Analysis of Groundwater Environmental Conditions and Influencing Factors in Typical City in Northwest China

摘要

The groundwater in the research area is characterized by alkalescence,generally over-high EC value,and relatively low dissolved oxygen and oxidation-reduction potential.The pollution is presented by abnormal acid-base,dissolved oxygen reduction,and conductivity rise.The overall situation of groundwater chemical field is controlled by natural conditions,the hydrochemical type has obvious zoning feature and changes from single type to multiple types from the river bank of the Yellow River to both sides,and the local abnormality is closely related to the intensity of human activities.The pollution scope and degree of inorganic toxicological indexes and organic indexes are strongly correlated with land utilization type,pollution source distribution,urbanization,and pollutant disposal of the city,the pollution in the petrochemical industrial area is the most serious,and the organic pollution tends to escalate and diffuse to the downstream.