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浙江省低丘红壤区土壤侵蚀评价研究
引用本文:丁晓东,许红卫,高玉蓉,祝锦霞,王珂.浙江省低丘红壤区土壤侵蚀评价研究[J].土壤通报,2008,39(5).
作者姓名:丁晓东  许红卫  高玉蓉  祝锦霞  王珂
基金项目:国家自然科学基金,浙江省发展和改革委员会项目,浙江省水利厅项目
摘    要:本文以浙江省低丘红壤区为研究对象,利用卫星遥感影像构造削弱阴影等干扰的FCD模型,和混合像元法计算植被覆盖度的方法,进行水土流失研究。根据水利部颁布的《土壤侵蚀分类分级标准》,结合植被覆盖度、坡度、利用现状等因子进行土壤侵蚀强度评价。研究结果表明目前红壤区内植被覆盖情况良好,覆盖度基本在30%以上;整体水土流失程度较轻,但是耕地等农用地的侵蚀情况较为严重,特别是红壤区内耕地的强度侵蚀的面积占其总面积的17.65%。另外,耕作侵蚀也是土壤侵蚀非常重要的因素,在估算土壤侵蚀强度的时候也应重视。目前浙江省需要补充大量耕地以满足社会发展的需要,鉴于红壤水土流失易发的特点,在低丘红壤开发时要重视水土流失的预防和控制。

关 键 词:遥感  土壤侵蚀  低丘红壤  评价  耕作侵蚀

Soil Erosion Evaluation of Lower Hilly Red Soil Regions in Zhejiang Province
DING Xiao-dong,XU Hong-wei,GAO Yu-rong,ZHU Jin-xia,WANG Ke.Soil Erosion Evaluation of Lower Hilly Red Soil Regions in Zhejiang Province[J].Chinese Journal of Soil Science,2008,39(5).
Authors:DING Xiao-dong  XU Hong-wei  GAO Yu-rong  ZHU Jin-xia  WANG Ke
Abstract:The soil erosion of lower hilly red soil regions in Zhejiang was studied in this paper. There are two main models, a FCD model which can decrease the interferences from shadows, and a mixed pixel model to estimate vegetation coverage. According to the Standards for classification and gradation of soil erosion, the intensity of soil erosion was obtained from vegetation coverage, slope, land-use and other factors. Results show that vegetation coverage is in a good status that the vegetation fraction is generally more than 30%, and the soil erosion in the study area is slight, but agricultural land such as plantation is rather serious, especially the area where intense erosion plantation has reached 17.65%. In addition, tillage is another very important factor in engendering soil erosion, which should be paid more attention in calculating soil erosion. However, soil erosion is likely to occur in such areas, so the preventing and controlling of soil erosion still needs more attention.
Keywords:RS  Soil erosion  Lower hilly red soil  Evaluation  Tillage erosion
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