闽江干流下游河段纳污能力的研究

Receiving Ability for Pollution into Lower Reaches of Minjiang River

建立闽江干流下游河段二维非稳态水质水量模型,根据2004年实测资料对模型中的水质参数进行率定;对各排污口进行概化,应用模型模拟出闽江干流下游河段浓度场,并得出排污口混合带长度与排污量的响应关系;根据概化排污口在限定混合带长度下的平均纳污能力扩展到有效纳污能力计算长度后得到整个水体的纳污能力。经计算,闽江干流下游河段对COD的纳污能力为58195t/a。

An unsteady water quality and hydrodynamic model was developed for lower reaches of Minjiang River. The degradation parameters of water quality were calibrated based on measured data, and with calibrated parameters, the concentration profile was counted out. The length of contaminated zone was clear, sewage discharge outlets were generalized and the counting length of receiving ability for pollution was computed according to the concentration profile. It was concluded that the receiving ability for CODcr pollution into lower reaches of Minjiang River is 58195t/a.