Study on the temporal and spatial variation of the conversion relationship between surface water and groundwater in the basin
The temporal and spatial variation of the conversion relationship between surface water and groundwater is one of the key issues in water resources management and protection.The purpose of this study is to reveal the transformation process and its spatial and temporal variation between surface water and groundwater in the basin by sampling and investigating the influence of TDS content and isotope changes in surface water and groundwater in the upper,middle and lower reaches.The results show that in the dry season,the TDS of surface water in the mainstream is greater than that of groundwater in the mainstream,whether in the upper,middle and lower reaches.In the upstream,the TDS of groundwater in the Tianshui River increases along the flow path,while the TDS of groundwater in the Tianshui River is basically unchanged.The δD and δ18 O values were depleted during the dry season.The dry season is usually accompanied by dry climate and high temperature condi-tions,which promote the evaporation of water.
surface watergroundwatertransforming relationshiptemporal and spatial changes
NETL
NSTL
万方数据
