甘肃梨园河流域地下水水化学演化规律  

Evolution of the groundwater hydro-geochemistry of Liyuan River Basin in Gansu Province

作　　者：党慧慧[1] 董军[1] 董阳[1] 郭映[1] 岳宁[1] 徐翔[2] 魏国孝[1] 

机构地区：[1]兰州大学资源环境学院,兰州730000 [2]弗林德斯大学环境学院

出　　处：《兰州大学学报（自然科学版）》2015年第4期454-461,共8页Journal of Lanzhou University(Natural Sciences)

基　　金：国家自然科学基金创新群体项目(41471023)

摘　　要：通过研究自梨园河流域采集的7个地表水样和39个地下水样,分析梨园河流域地下水水化学组分的空间分布规律.梨园河流域地下水各离子质量浓度及总溶解固体值都具有由西到东、由高到低不断增高的趋势.研究表明该区地下水组分受岩石风化及蒸发/结晶作用影响都比较明显.根据张掖站每月降雨量同位素加权平均及年平均计算得到当地大气降水线.该区内地表水、浅层地下水、深层地下水的相互转化非常频繁,浅层地下水既受到蒸发作用影响也受到地表水补给和混合作用等多方面的影响,深层地下水的补给有一部分来源于古地下水.7 surface water samples and 39 groundwater samples were collected from Liyuan River Basin, and the chemical composition spatial distribution patterns of groundwater in the basin were analyzed. The results showed that from west to east, or from high to low altitude, ion concentrations and total dissolved solids along the path gradually increased. The research also illustratred that groundwater ions mainly came from rock weathering as well as evaporation. The local meteoric water line was calculated based on monthly precipitation data of Zhangye station by weighted average method. The study showed that the transformation between surface water and shallow groundwater and deep groundwater has been frequent. Shallow groundwater was affected by both evaporation and surface water recharge and its mixing action, while part of deep groundwater was recharged from ancient groundwater.

关 键 词：水化学特征 Gibbs图 环境同位素 梨园河流域 

分 类 号：P641.3[天文地球—地质矿产勘探]