| 基于RS和GIS的喀斯特区域水土流失动态监测与分析——以广西环江县为例 |
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| 引用本文： | 张明阳,王克林,陈洪松.基于RS和GIS的喀斯特区域水土流失动态监测与分析——以广西环江县为例[J].资源科学,2007,29(3):124-131. |
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| 作者姓名： | 张明阳 王克林 陈洪松 |
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| 作者单位： | 1. 中国科学院亚热带农业生态所,长沙,410125;中国科学院环江喀斯特农业生态试验站,环江,547100;中国科学院研究生院,北京,100049
2. 中国科学院亚热带农业生态所,长沙,410125;中国科学院环江喀斯特农业生态试验站,环江,547100 |
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| 基金项目： | 中国科学院"西部之光"人才培养计划;国家自然科学基金 |
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| 摘 要： | 以TM影像为主要信息源，结合土地利用数据和DEM高程，通过RS软件ERDAS IMAGINE和GIS软件ARCGIS，对喀斯特区域广西环江县1986年、1995年和2000年的水土流失状况进行了空间分布和随高程分异两个方面的动态监测和分析。结果表明喀斯特区域广西环江县由于生态环境移民和水土保持工作的影响，在1986年～1995年～2000年间水土流失总体趋势是有先好转后加剧，水土流失形势严峻，中度、强度、极强和剧烈水土流失面积在1986年～1995年间分别减少了116.59km2、92.06km2、11.91km2和0.74km2，而在1995年～2000年间分别增加了119.53km2、92.75km2、12.12km2和0.74km2。3个年份水土流失在高程分带上分异格局基本相似, 微度流失主要分布在丘陵，轻度、中度、强度和极强度流失都是主要分布在低山，其次才是丘陵，剧烈水土流失主要分布在丘陵，其次是低山和中山。另外，水土流失强度发生明显变化的地区是在东部、东北部生态移民集中安置区和北部农业交错带山地丘陵区。
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| 关 键 词： | 喀斯特 遥感 地理信息系统 广西环江县 水土流失 动态监测 |
| 文章编号： | 1007-7588(2007)03-0124-08 |
| 修稿时间： | 2006-05-25 |
Dynamic Monitoring and Analysis of Water and Soil Erosion in the Karst Region based on RS and GIS: A Cases Study in Huanjiang County, Guangxi Province |
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| ZHANG Ming-yang,WANG Ke-lin and CHEN Hong-song.Dynamic Monitoring and Analysis of Water and Soil Erosion in the Karst Region based on RS and GIS: A Cases Study in Huanjiang County, Guangxi Province[J].Resources Science,2007,29(3):124-131. |
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| Authors: | ZHANG Ming-yang WANG Ke-lin and CHEN Hong-song |
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| Institution: | 1. Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China ; 2. Huanjiang Experimental Station of Karst Ecosystem, Chinese Academy of Sciences, Huanfiang 547100, China 3. Graduate School of Chinese Academy of Sciences, Beifing 100049, China |
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| Abstract: | Water and soil erosion in Karst region is one of the most serious global environment problems. The environment of Huanjiang County, Guangxi Province, the largest immigration county of Karst regions in Southwest China, becomes worse more and more. Therefore, we studied spatial patterns and elevation variation of the erosion based on the data of land use, DEM data and other relative assistant data. Firstly, the erosion was classified into six grades: slight, low, moderate, intense, severe and acute, and dynamically monitored from 1986 to 2000 with the remote sensing software ERDAS IMAGE 8.7 and geographic information system software ARCGIS 9.0. Then, the elevation was classified into five zones and the changes of water and soil erosion with elevation zone was analyzed by combining DEM data. The results showed that:Because of the eco-environment emigration and the protection of water and soil, the erosion decreased from 1986 to 1995: the areas with low, moderate, intense, severe and acute soil erosion decreased 116.59km2, 92.06km2, 11.91km2 and 0.74km2 respectively between 1986 and 1995. However, the erosion increased from 1995 to 2000, and the areas with light, low, moderate, intense, severe and acute soil erosion increased 119.53km2, 92.75km2, 12.12km2 and 0.74km2 respectively between 1995 and 2000. The distribution pattern of the water and soil erosion in different elevation zone is similar to some extent during the two periods. Slight erosion is distributed in Low Mountain. Low, moderate, intense and severe erosions are mainly distributed in Low Mountain and highland partially. Acute erosion is mainly in hill, and Low Mountain and Middle Mountain partially. Moreover, the changes of water and soil erosion mainly happened in the east and northeast where the emigration settle down, and the middle mountain in the north, where is the ecotone between agriculture and animal husbandry or between forest and animal husbandry. |
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| Keywords: | Karst RS GIS Huanjiang Guangxi Province Water and soil erosion Dynamical monitoring |
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