| 陕西省丹汉江流域典型县土壤侵蚀的地貌分布特征 |
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| 引用本文： | 王星,李占斌,李鹏,高海东.陕西省丹汉江流域典型县土壤侵蚀的地貌分布特征[J].北京林业大学学报,2013,35(1):23-29. |
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| 作者姓名： | 王星 李占斌 李鹏 高海东 |
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| 作者单位： | 1 西安理工大学水利水电学院2 陕西省水土保持局3 中国科学院水利部水土保持研究所 |
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| 基金项目： | “973”国家重点基础研究发展计划项目(2011CB411903);国家自然科学基金项目(40971161);陕西省教育厅重点实验室项目(09JS094) |
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| 摘 要： | 为揭示陕西省丹汉江流域典型县土壤侵蚀的空间分布特征，利用地理信息系统技术，通过对石泉县和商南县土壤侵蚀强度分布图和DEM图的叠加，得到土壤侵蚀强度在坡度、坡向、高程、起伏度等地貌因子的空间分布状况。结果表明:研究区水土流失程度较高，土壤侵蚀强度以轻度和中度为主。不同坡度、高程、起伏度下的水土流失面积比例、土壤侵蚀综合指数和土壤侵蚀强度均呈现单峰分布，平地的水土流失面积接近0，不同坡向的土壤侵蚀强度分布差异不显著。不同土壤侵蚀强度的最大值随着坡度升高而增大，但却随着高程的升高而减小。各土壤侵蚀强度的起伏度分布特征均很相似。此结论可为陕西省丹汉江流域中游地区水土保持规划和水土流失治理提供决策依据和理论支持。
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| 关 键 词： | 丹汉江流域 地理信息系统 土壤侵蚀 地貌特征 |
| 收稿时间： | 1900-01-01 |
Landform distribution features of soil erosion of typical counties in Dan-Han River Watershed of Shaanxi Province,northwestern China |
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| WANG Xing, LI Zhan-bin , LI Peng, GAO Hai-dong.Landform distribution features of soil erosion of typical counties in Dan-Han River Watershed of Shaanxi Province,northwestern China[J].Journal of Beijing Forestry University,2013,35(1):23-29. |
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| Authors: | WANG Xing LI Zhan-bin LI Peng GAO Hai-dong |
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| Institution: | 1 College of Water Resources and Hydraulic Power, Xi’an University of Technology, 710048, P. R. China; 2 Shaanxi Provincial Bureau of Soil and Water Conservation, Xian, 710004, P. R. China; 3 Institute of Soil and Water Conservation,Chinese Academy of Sciences ＆ Ministry of Water Resource, Yangling, Shaanxi,712100, P. R. China. |
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| Abstract: | In order to reveal the spatial distribution features of soil erosion of typical counties in Dan Han River Watershed of Shaanxi Province, northwestern China, GIS technology was used to obtain the landform features of soil erosion distribution in the case of slope degree, slope direction, elevation and rolling degree in Shiquan and Shangnan counties via overlap of the distribution maps of soil erosion intensity and landform element maps extracted from digital elevation model. The results showed that the degree of soil and water loss in study area was very serious. The soil erosion intensity was mainly light and moderate. The distribution of soil and water loss area percent, soil erosion comprehensive index and soil erosion intensity in the case of different slope degree, elevation and rolling degree was assumed as single peak. The soil and water loss area of flatland was proximal zero. The distribution of soil erosion intensity in the case of different slope directions was not different dramatically. The maximum of different soil erosion intensity increased with the rise of slope degree, but decreased with elevation rising. The distribution features of each soil erosion intensity type in the case of different rolling degrees were similar. These conclusions can provide policy evidence and theory support for making regional plan of soil and water conservation, and treatment of soil erosion and water loss in the middle stream of Dan Han River Watershed of Shaanxi Province, northwestern China. |
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| Keywords: | Dan-Han River Watershed geographic information system soil erosion landform feature |
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