Primary Analyse of Reducing Flood Effect of Different Vegetation Cover in Small Watershed of Disaster Prone Area Based on GIS:A Case Study in Upper Minjiang River Basin
A favorable eco-environment has a function of reducing flood,while vegetation cover is an impor-tant index to measure the eco-environment quality.Researching on small watersheds,using grey correlation analysis and statistical method combined with GIS,this paper analyze how various vegetation types and different vegetation cover reduce flood in upper Minjiang river basin.The results show that:(1)Generally the potential risk of flood in upper Minjiang river basin is relatively high,and exists spatial difference,the high value is mainly distributed in middle and lower reaches of main channel of Minjiang river and its first tributaries,the low value is mainly distribu-ted in upper reaches of main channel of Minjiang river and region of Xiaoxinggou,Heishuigou and so on;(2)Ac-cording to the actual happens of disasters,vegetation in the region have flood reduction ability,there is an associa-tion between flood reduction ability and potential risk of flood;(3)Under different vegetation types and coverage, flood reduction ability is different,and there is a different degree of correlation with coverage.
disaster prone areaGISsmall watershedvegetation coverability of reducing floodupper Minjiang river basin
国家科技期刊平台
NSTL
万方数据
维普
