Abstract
Through the analysis of the water quality evaluation and the change of main pollutants along the course of 13 national control monitoring sections of Weihe river main stream ( Shaanxi section ), the theoretical basis is provided for the formulation of effective prevention and control measures. The chemical oxygen demand (COD) and ammonia nitrogen (NH3-N) were determined by investigating and collecting water samples, and the trend curves of cod and NH3-N pollution were drawn. Results from 2006 to 2009, the main stream of Weihe river ( Shaanxi section ) 13 In addition to the water quality of the four sections from linjia village to changxingqiao, the water quality of the other nine sections exceeds the water quality function standard, and the water quality is worse than grade v, the pollution is very serious. Promote the Weihe river (Shaanxi section) industrial structure adjustment, strict sewage standards, strengthen the sewage treatment plant and urban environmental protection infrastructure construction and other five aspects of prevention and control measures.
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