广西岩溶地区土壤侵蚀变化遥感监测——以“珠治”工程广西项目区河池片区为例

采用RS、GIS技术,以通用土壤流失方程为基础,对"珠治"工程广西项目区河池片区进行了土壤侵蚀遥感监测,定量研究了治理措施实施后岩溶地区的土壤侵蚀变化规律。结果表明:治理后土壤侵蚀得到了遏制,土壤侵蚀总量从治理前的311 848 t减少到治理后的284 877 t,减少了8.65%,其中剧烈侵蚀的侵蚀量和侵蚀面积减少最为明显;土地利用方式对土壤侵蚀影响明显,其中未利用地、耕地的土壤侵蚀最为严重,林地、草地对土壤侵蚀的发生具有减弱作用。

Remote Sensing Monitoring on Soil Erosion Variations of Karst Area in Guangxi

The paper conducted remote sensing monitoring on soil erosion of Hechi region of Guangxi project area of "Integrated Treatment of Soil and Water Conservation in Limestone Area of Nanpan River and Beipan River in the Upper Zhujiang River Project" and quantative studied the variation law of soil erosion in karst area after implementing treatment measures by using RS and GIS technology and taking USLE as a basis.The outcomes show that: a) the soil erosion has been effectively controlled after treatment and the total quantity of soil erosion reduced from 311 848 t before the treatment to 284 877 t after the treatment,reducing 8.65%,of which,the reduction of amount and area of severe erosion are the most obvious and;b) the influence of land use type to soil erosion is remarkable,of which,the soil erosion of unused land and arable land are the most prominent and woodlands and grasslands have the function of reducing soil erosion.