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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。
Based on the data of WorldView-1 remote sensing images, SPOT5 satellite images, 1: 10000 digital topographic maps and the administrative divisions of the bottom of the archipelago in the underground river basins in 2009, the land use patterns and the vegetation cover were selected based on RS and GIS technologies Degree, slope and elevation as risk assessment indicators of soil erosion, the risk assessment of soil and water loss in the underground river basins in the Walled. The results showed that the area of risk and high-risk soil erosion in the subterranean river basins is widely distributed. The medium-risk soil erosion area is 10.35 km 2, accounting for 31.46% of the study area. The higher risk is 20.89 km 2, accounting for 63.50%. The results of this study provide a scientific basis for the ecological construction of soil and water conservation in this basin.