Chang'an Cuihuashan, Chemical Composition Of The With Shaoling Highland Water

Many researches have been conducted on water chemistry composition in china,but the main purpose of the study is to develop and exploit water resources,in accordance with the single karst water and river water,so as to study the change of one year was so litter.There is significant difference along with other areas,because of low-mountain landscape which some developed gneiss stratigraphic and the loess landscape which developed stratigraphic about 100 million years,which provied a good study for the comparative study.Through one year continuous observation the water chemistry,the seasonal,annual changes of water chemical composition and hydrochemistry type were mastered.which has important scientific significance on Chemical composition of groundwater and river water sources and changes regulation,as well as chemical characteristics of water,This research has practical significance on thescientificly and rationally development and utilization of local water resources and tourism reseources and environmental protection.Through contunious observation and date analysis in Cuihua mountain and Shaoling tableland,following conclusions are got.(1) pH value change of the weat of spring in Cuihua Mountain is between 6.48 and 6.88;the annual mean number is 6.67,taking on a weak acidic character.The conductivity change of Huxi spring is between 154 and 203μs.cm^-1;the annual mean number is 179.9μs.cm^-1,in addition,the east of lake spring's pH and conductivity is higher in autumn than in winter(2) pH value change of loess karst spring in Yangwan village is between 7.24 and 7.96;the annual mean number is 7.56,taking on a weak alkaline character.The conductivity change of loess karst spring is between 642 and 820μs.cm^-1;the annual mean number is 766.9μs.cm^-1;loess karst spring's pH and conductivity is larger in sping and winter than in summer and autumn(3) pH value change of river in Cuihua Mountain is between 7.39 and 8.68,taking on a weak alkaline character.The conductivity change of river in Cuihua Mountain is between 174 and 337μs.cm^-1;The river's pH and conductivity is higher in sping and winter than in summer and autumn;(4) The main reasons which have caused the changes in ph of the spring's in Cuihua mountain and Shaoling tableland are precipitation,water temperature and Carbon Monoxide Concentration in soil.The pH is lower when the precipitation,water temperature and Carbon Monoxide are high in summer and sutumn,otherwise,the precipitation,water temperature and Carbon Monoxide are lower in spring and winter.The determing main factor of changes in the conductivity is the cationic content in river,to some extent,Carbon Monoxide concentration and precipitation are also influential on the changes of electrical conductivity(5) The content of pH,HCO₃^-,Ca²⁺,Mg²⁺,etal in west of lake spring in Cuihua Mountain is lower than in loess karst spring in Yangwan village.but The content of SO₄^2- in Cuihua Mountain is larger than in loess karst spring in Yangwan village.There are two main reason in difference:one is the difference in the development of vegetation,The pH and the content of ions are lower in Cuihua mountain,which the vegetations grow well.the pH and the content of ions are high in loess karst spring in Yangwan village,which the vegetations grow poor.the other is water pass difference acidity and basicity soil layers and stratum.The weat of Lake spring flows through gneiss stratigraphic,loess karst spring in Yangwan village flows through Loess Stratum(6) The water content of pH,HCO₃^-,SO₄^2-,Ca²⁺,Mg²⁺,etal in Cuihua Mountain gate is lower than in the eastern of Taiyi.The different reasons in two observation point are followings.Firstly,the river after some distance would dissolved the chemical elements from the surrounding rock,so that making the ion content of water increased in river.Secondly,the polluted water has attracted the change of ions content after the flow of water in the process(7) The hydrochemistry type are HCO₃^--SO₄^2--Ca²⁺ in Cuihua mountain and HCO₃^--Ca²⁺-Mg²⁺ in loess karst spring in Yangwan village.The cations and anions of water chemical composition in Cuihua mountain and Shaoling tableland close up HCO₃^- end-member and Ca²⁺ end-member,which indicate that the carbonate dissolution may play most important role in the above dissolution process in Cuihua mountain and Shaoling tableland...