圖書典藏及影音數位平台

美福排水係屬蘭陽溪水系宜蘭河之支流，屬平原地形，其中台9線以東地區高程介於0~2m間，大部分位於低窪易淹水地區，本計畫將以美福排水集水區為範圍建置地表數值高程模型(DEM)資料，並透過淹水數值模式模擬分析淹水狀況，再配合本局100年度「宜蘭縣自計式水位監測系統設立與淹水災損地理資訊系統整合規劃」計畫委託案之淹水分析成果進行驗證，另配合即時雨量資訊及水災潛勢分析，使淹水監測具有預警功能，以利颱洪時掌控即時資訊與研判淹水災情，可搭配宜蘭縣水災保全計畫以提供緊急應變中心水災應變決策之最佳參考

In Taiwan, the methods currently used for flooding area estimation are mainly based on the after-survey of the flood mark. These methods can not reflect the real-time situation of the flooding area, and hence are not able to provide immediate information for damage control. This project aims to extend a previous project of “Planning and construction for an integrated automatic water stage monitoring system and flood damage assessment geographic information system in Yilan County” conducted by the First River Management Office of the Ministry of Economic Affairs in 2011. By incorporating rainfall data in the GIS developed in the previous project, the system is capable of predicting the flooding area. The system now can provide not only the real-time situation in the flooding area, but also the forecast of water stage and area of flooding. The Mei-Fu region is selected as the target area of the project due to frequent flood history of the area. A 5m×5m DEM of the area is utilized for flooding simulation. The model parameters are calibrated using rainfall and flood records. Data from water stage gages are also adopted to verify the simulation result. The final GIS is able to automatically display the forecasted flooding area and water depth in the area.