流暴流量 流量北 行例 暴流 A Study of Relationship between Rainfall and Runoff of a Watershed Using Fuzzy Logic Analysis Yi-Fa Hung, Sheng Liang Department of Soil and Water Conservation, National Chung-Hsing University, Taichung, 402, Taiwan ABSTRACT Runoffs from heavy rainstorms within a watershed can often turn into severe floods each year in Taiwan. Floods can usually cause heavy damages to property and/or loss of lives at times. To minimize or contain these damages and losses, floods will have to be projected or forecasted. To project or forecast a flood, runoffs will have to be predicted. A clear relationship between runoffs and rainstorms will have to be established as a first step to predict runoffs. Rainfall and runoff appear to be directly and proportionally related. With all key parameters of hydrology and geometry considered, the relationship is in fact nonlinear. Hence, Fuzzy Logic 259 梁邏暴流 appears to be the exact tool for establishing the relationship between rainfall and runoff. The elements of crisp set are 0 and 1, being extremely binary, and no transition zone existed between 0 and 1. But the elements of the fuzzy set are infinite, being multidimensional and closer to the real world. Using fuzzy logic, this paper studies the pattern of rainstorm and runoff within a watershed. Fuzzy logic membership functions of rainstorm and runoff are first created separatel