The Shallow Groundwater Pollution's Assessment of West Liaohe Plains

West Liaohe River Plains is an important food base in China,and the groundwater is the main resource of water supply.Because of the effect of industrial and domestic pollution and the application of fertilizer and pesticide in agriculture,the groundwater has been polluted to a certain extent.This paper analyzes carious methods of groundwater pollution evaluations,improves the method of single factor pollution,and proposes the single index pollution standard.The author carries out the survey in the west Liaohe Plains,and collects 390groundwater samples.Every sample is tested 79indicators(including 7live tests).According to the date's analysis,we choose 34items evaluated,such as iron,fluorine,nitrogen and organic projects.This paper uses the single factor pollution index method to evaluate the groundwater pollution of the eastern west Liaohe Plains,and analyzes the causes of groundwater pollution.According to the pollution's classification,the author classifies the pollution distribution range,and analyzes the reasons that lead to groundwater pollution.This paper solves the contrast between the evaluation of regional pollution problems,it can directly reflect the regional groundwater pollution,and provides a basis for the management of groundwater pollution.