考虑不同保证率下的渭河陕西段纳污能力计算

Calculation of Pollutant Carrying Capacity in Shaanxi Section of Weihe River Considering Different Assurance Rates

摘要: 目前，在计算纳污能力时，用保证率90%计算的水功能区纳污能力偏小，以此为基础进行污染物总量控制是比较严格苛刻的，没有充分利用水域实际的纳污能力，从而对社会经济的发展将形成明显的制约影响。而且利用这种方法得到的年尺度下的纳污能力给实际水环境管理考核工作带来了不便。因此，本文以中国渭河陕西段为例，以COD和NH₃-N为有机污染物代表，计算了不同保证率下的纳污能力，并以国家标准纳污能力计算模型为手段，反映不同保证率下河流的纳污能力，为渭河流域水环境综合治理提供参考。

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 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 repre-sentatives of organic pollutants, and taking the national standard pollutant carrying capacity cal-culation model as a means to reflect the river’s pollutant carrying capacity under different guar-antee rates, so as to provide reference for the comprehensive treatment of water environment in Weihe River basin.