Groundwater hydrogeochemical characteristics and quality suitability assessment for irrigation and drinking purposes in an agricultural region of the North China plain

摘要: Eighty-one samples from both shallow and deep aquifers were collected analyzed to reveal groundwater hydrogeochemical characteristics estimate quality suitability for irrigation drinking purposes based on indexes models including the sodium adsorption ratio (SAR), residual carbonate (RSC), solute percentage (%Na), magnesium hazard (MH), permeability index (PI) health risk model. The results assessment indicated that in most part of study region was suitable regardless EC, RSC MH, while aquifer purpose nearly all parts region. 24.49% 14.29% sampling locations presented high fluoride (F−) concentrations exceeded Grade III value (1 mg/L) Quality Standard Groundwater China maximum permissible 1.5 mg/L recommended by WHO use, respectively. Non-carcinogens quotient (HQ) values NO3−–N, NH4+–N, NO2−–N, Fe, Mn with exception F− within acceptable safety limit (HQ < 1). Efficient strategies scientific decisions suggested resource protection water improvements should be adopted sustainable exploitation.