准噶尔盆地东部土壤风蚀危险度评价

发布时间：2018-09-03 15:33

【摘要】：以准噶尔盆地东部露天矿区为研究区,基于GIS技术和土壤风蚀理论,结合研究区自然环境现状,选取植被覆盖度、土地利用类型、土壤可蚀性指数(K值)、地形起伏度为土壤风蚀危险度评价因子,建立土壤风蚀危险度模型,对研究区土壤风蚀危险度进行评价分析。结果表明:研究区土壤风蚀无险型区域面积28.99km2(0.13%),轻险型区域面积为2 100.66km2(9.42%),危险型区域面积为5 066.56km2(22.72%),强险型区域面积为14 593.12km2(65.44%),极险型区域面积为646.7km2(2.29%)。在各个因子的影响下,研究区的风蚀危险度极高,强险型为研究区内最主要的等级程度。研究区土壤风蚀危险度从南向北危险度有增加的趋势,且成片状分布,与实际情况相吻合,说明基于GIS技术的土壤风蚀危险度评价可宏观地揭示新疆准东地区土壤风蚀危险度空间格局分异特征。
[Abstract]:Taking the open pit area of eastern Junggar Basin as the study area, based on GIS technology and soil wind erosion theory, the vegetation coverage and land use type are selected according to the natural environment of the study area. The soil erodibility index (K value) and topographic fluctuation are the evaluation factors of soil wind erosion risk. The model of soil wind erosion risk is established and the risk degree of soil wind erosion in the study area is evaluated and analyzed. The results showed that the area of the study area was 28.99km2 (0.13%), 2 100.66km2 (9.42%), 5 066.56km2 (22.72%), 14 593.12km2 (65.44%) and 646.7km2 (2.29%), respectively. The area of the study area was 0. 13% (0. 13%), 2 100.66km2 (9. 42%), 5 066.56km2 (22. 72%), 14 593.12km2 (65. 44%) and 2. 29% (2. 29%) respectively. Under the influence of various factors, the risk of wind erosion in the study area is very high, and the strong risk type is the most important grade in the study area. In the study area, the risk degree of wind erosion increases from south to north, and it distributes in sheets, which is consistent with the actual situation. It is concluded that the assessment of soil wind erosion risk based on GIS technology can reveal the spatial pattern differentiation characteristics of soil wind erosion risk degree in Jindong area of Xinjiang.
【作者单位】：新疆大学资源与环境科学学院/教育部绿洲生态重点实验室;
【基金】：新疆维吾尔自治区自然科学基金项目(2014211A018)
【分类号】：S157.1

【相似文献】