莲华池集水区水文敏感区动态变化之研究-台湾大学地理环境资源学系.PDF

21-46 (2008) 21 JOURNAL OF GEOGRAPHICAL SCIENCE (51) : 21-46 (2008) Dynamic Change of Hydrologically Sensitive Areas in the Lien-Hwa-Chi Watersheds * ** Yung-Chung Chuang Shyue-Cherng Liaw *** **** Jihn-Fa Jan Jeen-Liang Hwong Abstract The purpose of this research is to study the dynamic change of hydrologically sensitive areas in the Lien-Hwa-Chi watersheds during different seasons. We apply the soil moisture routing model (SMR) to estimate soil saturation degree and probability of runoff generation in the study area, and to analyze the relationship between topographic index and probability of runoff generation. Based on the * 立理 Graduate Student, Department of Geography, National Taiwan Normal University. ** 立理 (e-mail: liaw@ntnu.edu.tw) Associate Professor, Department of Geography, National Taiwan Normal University, Corresponding Author. *** 立 Associate Professor, Department of Land Economics, National Chengchi University. **** 行林蓮 Director, Lien-Hwa-Chi Research Center, Taiwan Forestry Research Institute. 22 relationship, we identify the hydrologically sensitive areas in March, June, September, and December. Results show that the topographic indices in Lien-Hwa-Chi watershed No. 4 and No. 5 range from 2 to 15, and have a positive linear relationship with probability of runoff generation. Through the application of SMR, the soil saturation