榆林地区水土流失敏感性时空特征

发布时间：2019-01-09 11:02

【摘要】：用10km×10km的网格,把榆林地区划分为527个单元样地,采用加权和法,计算每个单元的水土流失敏感性指数,并在Arcgis中进行Kriging空间插值,分析水土流失敏感性时空特征。结果表明:全区无不敏感级别。2000年中度敏感区面积占全榆林面积的31.33%。高度敏感区面积占51.808%。极度敏感区占16.862%。2005年中度敏感区面积占35.876%。高度敏感区面积占48.153%。极度敏感区占15.971%。2010年轻度敏感区占0.229%。中度敏感区面积占28.047%。高度敏感区面积占44.176%。极度敏感区面积占27.548%。总体来说,东部水土流失敏感性较高,西部敏感性较低。从2000年到2010年,中度敏感性和高度敏感性面积减少了,而极度敏感性面积增加了。
[Abstract]:The Yulin area was divided into 527 unit plots by 10km 脳 10km grid. The sensitivity index of soil erosion was calculated by weighted sum method, and the spatial and temporal characteristics of soil erosion sensitivity were analyzed by Kriging interpolation in Arcgis. The results showed that the area of the whole area was 31.33% of the total area of Yulin in 2000. The area of highly sensitive area is 51.808. Extremely sensitive areas accounted for 16.862.The area of moderately sensitive areas accounted for 35.876 in 2005. The area of highly sensitive area was 48.153. Extremely sensitive area accounted for 15.971.The mildly sensitive area accounted for 0.229 in 2010. The area of moderate sensitive area was 28.047. The area of highly sensitive area was 44.176. The area of extremely sensitive area was 27.548%. Generally speaking, the sensitivity of soil erosion in the east is higher than that in the west. From 2000 to 2010, moderate and highly sensitive areas decreased, while extremely sensitive areas increased.
【作者单位】：长安大学地球科学与资源学院;山西农业大学林学院;
【基金】：国家自然科学基金资助项目(31140042) 陕西省自然科学基础研究计划基金资助项目(2009JM5004) 陕西省软科学计划基金资助项目(2007RK21) 长安大学中央高校基金资助项目(2013G1271102)
【分类号】：S157.1

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