Shandong Science ›› 2022, Vol. 35 ›› Issue (1): 120-127.doi: 10.3976/j.issn.1002-4026.2022.01.016

• Environment and Ecology • Previous Articles     Next Articles

Hydrochemical characteristics and controlling factors of groundwater in Bailang River catchment

WU Zhen(),WANG Song-tao   

  1. Key Laboratory of Coastal Geological Environment Protection, Shandong Bureau of Geology and Mines, The Fourth Institute of Geology and Mineral Exploration, Weifang 261021, China
  • Received:2021-02-22 Online:2022-02-20 Published:2022-01-25

Abstract:

High-concentration brine exists in the northern part of the Bailang River catchment aquifer.In recent years,the brine has flowed southward and potentially impacts the water supply in the southern plain area.Correct understanding of its hydrochemical characteristics and the evolution of Bailang River catchment is important for the reasonable management of groundwater resources and safety of water supply.Based on the previous research results,through groundwater sampling and a variety of hydrochemical analysis,including Piper Diagram,Gibbs Diagram,and inorganic ion tracer,groundwater hydrochemistry characteristics and its controlling factors in both freshwater area and brine area were studied.The total dissolved solids of groundwater in freshwater area and brine area are 1 098.1 and 115 669.3 mg/L,respectively,which indicates that the formation of groundwater chemical composition in the two areas is controlled by different factors.The chemical composition of groundwater in freshwater area is mainly decided by the water-rock interaction.The salt in the brine area comes from three seawater intrudings,but the groundwater in brine area is no longer the original seawater; it has been replaced by new water from precipitation in the southern mountain area under the driving force of the natural hydraulic gradient.The distribution of hydrochemical field is the result of water-salt interaction during the groundwater recharge,runoff,and discharge processes.The main minerals dissolved in the water-salt interaction process are NaCl,MgCl2,Na2SO4,and MgSO4.

Key words: Bailang River, coastal zone, brine, hydrochemistry, evaporate

CLC Number: 

  • X143