主成分分析法在地下水质量评价中的应用

摘要

在水质评价应用中,采用主成分分析法( PCA) ,将多因子纳入同一系统进行定量化研究,基于 MAT-LAB软件编程[1] ,对德阳市平原区地下水进行综合质量评价,并与模糊数学评价结果对比分析,结果表明,前6 个主成分携带的信息达到 85. 73%,再分析这 6 个新的综合指标,确定研究区水质问题主要为总硬度及总溶解固体(TDS)超标,地下水质量最好为绵竹市水样点SY14,水质最差为旌阳区水样点 SY58,该结果符合实际监测情况;选用主成分分析方法,结合模糊数学的计算而划分的地下水分级标准,能较好的体现区内地下水质量.%The paper takes the principal component analysis ( PCA) method, will be through the quantitative research on the many factors included in the same system based on MATLAB software programming[1] , comprehensive quality evaluation of Deyang city groundwater, and compared with fuzzy mathematical evaluation results analysis, the results show that the best for SY14 Deyang city groundwater quality, water quality is the worst for SY58, the results accord with the actual monitoring; Se-lects the principal component analysis method, combining the fuzzy mathematics of groundwater classification standard, divid-ed by the calculation of can better reflect the groundwater quality in the area.