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| 基于地形坡度的大别山区商城县土壤侵蚀研究 |
| Study on Soil Erosion in Shangcheng County Dabie Mountain Region Based on Terrain Slope |
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| DOI： |
| 中文关键词: 土壤侵蚀 地形坡度 遥感 地理信息系统 大别山区 |
| 英文关键词: Soil erosion Topographic gradient Remote sensing（RS） Geographical information system（GIS） Dabie mountains region |
| 基金项目:2016年国家重点研发计划基金资助项目（2016YFC0803103）；2017年河南省地矿局地质科研类基金资助项目（豫地矿科研〔2017〕14号） |
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| 中文摘要: |
| 使用基于地形坡度的土壤侵蚀要素提取方法，选择大别山区商城县为研究区，利用TM/OLI和SPOT 5/GF-1数据得到植被覆盖度和土地利用类型图，并结合DEM数据生成的地形坡度因子，基于GIS/RS提取土壤侵蚀信息及其时空变化量。结果显示，研究区2011年和2016年的土壤侵蚀主要分布在南部中低山地区，以轻度侵蚀为主，分别占总侵蚀面积的8113%和8397%；土壤侵蚀主要发生在坡度为5°～25°的区域，且随着坡度增大土壤侵蚀越严重；耕地的土壤侵蚀最严重；2011—2016年间虽然大部分区域土壤侵蚀状况不变，但整体有所加重。 |
| 英文摘要: |
| This paper used a method for studying soil erosion in Shangcheng county Dabie mountains region， based on topographic gradient factors obtained from DEM data， vegetation coverage and land use type maps from TM/OLI and SPOT 5/GF 1 data， and the soil erosion information and its spatial temporal variation from GIS/RS. The results showed that the soil erosion was mainly slight and distributed in the southern middle and low mountain area in 2011 and 2016， accounting for 81.13% and 83.97% of the total eroded area， respectively. The soil erosion mainly occurred on a gradient of 5°～25°， and was serious with the increase of gradient. The erosion of farmland was most serious. From 2011 to 2016， the situation of soil erosion remained unchanged in most regions， but became worse overall. |
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