基于遥感和GIS的水土流失动态监测——以河北省赤城县为例  

Dynamics of water and soil loss based on remote sensing and GIS:A case study in Chicheng County of Hebei Province

作　　者：李晓松[1] 姬翠翠[1,2] 曾源[1] 闫娜娜[1] 吴炳方[1] 

机构地区：[1]中国科学院遥感应用研究所,北京100101 [2]辽宁工程技术大学测绘与地理科学学院,辽宁阜新123000

出　　处：《生态学杂志》2009年第9期1723-1729,共7页Chinese Journal of Ecology

基　　金：中国科学院知识创新工程重大项目资助(KZCX1-YW-08-03)

摘　　要：以遥感和GIS技术为支撑,利用修正后的通用土壤流失方程RUSLE为评价模型,对河北省赤城县1990、2000年的土壤侵蚀量进行了计算,并结合水土流失强度分级标准,生成了赤城县水土流失强度分布图。在此基础上,对赤城县2000年的水土流失现状、空间分布及1990—2000年水土流失的变化及原因进行了分析。结果表明:赤城县2000年平均土壤侵蚀模数为17.64 t.hm-2.a-1,属于轻度侵蚀,水土流失区域主要集中在灌草地与旱地这两种土地利用类型;与1990年相比,赤城县2000年水土流失面积明显减少,减少面积达839.81 km2。由此可见,赤城县在1990—2000年期间水土流失治理效果显著。With the support of remote sensing and GIS, the soil erosion amount in Ghieheng County of Hebei Province in 1990 and 2000 was calculated by using the revised universal soil loss equation （RUSLE）, and a soil erosion map was drawn according to the soil erosion intensity classification criterion. Based on these, the status and spatial distribution of water and soil loss in 2000 and the dynamis and causes of the loss in 1990-2000 were analyzed. In 2000, the average soil erosion modulus in the County was 17.64 t · hm^-2 · a^-1, belonging to mild erosion, and the water and soil loss mainly occurred on the hillside scrubland, grassland, and non-irrigated farmland. Comparing with that in 1990, the water and soil loss area in 2000 decreased markedly, with a decrement of 839. 81 km^2, which illustrated that the performed water and soil conservation measures in Chicheng County in 1990-2000 were very effective.

关 键 词：水土流失 土壤侵蚀模数 RUSLE 遥感 GIS 

分 类 号：S157[农业科学—土壤学]