期刊论文

Liu, J.(liyunliuji@163.com)

中文

中南大学学报(自然科学版)

1672-7207

2012

43

12

4895-4901

湖南省科技计划项目（2011SK3128）；

本校为第一且通讯机构

基于湘西自治州是典型的喀斯特石漠化区域,工程建设对区域的植被破坏,水土流失起到促进、加速、叠加的负作用,从动力学的观点其实质是加大了石漠化形成的动力强度,在大量缺失信息条件下,采用PCA主成分多元分析的方法对湘西喀斯特石漠化地区生态安全影响评价。根据石漠化形成的动力学过程分析和工程建设对环境影响的动力学结果,将工程建设对石漠化有较大影响的14个因子作为石漠化研究的基本指标。通过主分量分析确定P_1P_2主成分因子,再对P_1P_2主成分因子进行梯度分析。研究结果表明:P_1P_2平面上植被子系统各属性因子的分布有明显的规律性,当复相关系数R=0.924 6时,P_1(x7~x11)轴表征石漠化的形...

Based on the fact that Xiangxi is a typical karst rocky desertification area, and that engineering construction in the regional vegetation is destroyed, soil and water loss has a negative impact on promotion, acceleration and superposition, and from the viewpoint of kinetics, its essence is to increase the dynamic strength of the rocky desertification formation, and in the large lost information, PCA (principal component analysis) was used to evaluate the ecological security assessment of karst rocky desertification area. According to the dynamic process of the formation of the rocky desertifi...