Study On Salt Lake In Jilantai Based On Isotope And Hydrochemical Characteristics

With the unceasing change of climate and rapid development of economy,serio us destruction of ecological environment control area,living in the production of all sorts of problems produced by water is intensifying,and provide theoretical basis fo r further to explore the rational utilization of water resources,finally realizes the reg ion of jilantai salt lake,water,natural and harmonious development of the economy.Paper la shan in Inner Mongolia as the research object of jilantai salt lake,within the territory of JiLanTai Town in groundwater,surface water,atmospheric precipitation based on the determination of hydrogen and oxygen stable isotopes,and the ion of Yin and Yang,all collected samples using piper diagram method,the coefficient method,system research of jilantai salt lake and the surrounding of isotope and ion distribution.1.The precipitation line in the jilantai region(8D=4.22?18O-16.31R2=0.58)is located at the lower right of the global precipitation line(?D=8818O+10R2=1),the slope and intercept are smaller than the global precipitation line,showing the characteristics of isotopic composition of precipitation in the arid region,?D and?18O are negatively correlated with the temperature,and decrease with the increase of temperature.?Dand?18O were positively correlated with rainfall,and increased with the increase of rainfall.The results show that the atmospheric precipitation in the kelantai region is affected by the evaporation and the isotope fractionation process takes place.2.The values of different water bodies 8Dand?18O are negative.The value of hydrogen and oxygen isotopes in deep groundwater is the smallest,followed by shallow groundwater,Yellow River water and reservoir water.In the flow process of groundwater from helan mountain to kelantai basin,the law of change is the same between ?Dand?18O,and the trend of increase is generally along the flow direction between ?Dand?18O.In addition,one of the recharge sources of shallow groundwater near the Yellow River is the lateral seepage of the Yellow River.3.Na+andK+are the main cations in the lake water in the study area,and the anions in the lake water are mainly SO42-,and the hydrochetical type is Na+andK+-SO42-.The dominaltcations in shallow and deep groundwater are Na+,and the cations are close to the Na+K+line,which is consistent with the cations in lake water.The anions in shallow groundwater and deep groundwater are mainly derived from Cl-dissolved in rock salt.Most of the anions are close to Cl--SO42-line,and some are close to HCO3-+CO32-terminal element.The hydrochemical types are all Na+-Cl--SO42-.Salt lake groundwater outside Gibbs' model is influenced by human activities and cation exchange.