Using hydrogeochemical data to trace groundwater flow paths in a cold alpine catchment
Using hydrogeochemical data to trace groundwater flow paths in a cold alpine catchment
复制标题
利用水文地球化学数据追踪寒冷高山流域的地下水流动路径
DOI：
10.1002/hyp.13440
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发表时间：
2019-07-01
影响因子：
3.2
通讯作者：
Sun, Ziyong
中科院分区：
文献类型：
--
作者：
Hu, Yalu;Ma, Rui;Sun, Ziyong
对青藏高原东北部地下水流动路径的认识仍存在很大的不确定性。结合水文地球化学和同位素数据以及水文地质数据，探索了黑河源区代表性冷高山流域的地下水流动路径。结果表明，表层冻土地下水化学成分主要受方解石溶解和蒸发的影响，而地下多年冻土地下水地球化学则受白云石和石膏溶解、方解石沉淀、钠长石和石盐溶解的控制。独特的水文地球化学特征和控制过程表明，上永久冻土和次永久冻土地下水之间的水力连通性较差。多年冻土地下水与季节性冻结区地下水之间的水力连通性通过其相似的水文地球化学特征得到证实。在季冻区，低渗透性的粉质粘土层将含水层分为深层（深度>20 m）和浅层（深度
Significant uncertainty remains in understanding the groundwater flow pathways in the northeastern Qinghai-Tibet Plateau. Hydrogeochemical and isotopic data as well as hydrogeological data were combined to explore the groundwater flow path in a representative cold alpine catchment in the headwater region of the Heihe River. The results indicate that the suprapermafrost groundwater chemical components were mainly affected by calcite dissolution and evaporation, whereas the geochemistry of subpermafrost groundwater was controlled by dolomite and gypsum dissolution, calcite precipitation, and albite and halite dissolution. Distinct hydrogeochemical characteristics and controlling processes suggest a poor hydraulic connectivity between the suprapermafrost and subpermafrost groundwater. The hydraulic connectivity between permafrost groundwater and groundwater in the seasonally frozen area was confirmed by their similar hydrogeochemical features. In the seasonally frozen area, a silty clay layer with low permeability separates the aquifer into the deep (depth >20 m) and shallow (depth