| A GIS-based method for flooded area calculation and damage evaluation |
| |
| 作者姓名： | LIU Ren-yi LIU Nan |
| |
| 作者单位： | The Zhejiang Provincial GIS Lab，Zhejiang University，Hangzhou 310028，China |
| |
| 基金项目： | Project of National Ninth Five-Year Plan, 96-D042 |
| |
| 摘 要： | 1 IntroductionFlooding simulation and damage evaluation has attracted attention in environmental disaster research fields for many years. Since the 1990s, especially in recent years, using geographic information systems (GIS) technology and its powerful functions of spatial analysis and visualization to simulate and display flooded area and to evaluate disaster damage has become a research hotspot. Most of the papers involved in this field are from hydraulic and hydrologic point of view and b…
|
| 收稿时间： | 2000-10-15 |
A GIS-based method for flooded area calculation and damage evaluation |
| |
| LIU Ren-yi,LIU Nan.A GIS-based method for flooded area calculation and damage evaluation[J].Journal of Geographical Sciences,2001,11(2):187-192. |
| |
| Authors: | Liu Ren-yi Liu Nan |
| |
| Institution: | The Zhejiang Provincial GIS Lab, Zhejiang University, |
| |
| Abstract: | Using geographic information system to study flooded area and damage evaluation has been a hotspot in environmental disaster research for years. In this paper, a model for flooded area calculation and damage evaluation is presented. Flooding is divided into two types: 'source flood' and 'non-source flood'. The source-flood area calculation is based on seed spread algorithm. The flood damage evaluation is calculated by overlaying the flooded area range with thematic maps and relating the result to other social and economic data. To raise the operational efficiency of the model, a skipping approach is used to speed seed spread algorithm and all thematic maps are converted to raster format before overlay analysis. The accuracy of flooded area calculation and damage evaluation is mainly dependent upon the resolution and precision of the digital elevation model (DEM) data, upon the accuracy of registering all raster layers, and upon the quality of economic information. This model has been successfully used in the Zhejiang Province Comprehensive Water Management Information System developed by the authors. The applications show that this model is especially useful for most counties of China and other developing countries. |
| |
| Keywords: | model flooded area calculation damage evaluation seed spread algorithm |
| 本文献已被 CNKI 万方数据 SpringerLink 等数据库收录！ |
| 点击此处可从《地理学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《地理学报(英文版)》下载免费的PDF全文 |
