A GIS-based method for flooded area calculation and damage evaluation
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.
Key wordsmodel flooded area calculation damage evaluation seed spread algorithm
CLC numberP426.616 X43
Unable to display preview. Download preview PDF.
- Cera T B, Tremwel, T K, Burleson R W. Use of ARC/INFO, EPA-SWMM and UNIX text processing tools to determine flood extent.American Water Resources Association Technical Publication Series, 1996, 407–416.Google Scholar
- Di Giammarco P., Todini E, Consuegra Det al. Combining a 2-D flood plain model with GIS for flood delineation and damage assessment,Proceedings of the Specialty Conference on Modelling of Flood Propagation Over Initially Dry Areas, New York: ASCE. 1993, 171–185.Google Scholar
- Ke Zhengyi, He Jianbang. Digital Terrain Model. Beijing: China Science and Technology Publishing House, 1993, 51–67.Google Scholar
- Liu Xue, Wang Xingkui, Wang Guangqian. Research on spatial process simulation and modelling based on GIS.China Image and Graph Bulletin, 1999,4: 476–480.Google Scholar
- Marinelli L, Michel R, Beaudoin Aet al. Flood mapping using ERS tandem coherence image: a case study in southern France, ESA SP, 1997,414: 531–536.Google Scholar
- Wu Honghai. VR-GIS technology and applications (academic degree dissertation). Hangzhou: Zhejiang University Press, 2000. 24–35.Google Scholar
- Liu Nan, Liu Renyi. Research on model of flood area display and damage evaluation. In: Research Report for the Zhejiang Provincial DEM and Flood Disaster Simulation System Project, Hangzhou: Zhejiang University Press, 1999, 412–445.Google Scholar
- Zhou Chenghu. Research on Flood Damage Evaluation Information Systems. Beijing: China Science and Technology Publishing House, 1993, 58–85.Google Scholar