基于PCA的岩溶地下河水质评价——以重庆青木关南段岩溶槽谷地下河为例  

A PCA-Based Evaluation of Water Quality of Underground Rivers in Karst Areas ——A Case Study on the South of Qingmuguan Subterranean Stream in Chongqing

作　　者：颜赫[1] 贾亚男[1,2] 王开然[3] 胡大超 苗海通 李静文[1] 薛倩倩[1] 彭玲莉[6] 

机构地区：[1]西南大学地理科学学院,重庆400715 [2]三峡库区生态环境与生物资源重点实验室,重庆400715 [3]吉林大学环境与资源学院,长春130021 [4]湖南有色地质勘探局,湖南郴州423400 [5]中铁十六局集团第一工程有限公司,北京101300 [6]江苏省有色金属华东地质勘查局,南京210007

出　　处：《西南大学学报（自然科学版）》2014年第4期133-138,共6页Journal of Southwest University(Natural Science Edition)

基　　金：国家自然科学基金青年基金资助项目(41101036)

摘　　要：为研究地下河水质状况,以重庆青木关南段岩溶槽谷的地下河为研究对象,采用以主成分分析方法为主的一系列数学方法对野外作业采集的数据进行科学分析,认为第一、二、三主成分的因子载荷量分别是48.721%,19.095%和13.112%,累积贡献率为80.929%.水质的综合得分为-0.83.结合水质评价标准,认为该区的水质虽然受到一定程度的污染,但是水质的整体质量居于中等偏上.建议暴雨期间进行加密监测,确定水质在雨水作用下的响应.Previous researches related to the water quality of underground rivers put more emphasis on qualitative evaluation than on quantitative analysis.In a study reported in this paper,water samples were collected from the southern section of a Qingmuguan subterranean stream in Chongqing.Experiments were conducted in the laboratory to analyze the water samples collected outdoors,and Principal Component Analysis（PCA）was utilized to analyze the resulting data.The factor load capacity of the first,second and third principal components were 48.721%,19.095% and 13.112%,respectively,and their cumulative contribution rate was 80.929%.The water quality composite score was-0.83.It is concluded based on the water quality evaluation criteria that the quality of the underground water in this region is,as a whole, a little above the medium despite a slight pollution.It is recommended that high frequent monitoring be made during rainstorms to make clear the response of underground water quality to rainfall.

关 键 词：岩溶水 地下河 主成分分析 

分 类 号：P964[天文地球—自然地理学]