径流与地下水水化学特征时空变化及控制因素  

Time-space variability and controlling factors of runoff and groundwater hydro-chemical characteristics

作　　者：杨春[1] YANG Chun(Jiangsu Hydrological Water Resources Survey Bureau,Xuzhou Branch,Xuzhou 221000,Jiangsu,China)

机构地区：[1]江苏省水文水资源勘测局徐州分局,江苏徐州221000

出　　处：《地下水》2023年第5期82-84,共3页Ground water

摘　　要：分析干旱区河流和地下水的水化学特征变化及其控制因素对干旱区水安全具有重要意义。本文收集了河流和地下水样本,分析了其水化学特征变化,并用离子浓度确定了其主要的溶质来源。研究结果表明:下游主要离子含量均大于上游,且雨季径流中离子含量远高于枯水期;由于硝酸盐超标和碳酸盐风化,约三分之一的水样被列为最差水质,因此在雨季的水质并不理想;岩石风化作用对河流和地下水溶质的贡献最大;湿季溶质以蒸发岩溶解为主,干季溶质以碳酸盐风化为主;人类活动在某些领域不容忽视;化肥施用量占人为溶质投入总量的43%,以上研究结果表明农业对水质的影响越来越大。Analyzing changes in the hydro-chemical characteristics of rivers and groundwater in arid zones and the factors controlling them is important for water security in arid zones.In this paper,river and groundwater samples were collected,analyzed for variations in their hydro-chemical characteristics and their major solute sources were identified using ion concentrations,和.The results of the study show that:All major ions were greater in the downstream than in the upstream and were much higher in the runoff during the wet season than during the dry season;about one third of the water samples were classified as worst water quality due to nitrate exceedance and carbonate weathering,so the water quality during the rainy season was not ideal;rock weathering makes the greatest contribution to river and groundwater solutes;wet season solutes are dominated by evaporite dissolution and dry season solutes are dominated by carbonate weathering;human activities cannot be ignored in certain areas;fertiliser application accounts for 43%of total anthropogenic solute inputs,and the above findings suggest that:Agriculture is having an increasing impact on water quality.

关 键 词：水质 控制因素 质量平衡法 正演模型 稳定同位素 

分 类 号：P641.12[天文地球—地质矿产勘探] P641.74[天文地球—地质学]