圖書典藏及影音數位平台

水利署已完成全臺各縣市及流域之淹水潛勢圖更新，為求淹水潛勢資料加值分析，在考慮人文社會、經濟活動、土地利用、淹水損失…等相關因子下，將逐步評估全臺脆弱度及風險度。同年至民國100年，本署以「水災危險度、脆弱度與風險圖製作技術手冊」為基礎，完成高雄、屏東、臺南、嘉義等地區之製作示範計畫。預計未來2年持續完成全臺水災危險度、脆弱度及風險地圖製作示範，並於民國102年進行圖資整合與應用規劃。

There are three to five typhoons to attack Taiwan annually. Flooding disaster induced by the torrential rain of typhoons is one of the major natural disaster in Taiwan that causes the losses of people’s life and property. Recently, climate change is becoming more significant and the extreme weather events will frequently happen in the future. In order to minimize flooding disaster, Water Resources Agency (WRA) has completed inundation potential maps of Taiwan in recent years and announced these maps for public. Recently, inundation disaster often occurred in some highland townships where are not in the simulation area with the elevation less than 50 m. Therefore, the project will build a highlands inundation model that can simulate subcritical, supercritical and transcritical flows to meet the hydraulic characteristics of the mountainous terrain changes, and the inundation potential maps of highland townships are finally produced. In 2009, WRA has reached the goal of flood risk map and vulnerability map based on advance research, flood maps and the development of our country. Based on the contribution of "a study of methodology for analyzing vulnerability and risk maps" and "The handbook of flood vulnerability and hazard map process", this project will build the flood hazard, vulnerability and risk maps of Tamsui River, Sulfur Creek, Lanyang Creek, Fengshan Creek, Touqian Creek, Zhonggang Creek, Houlong Creek, Yilan County, Keelung City, Taipei City, New Taipei City, Taoyuan County, Hsinchu County, Hsinchu City and Miaoli County. The results of this project could give more effective and practical information to governments for making correct decisions. This project produces flood risk maps on the basis of two hydrological conditions, including the most severe historical flood events and the designed 100-year return-period rainfall events. All flood risk maps contain life-oriented and property-oriented productions. In the present project, there are 8 countries to be executed and a total amount of 16 life-oriented and 16 property-oriented flood risk maps, 16 life-oriented and 16 property-oriented flood hazard maps, and 8 life-oriented and 8 property-oriented flood vulnerability maps is produced. Additionally, this project has produced the highland inundation maps of Taipei City’s Muzha, New Taipei City’s Ruifang Dist., Xindian Dist., Yingge Dist. and Sanxia Dist., Yilan County’s Dongshan Township and Su’ao Township and Miaoli County’s Shitan Township. The products include 30 highland inundation maps based on 24, 48, 72-hr rainfall with 10 return periods (1.1 years, 2 years, 5 years, 10 years, 20 years, 25 years, 50 years, 100 years, 200 years, 500 years), 12 highland inundation maps based on 24, 48, 72-hr rainfall with fixed amount rainfall (200mm/day、350mm/day、450mm/day、600mm/day). There are totally 287 maps for highland inundation in this project.