宁强县土壤侵蚀的地貌分布特征

为了揭示宁强县土壤侵蚀的空间分布特征,利用GIS技术,通过对宁强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分布特征。结果显示,宁强县水土流失程度为63.79%,土壤侵蚀强度以中度为主。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分别随着坡度增加、高程升高、起伏度上升呈先增大后减小的单峰分布趋势。平地的水土流失面积比例接近0,不同坡向的水土流失面积比例、土壤侵蚀综合指数和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和分布范围均随着坡度的增加而增大,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均很相似。...

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Bibliographic Details
Published in农业工程学报 Vol. 28; no. 11; pp. 132 - 137
Main Author 王星 李占斌 李鹏 高海东
Format Journal Article
LanguageChinese
Published 西安理工大学水利水电学院,西安710048 2012
陕西省水土保持局,西安710004%西安理工大学水利水电学院,西安,710048
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ISSN1002-6819
DOI10.3969/j.issn.1002-6819.2012.11.022

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Summary:为了揭示宁强县土壤侵蚀的空间分布特征,利用GIS技术,通过对宁强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分布特征。结果显示,宁强县水土流失程度为63.79%,土壤侵蚀强度以中度为主。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分别随着坡度增加、高程升高、起伏度上升呈先增大后减小的单峰分布趋势。平地的水土流失面积比例接近0,不同坡向的水土流失面积比例、土壤侵蚀综合指数和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和分布范围均随着坡度的增加而增大,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均很相似。此结论可为区域水土保持规划和水土流失治理提供决策依据和理论支持。
Bibliography:geographic information system, soils, erosion, landform, distribution feature
11-2047/S
Wang Xing, Li Zhanbin, Li Peng, Gao Haidong (1. College of Water Resources and Hydraulic Power, Xi 'an University of Technology, Xi 'an 710048, China; 2. Shaanxi Provincial Bureau of Soil and Water Conservation, Xi 'an 710004, China)
In order to reveal the spatial distribution features of soil erosion in Ningqiang county, the GIS technology was used to obtain the landform features in the respects of slope degree, slope direction, elevation and rolling degree of soil erosion distribution via overlap of the distribution map of soil erosion intensity in Ningqiang county and the landform element maps extracted from the digital elevation model. The results showed that the degree of soil erosion and water loss in Ningqiang county was 63.79%. The soil erosion intensity was mainly moderate. The distributions of soil erosion area percentage, soil erosion comprehensive index and soil erosion intensity at different slope degree, elevati
ISSN:1002-6819
DOI:10.3969/j.issn.1002-6819.2012.11.022