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A GIS-based method for flooded area calculation and damage evaluation
- Source :
- Journal of Geographical Sciences. 11:187-192
- Publication Year :
- 2001
- Publisher :
- Springer Science and Business Media LLC, 2001.
-
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: ‘soruce 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 ara range with thematic maps and relating the results 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.
- Subjects :
- Hydrology
Geographic information system
Flood myth
business.industry
Overlay
computer.file_format
Management information systems
Economic data
Thematic map
Earth and Planetary Sciences (miscellaneous)
Environmental science
Raster graphics
business
Digital elevation model
computer
Remote sensing
Subjects
Details
- ISSN :
- 18619568 and 1009637X
- Volume :
- 11
- Database :
- OpenAIRE
- Journal :
- Journal of Geographical Sciences
- Accession number :
- edsair.doi...........8748bfdde9b5a7304c363064a3fcdd84