Groundwater Chemical Classification

The chemical research of groundwater has been the important part in the hydrogeological research field all the time. Among them, it is an actual work that classifies water based on its chemical characteristics. According to the difference of the work purpose, we can carry on various classifications to groundwater. This paper is carrying out based on the chemical materials of Huanhe group of cretaceous System of Erdos basin ,carrying on relativity analysis about TDS and three major anion percentage of MEQ (milligram equivalent) , Taking cluster analyses on TDS and the three anion percentage of MEQ, the trend analysis of the percentage of the number of fresh water and the total water with the increases of anion percentage of MEQ, Classifies the new index , divide the groundwater into three kinds according to percentage of MEQ of three major anion finally defining new groundwater water chemistry: Definitely bicarbonate type, relativity bicarbonate type and non-bicarbonate types, point out that the possibilities of fresh water reduce in proper order of these kinds. The full text divides into six chapter altogether, main content is successively:Chapter one Outline has introduced the source of the selected title of this thesis and research meaning, has explained the current situation in this research field, and the brief proposition main research content and research approach of the thesis.Chapter two through carrying on relativity analysis about TDS and three major anion percentage of MEQ, percentage analysis of ranking on three major anion, have defined the existence of dependence between TDS and three major anion , Classified and laid the foundation for following water chemistry.Chapter three is cluster analyses, Taking cluster analyses on TDS and the three anion percentage of MEQ as key element, 25 pieces of fresh water sample will be divided into 3 kinds and be studied, find out the difference between different classes of water styles.Chapter four ,based on the trend analysis of the percentage of the number of fresh water and the total water with the increases of anion percentage of MEQ, have analyzed detailed that the influence increased and decrease of three major anion percentage of MEQ on TDS of groundwater, And find out the different influencing section on percentage of MEQ.Chapter five summarized the analysis results of the former three chapters, classify new index of groundwater water chemistry, finally defining new groundwater water chemistry: Definitely bicarbonate type, relativity bicarbonate type and non-bicarbonate types, and has verified with the materials of water analysis of the Luohe group.Chapter six is a conclusion part and is a summary of the former chapters' studies, is the research conclusions of this paper.