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| 基于DEM和土地利用的水土流失风险评价——以桂林寨底地下河流域为例 | |
| 引用本文： | 蔡德所,李荣辉,王魁,尹辉,玉宏.基于DEM和土地利用的水土流失风险评价——以桂林寨底地下河流域为例[J].中国水土保持,2012(3):29-31,76. |
| 作者姓名： | 蔡德所 李荣辉 王魁 尹辉 玉宏 |
| 作者单位： | 1. 广西大学土木建筑工程学院,广西南宁,530004 2. 广西大学土木建筑工程学院,广西南宁530004;广西壮族自治区水利科学研究院,广西南宁530023 3. 中国地质科学院岩溶地质研究所,广西桂林,541004 |
| 摘 要： | 以2009年寨底地下河流域WorldView-1遥感影像、SPOT5卫星影像、1∶1万数字化地形图和寨底行政区划图为基础资料,在RS和GIS技术支持下,选取土地利用方式、植被覆盖度、坡度和高程作为水土流失风险评价指标,对寨底地下河流域水土流失进行了风险评价。结果表明:寨底地下河流域中风险和较高风险水土流失面积分布较广,中风险水土流失面积10.35 km2,占研究区面积的31.46%;较高风险20.89 km2,占63.50%。此研究结果为该流域开展水土保持生态建设提供了科学依据。 |
| 关 键 词： | 水土流失 土地利用方式 风险评价 岩溶区 寨底地下河流域 广西 |
Evaluation on Soil and Water Loss Risk Based on DEM and Land Use |
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| Institution: | CAI De-suo1,LI Rong-hui1,2,WANG Kui1,et al.(1.Guangxi University,Nanning,Guangxi 530004,China;2.Guangxi Institute of Hydraulic Research,Nanning,Guangxi 530023,China)(29) |
| Abstract: | Based on GIS and RS,the paper conducted risk evaluation on soil and water loss of Zhaidi underground river basin by taking Worldview-1 remote sensing images,SPOT-5 satellite images,1 ∶10 000 digital topographic map and Zhaidi administrative map as basic data,choosing land use type,vegetation coverage,slop,elevation as evaluation indexes of soil and water loss.The outcomes show that the distribution of moderate and higher risks of soil and water loss area in Zhaidi underground river basin is wider,of which,the soil and water loss area in moderate risk is 10.35 km2,making up 31.46% of the studied area and the area in higher risk is 20.89 km2,making up 63.50%.The results have provided scientific basis for soil and water conservation ecological building of the basin. |
| Keywords: | soil and water loss land use type risk evaluation karst area Zhaidi underground river basin |
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