基于主成分分析的水土保持生态效应评价指标敏感性分析
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摘要
为筛选出水土保持生态效应评价的影响因素中的高敏感性指标,以新疆建设兵团农一师垦区的生态效应评价指标敏感性分析为例,根据该地区的水土流失类型及水土保持措施特点,选取该地区包括林草覆盖率在内的7个代表性指标进行主成分分析,并按照敏感性大小对各指标排序。结果表明,指标敏感性由大到小排序为林草覆盖率、盐碱化百分比、土壤风蚀面积占区域总面积百分比、沙化土地百分比、耕地面积百分比、风蚀模数、沙尘暴日。研究成果可为水土保持决策制定提供依据。
In order to screen the high sensitivity indicators of influencing factors for ecological effect evaluation of soil and water conservation,taking the typical reclamation area in XinJiang as an example,based on the types of water and soil loss and the characteristics of soil and water conservation measures,the principal component analysis was use to select seven indexes,and the sensitivity of each index was sorted.The result show that the sort of the sensitivity index from strong to weak is as follows:vegetation coverage rate,salinization percentage,soil erosion area percentage,desertification percentage,farmland area percentage,wind erosion modulus,sandstorm days.The research can provide the basis for water and soil conservation decision-making.
In order to screen the high sensitivity indicators of influencing factors for ecological effect evaluation of soil and water conservation,taking the typical reclamation area in XinJiang as an example,based on the types of water and soil loss and the characteristics of soil and water conservation measures,the principal component analysis was use to select seven indexes,and the sensitivity of each index was sorted.The result show that the sort of the sensitivity index from strong to weak is as follows:vegetation coverage rate,salinization percentage,soil erosion area percentage,desertification percentage,farmland area percentage,wind erosion modulus,sandstorm days.The research can provide the basis for water and soil conservation decision-making.
引文
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[2]梁欢欢,安达,王月,等.基于OAT-GIS技术的地下水污染风险评估指标权重敏感性分析[J].环境工程技术学报,2016,6(2):139-146.
[3]蔡甲冰,刘钰,许迪,等.基于通径分析原理的冬小麦缺水诊断指标敏感性分析[J].水利学报,2008,39(1):83-90.
[4]刘永杰,李忠辉,苏飞,等.基于灰色关联分析的突出预测指标敏感性研究[J].中国矿业,2012,21(9):115-117,121.
[5]张鹏,杜泽生,李忠辉,等.基于主成分分析的突出危险性评价指标敏感性分析[J].煤矿安全,2012,43(4):1-4.
[6]迟国泰,陈洪海.基于信息敏感性的指标筛选与赋权方法研究[J].科研管理,2016,37(1):153-160.
[7]汪冬华.多元统计分析与SPSS应用[M].上海:华东理工大学出版社,2010:192-215.
[8]曹睿,岳德鹏,薛莎莎,等.新疆典型垦区水土保持生态效益评价——以阿克苏农一师垦区为例[J].中南林业科技大学学报,2013,33(4):76-81.
[9]姚文波,刘文兆,赵安成.水土保持效益评价指标研究[J].中国水土保持科学,2009,7(1):112-117.