Calculation of Pollutant Carrying Capacity in Shaanxi Section of Weihe River in China

Abstract

Abstract At present, in the calculation of water pollution carrying capacity, only the guarantee rate of the driest month is 90% to calculate it. The water pollution carrying capacity of the water function area is relatively small, so it is more stricter to control the total amount of pollutants on this basis, and the actual water pollution carrying capacity is not fully utilized, which will form a significant constraint on the social and economic development. Moreover, it is inconvenient to assess the actual water environment management by using the annual pollution capacity obtained by this method. Therefore, this paper takes Shaanxi section of Weihe River in China as an example to calculate the pollutant carrying capacity under different guarantee rates, taking COD and NH3-N as the representatives of organic pollutants, and taking the national standard pollutant carrying capacity calculation model as a means to reflect the river’s pollutant carrying capacity under different guarantee rates, so as to provide reference for the comprehensive treatment of water environment in Weihe River basin.