| The Muwen River groundwater system is a five-level groundwater system in the Dawen River Basin,which has a large population and developed industry and agriculture.With the development of social economy,people have higher and higher requirements for drinking water,and more and more attention is paid to the content of minerals in the water.Strontium and metasilicic acid in the water are all needed by the human body and have a health impact Important components.In this paper,after conducting field investigations and sample collection in the study area,the data obtained were processed and analyzed,using mathematical statistics,isotope analysis,correlation analysis of water chemical components,ion ratio relationship,and reverse hydrogeochemistry Methods such as simulation were used to study the composition and distribution characteristics,ion sources and enrichment rules of strontium-rich and metasilicate-rich groundwater in the study area.At the same time,the water quality of the strontium-rich and metasilicate-rich groundwater in the study area was evaluated.The utilization of the strontium-rich and metasilicate-rich groundwater in the study area was summarized.Provide a scientific basis for further development and utilization.The results show that the cations are mainly Ca2+and Mg2+,while the anions are mainly HCO3-and SO42-.Generally,groundwater belongs to neutral weak alkaline low salinity water,in which the average pH value of karst water is higher than that of pore water and fissure water,the average TDS value of fissure water is the lowest,followed by karst water,and the average TDS value of pore water is the highest.HCO3·SO4-Ca and HCO3-Ca are the main hydrochemical types in the study area.The average concentration of strontium ion in groundwater is the highest in karst water,followed by pore water,and the lowest in fissure water;the content of metasilicic acid is the highest in fissure water,and lower in karst water and pore water.The enrichment of strontium ion in pore water and karst water is obvious,and metasilicic acid in fissure water is obvious.Generally speaking,the correlation between strontium ion and calcium,magnesium and sulfate ion in groundwater is high,while metasilicic acid only has a low correlation with pH value in fissure water and karst water.The main source of groundwater recharge in the study area is atmospheric precipitation.The evaporation of atmospheric precipitation after recharge of strontium rich groundwater and metasilicic acid rich groundwater is smaller than that after recharge of non strontium rich groundwater and non metasilicic acid rich groundwater.The recharge elevation of strontium rich groundwater and metasilicic acid rich groundwater is higher than that of other groundwater in the study area.The main water bearing rock layers of the strontium rich groundwater in the study area are dolomite and gravelly limestone of the Chaomidian formation,fine-grained dolomite of the Sanshanzi formation,gray thick middle limestone,gravelly bioclastic limestone,chert nodule limestone of the Majiagou group of the Ordovician system,and quaternary sandy clay,silty sand,and metasilicic acid rich groundwater,The water bearing rock layers are Neoproterozoic adamellite.The Hydrochemical Composition of groundwater in the study area mainly comes from the interaction of water and rock,among which the weathering of carbonate rock contributes the most to the chemical composition of groundwater,and the cation exchange occurs in various types of groundwater.The strontium ion in groundwater mainly comes from the dissolution and cation exchange of strontium bearing carbonate minerals,and the metasilicic acid mainly comes from the dissolution of plagioclase Solution:evaporation concentration has a key effect on the enrichment of Strontium in groundwater.Metasilicic acid is easier to be enriched in places with better fracture development and more CO2 content in water.The quality of groundwater rich in strontium and metasilicic acid is generally poor,and the utilization degree of the system is not sufficient. |
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