| MODIS数据在土壤侵蚀动态监测中的应用--以湖北省为例 |
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| 引用本文： | 黄艳艳,曾致远,陈少辉.MODIS数据在土壤侵蚀动态监测中的应用--以湖北省为例[J].水土保持通报,2007,27(5):92-95. |
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| 作者姓名： | 黄艳艳 曾致远 陈少辉 |
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| 作者单位： | 华中科技大学,水电与数字化工程学院,数字流域科学与技术湖北省重点实验室,湖北,武汉,430074 |
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| 基金项目： | 湖北省水利厅"湖北省水土保持监测网络与信息系统项目" |
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| 摘 要： | 以动态监测湖北省土壤侵蚀为例，采用三要素（即植被覆盖度、地形坡度和土地利用）专家规则模型，应用MODIS遥感影像进行土壤侵蚀强度快速估测。首先，利用MODIS数据和植被指数模型提取省内的植被覆盖度信息；其次，利用人工解译的TM影像获取土地利用图；然后，利用DEM数据生成坡度图；最后，结合土壤侵蚀强度分级指标，将这3图叠加，判断和计算侵蚀强度等级，获得省内土壤侵蚀强度等级图。运用GIS技术，通过对2004年和2005年的土壤侵蚀强度等级图分析比较，从而实现动态监测。
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| 关 键 词： | 植被覆盖 土壤侵蚀 动态监测 |
| 文章编号： | 1000-288X（2007）05-0092-04 |
| 收稿时间： | 2007/5/20 0:00:00 |
| 修稿时间： | 2007-05-20 |
Application of MODIS Data on Soil Erosion Dynamic Monitoring in Hubei Province |
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| HUANG Yan-yan,ZENG Zhi-yuan and CHEN Shao-hui.Application of MODIS Data on Soil Erosion Dynamic Monitoring in Hubei Province[J].Bulletin of Soil and Water Conservation,2007,27(5):92-95. |
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| Authors: | HUANG Yan-yan ZENG Zhi-yuan and CHEN Shao-hui |
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| Institution: | College of Hydropower and Information Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China |
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| Abstract: | To dynamically monitor soil and water conservation in H ubei Province, the three factors of vegeta-tion, slope, and landuse are incorporated in the fast estimation of soil erosion using MODIS images and other investigated information. First, a vegetation coverage map is extracted from MODIS images. Second, a land-use distribution map is obtained from TM images. Third, a slope map is created from DEM. Finally, based on the standards of soil erosion grading, a soil erosion distribution map is obtained by overlaying the maps of landuse distribution, vegetation coverage, and slope. Based on geographic information system(GIS), the de-gree and distribution of soil erosion in Hubei Province are quantitatively analyzed using MODIS images in 2004 and 2005 and the change of soil erosion from 2004 to 2005 is analyzed. |
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| Keywords: | MODIS GIS |
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