基于3S技术的地形起伏度与区域土壤侵蚀的相关性研究

发布时间：2018-09-01 07:57

【摘要】：地形起伏度直接影响着地面的径流变化,是导致土壤侵蚀的主要根源之一。分析两者相关性的前提是准确提取地形起伏度,而确定研究数据尺度下地形起伏度的最佳分析窗口是得出可靠结果的保障。在3S技术的支持下,运用均值变点法分析罗甸县基于DEM(空间分辨率为30m×30m)的最佳分析窗口,并依据2007年修正的土壤侵蚀分类分级标准估算研究区各样本单元的土壤侵蚀量,对两者进行相关性分析。结果表明:罗甸县在该尺度数据源下的最佳分析窗口为32×32,最佳统计面积为0.921 6km~2,实证了均值变点分析方法提取地形最佳分析窗口的可行性;地形起伏度与区域土壤侵蚀模数的相关系数为0.519 1,充分说明了作为宏观地形因子之一的地形起伏度是区域土壤侵蚀的主导因素之一。
[Abstract]:Topographic fluctuation directly affects the surface runoff and is one of the main causes of soil erosion. The premise of analyzing the correlation between them is to extract the topographic fluctuation accurately, and the best analysis window to determine the topographic fluctuation on the scale of the data is the guarantee to get the reliable results. With the support of 3s technology, the mean value variation point method is used to analyze the optimal analysis window based on DEM (spatial resolution is 30m 脳 30m) in Luodian County, and the soil erosion amount of each sample unit in the study area is estimated according to the revised classification and classification standard of soil erosion in 2007. The correlation between them was analyzed. The results show that the optimal analysis window is 32 脳 32 and the optimal statistical area is 0.921 6kmm2 in Luodian County. The feasibility of extracting the best terrain analysis window by means of mean change point analysis is demonstrated. The correlation coefficient between topographic fluctuation and regional soil erosion modulus is 0.519, which fully shows that topographic fluctuation is one of the leading factors of regional soil erosion as one of the macro topographic factors.
【作者单位】：贵州大学林学院;
【基金】：贵州省科学技术资助项目(黔科合J字[2014]2070号) 贵州大学引进人才科研资助项目(贵大人基合字([2013]31号) 贵州省科技计划课题资助(黔科合LH字[2014]7649号)
【分类号】：S127;S157.1

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