鲁西北平原区浅层地下水质量评价及指标优化OA北大核心CSTPCD

[Objective]In order to optimize the groundwater quality monitoring plan,identify the primary controlling factors of groundwater quality in the Northwest Shandong Plain,and rapidly assess variations in groundwater quality,[Methods]We based on the shallow groundwater quality data from the Northwest Shandong Plain in 2020,statistical software and G1S software were used to conduct descriptive statistics and spatial information differential analysis of the water quality in the study area.The Entro-py Weighted Quality Index(EWQI)was used,and a multiple linear regression model was employed to explore the hydrochemical indicators that represent groundwater quality in the study area.[Results]The result indicated that the groundwater quality in the Northwest Shandong Plain tends to be in a moderate state.The water quality in the alluvial and aeolian sediment plain hydrogeo-logical sub-areas and the alluvial plain brackish-freshwater hydrogeological sub-areas is relatively poor,while the water quality in the alluvial floodplain freshwater hydrogeological sub-area is relatively better.After optimizing the EWQI model indicators,the hydrochemical indicators that represent the groundwater quality in the entire study area are TDS,Mn2+,I-,F,and Al3+.The R2 and RMSE values of the optimized EWQImin model are 0.996 and 5.094,respectively,with a percentage error(PE)of 3.615％.[Conclusion]The result demonstrate that the selected indicators in the EWQImin model exhibit good representativeness and can be used as the primary monitoring targets for water quality assessment.This model provides valuable references for opti-mizing and adjusting the water quality monitoring network and implementing relevant management measures.