| 兰敏.基于GIS的秦巴山区土壤侵蚀空间特征分析——以陕西省宁强县为例[J].干旱地区农业研究,2012,30(2):196~200 |
| 基于GIS的秦巴山区土壤侵蚀空间特征分析——以陕西省宁强县为例 |
| Analysis of spatial characteristics of soil erosion in Qinba mountainous area of Shaanxi based on GIS |
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| DOI：10.7606/j.issn.1000-7601.2012.02.33 |
| 中文关键词: GIS USLE 土壤侵蚀 秦巴山区 宁强县 |
| 英文关键词:GIS USLE soil erosion Qinba mountainous area Ningqiang County |
| 基金项目:陕西省典型县区土壤侵蚀调查研究(K332021006) |
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| 中文摘要: |
| 为了给秦巴山区宁强县的水土保持与土壤侵蚀防治提供科学依据，本研究利用遥感影像解译和GIS技术，得到研究区土地利用现状、植被覆盖和
数字高程模型（DEM）等数据，并利用USLE模型计算研究区的土壤侵蚀模数。结果表明，研究区的土壤侵蚀面积轻度占47.015%，中度占33.36%，强度占12.53%。土壤侵蚀严重的地区主要分布在研究区的东北部，并且也是灌溉水田、水浇地、旱地和菜地分布的区域；本研究还运用GIS和遥感技术，选用通用土壤流失方程(USLE)成功估算了宁强县的侵蚀模数及各种
侵蚀等级面积，研究结果与二调结果相符合。 |
| 英文摘要: |
| Characteristics of soil erosion of Ningqiang County in Qinba mountainous area were studied to provide scientific basis for soil and water conservation and soil erosion control in this area. Data about land use types and vegetation coverage were obtained by interpreting remote sensing image, and DEM was obtained by processing topographic map data with GIS technology, and then soil erosion modulus was calculated through plugging these data into USLE model. The domination soil erosion types in study area were mild (47.015%), moderate (33.36%) and strong (12.53%), and serious soil erosion area was mainly distributed in the northeast of the study area which mainly included irrigated paddy field, irrigated filed, dryland and vegetable field. Soil erosion modulus and all erosion area of each erosion grade in Ningqiang County were successively estimated through USLE model combined with GIS and remote sense. The results of this study corresponded to the past monitoring programs according to the comparison with second adjustment results. |
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