Analysis of principal components of wastewater affecting soil water repellency
In order to identify the effect of irrigation wastewater quality on soil water repellency,the repellency of five oils samples,which belong to three types of water-repellent soils collected in Israel,was measured for the domestic sewage with 12 different degrees of water pollution.The measured water drop penetration time (WDPT) on the heterogeneity soils was normalized,and the principal components analysis (PCA) was conducted for the nine individual water quality indices in those sewages.Subsequently,the aggregative index (F) of sewage quality was calculated,and the relationship of WDPT to F and individual water quality indices was analyzed.The results showed that there was a positive correlation between WDPT and F for clay and loamy soils,i.e.WDPT rises with increasing F; for sandy soils,however,there was no significant correlation,i.e.WDPT is not affected by degree of water pollution.The results of multiple linear regression showed that there was a significant positive correlation between WDPT and two principal components for clay and loamy soils.Furthermore,the influence of the first principal component was more dominated than the second one.
wastewaterirrigat1onsoil water repellencyprincipal component analysismultiple regressionswater quality index
国家科技期刊平台
NSTL
万方数据
维普
