| 利用植被和地形信息进行水土流失风险度评价 |
| |
| 引用本文： | 周为峰,吴炳方,李苗苗.利用植被和地形信息进行水土流失风险度评价[J].世界科技研究与发展,2005,27(5):51-55. |
| |
| 作者姓名： | 周为峰 吴炳方 李苗苗 |
| |
| 作者单位： | 1. 中国科学院遥感应用研究所,北京,100101;中国科学院研究生院,北京,100039
2. 中国科学院遥感应用研究所,北京,100101 |
| |
| 基金项目： | 中国科学院知识创新项目（No.KZCX3-SW-334）,官厅密云水库上游水土保持监测系统一期工程（HW-STBC2002-01）. |
| |
| 摘 要： | 在影响水土流失过程的众多因素中，选择植被和地形来进行水土流失的风险度评价.试验区域为密云水库上游.利用Landsat-7 ETM＋的影像，在计算归一化差分植被指数NDVI的基础上估算密云水库上游的植被覆盖度;利用栅格数字高程模型DEM，计算地表坡度;根据水利部部颁标准，对植被覆盖度和坡度进行分级.植被覆盖和坡度要素的分级组合形成一个交叉表模型，从而对密云水库上游的水土流失风险情况进行评价并绘制水土流失风险分布图.采用这一方法可以相对快速地度量一个区域水土流失发生的可能性和程度。
|
| 关 键 词： | 水土流失风险 植被覆盖度 地形坡度 区域水土流失 植被覆盖度 地形信息 风险度 评价 Landsat-7 归一化差分植被指数 数字高程模型 水库上游 |
Soil Risk Assessment Using Vegetation and Slope Information |
| |
| ZHOU Weifeng,WU Bingfang,LI Miaomiao.Soil Risk Assessment Using Vegetation and Slope Information[J].World Sci-tech R & D,2005,27(5):51-55. |
| |
| Authors: | ZHOU Weifeng WU Bingfang LI Miaomiao |
| |
| Institution: | 1. Institute of Remote Sensing Applications, CAS, Beijing 100101 ; 2. Graduate School of the Chinese Academy of Sciences, Beijing 100039 |
| |
| Abstract: | The process of soil erosion is complex.Among many factors that influence the process of water and soil erosion,vegetation cover and slope steepness are selected.The vegetation cover data in the Upper Basin of Miyun Reservoir have been estimated by normalized difference vegetation index derived from Landsat-7 ETM+ images.Based on the pixel of DEM slope steepness is computed.Vegetation cover and topographic factor can be combined as a crosstab model.A soil erosion risk map with six grades can be drawn.Using the method the probability and the extent of soil loss can be measured.This information is very useful to watershed manager.This case study describes and assesses soil erosion in the Upper Basin of Miyun Reservoir. |
| |
| Keywords: | crosstab model risk of soil erosion slope steepness |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
