灵江流域椒江段地表水和地下水化学特征及成因分析

Chemical characteristics and causes of surface water and groundwater in the Jiaojiang section of the Lingjiang river basin

本研究选择了8个地下水点和13个地表水点进行取样分析,综合利用数理统计、Piper三线图、Gibbs图和离子比值等分析方法,研究了椒江段的地表水和地下水化学组成特征和主要控制因素。结果显示,研究区地下水中优势阳离子和阴离子分别为Na^(+)、HCO_(3)^(-)和Cl^(-),水化学类型为HCO_(3)-Ca·Na型、HCO_(3)·Cl-Na型、HCO_(3)·Cl-Ca·Na型和Cl-Na型,主要受硅酸盐溶解作用、碳酸盐矿物溶解作用以及逆向阳离子交换作用影响。临海样品存在潮汐作用影响。地表水中优势阳离子为Ca^(2+),优势阴离子为HCO_(3)-,水化学类型为HCO_(3)-Ca·Na型、HCO_(3)·Cl-Ca·Na型、HCO_(3)-Ca型、HCO_(3)·SO_(4)^(-)Ca型和Cl_(-)Na型水,受硅酸盐和碳酸盐矿物溶解作用影响。研究区水体主要受工矿活动的影响,其次是农业活动和生活污水排放的影响。工业园区的生产活动对水体已经产生了一定的负面影响。

This study selected 8 groundwater points and 13 surface water points for sampling and analysis.Using methods such as mathematical statistics,Piper diagram,Gibbs diagram,and ion ratio analysis,the chemical composition and main controlling factors of surface water and groundwater in the Jiaojiang section were studied.The results showed that the dominant cations and anions in the groundwater of the study area were Na^(+),HCO_(3)^(-),and Cl^(-),respectively,and the hydro-chemical types were HCO_(3)-Ca·Na type,HCO_(3)·Cl-Na type,HCO_(3)·Cl-Ca·Na type,and Cl-Na type.The groundwater was mainly affected by the dissolution of silicates,dissolution of carbonate minerals,and cation exchange.The coastal samples were influenced by seawater mixing.The dominant cation in surface water was Ca~(2+),the dominant anion was HCO_(3)^(-),and the hydrochemical types were HCO_(3)-Ca·Na type,HCO_(3)·Cl-Ca·Na type,HCO_(3)-Ca type,HCO_(3)·SO_(4)-Ca type,and Cl-Na type.The water bodies in the study area were mainly affected by industrial and mining activities,followed by agricultural activities and discharge of domestic sewage.The production activities in the industrial park have already had a negative impact on the water bodies.