| 鄱阳湖流域土地利用变化的土壤侵蚀效应 |
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| 引用本文： | 樊哲文,黄灵光,钱海燕,方 豫.鄱阳湖流域土地利用变化的土壤侵蚀效应[J].资源科学,2009,31(10):1787-1792. |
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| 作者姓名： | 樊哲文 黄灵光 钱海燕 方 豫 |
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| 作者单位： | 1. 中国科学院地理科学与资源研究所,北京,100101;江西省遥感信息系统中心,南昌,330046
2. 江西省遥感信息系统中心,南昌,330046 |
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| 摘 要： | 随着鄱阳湖流域开发进程加快,土地利用类型势必发生转移,从而对鄱阳湖流域的生态环境产生影响.为了能反映鄱阳湖流域由于土地利用变化对土壤侵蚀的影响效应,本文通过采用3S技术手段,获取鄱阳湖流域土地利用空间数据与土壤侵蚀数据,引入土地利用变化转移矩阵指数和土壤侵蚀强度指教,对鄱阳湖流域土地利用变化和土壤侵蚀效应空间关系进行定量分析.结果表明:①1985年～2000年间,影响鄱阳湖流域土壤侵蚀强度变化的土地类型主要集中在农田、林地和草地,而水域、工矿居民用地与未利用地三种土地类型对土壤侵蚀强度变化总体变化不大;②加重土壤侵蚀强度的主要是林地转化为农田、林地转化为草地、草地转化为农田;而土地利用类型农田转化为林地、林地内部之间的转化减轻了侵蚀强度.土地利用类型和土壤侵蚀强度之间的定量研究结果反映了土壤侵蚀效应的变化,与鄱阳湖流域的水土流失现实情况一致.
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| 关 键 词： | 鄱阳湖流域 土地利用 土壤侵蚀效应 3S技术 |
Soil Erosion Effects driven by Land Use Changes over the Poyang Lake Basin |
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| FAN Zhewen,HUANG Lingguang,QIAN Haiyan and FANG Yu.Soil Erosion Effects driven by Land Use Changes over the Poyang Lake Basin[J].Resources Science,2009,31(10):1787-1792. |
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| Authors: | FAN Zhewen HUANG Lingguang QIAN Haiyan and FANG Yu |
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| Abstract: | Due to accelerating exploitation and development over the Poyang Lake basin, the land use patterns over the area have been inevitably changed, which, in turn, has been exerting significant influences on the eco-environment over the basin. In order to investigate the influence of land use change on soil erosion over the basin, 3S (geographic information system, remote sensing and global positioning system) techniques were utilized to acquire the spatial information on land use and soil erosion of the Poyang Lake Bain. A transitional matrix of land use change and a soil erosion intensity index were introduced to quantify the spatial relationship between land use change and soil erosion. Results indicated that the transition in cover areas between forest land, cropland and grassland significantly impact soil erosion while water bodies, urban built-up land and unused land did not show similar trends in period 1985-2000. The transition of forestland to cropland and grassland, and the transition of grassland to cropland were the primary causes for aggravating soil erosion. On the contrary, an adverse trend in transition between forest land and other land use types has, to some degree, alleviated the soil erosion effect. For instance, because of cropland converting into cropland, forestland, water bodies, unused land as well as build-up land, estimated erosion intensity index reduced from 172.73, 172.73, 146.52, 139.26 and 116.59 in 1985 to 151.35, 153.13, 115.41.128.11 and 112.06 in 2000, respectively. Particularly, the transition of cropland to grassland resulted in an increase in erosion intensity index from 154.24 to 188.14 and the transition of forestland to grassland leaded to an apparent increase in erosion intensity index from 122.52 to 267.33. These results suggested that the detected changes in soil erosion situation were generally coincident with actual situation of water and soil loss in the Poyang Lake Basin. |
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