Regional flood disaster assessment is an important content for flood disaster estimate and management. According to disaster system theory, using GIS method, through comprehensive analyzing some impact degrees of factors to flood disaster, such as rainfall, terrain, water systems, passing flood and flood prevention projects, as well as impact degrees of the factors to potential losing extents when encountering flood disaster, ecological risks of flood disaster were assessed and analyzed synthetically by applying to analytic hierarchy process and factorial overlay methods from two sides of natural and social attribute. The results show that risk of flood disaster declines gradually from center to two sides around main stream of the lower reaches in the Weihe River as a whole. That is, the closer to main stream, the higher the risk. From administrative divisions, Xi’an City and Lintong District are in high risk zones, Hua County, Huayin City and Tongguan County are in low risk zones.
LI Xie-hui, WANG Lei, TAN Ling-zhi, ZHENG Yi
. Study on Regional Risk Assessment of Flood Disaster in Catchment Area along Weihe River[J]. SCIENTIA GEOGRAPHICA SINICA, 2009
, 29(5)
: 733
-739
.
DOI: 10.13249/j.cnki.sgs.2009.05.733
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