黄河兰州段水污染物规划环境容量和排污总量控制研究

黄河甘肃河段,按水域功能划分为水源保护区、准水源保护区和综合功能区三个串联的功能河段。本研究提出各河段水环境规划容量新概念和排污总量控制方案。河段环境容量的计算,是以有机污染指标COD为例,在美国“PDM-PC模型”的基础上,简化边界条件后,重新推导建立了近似解析求解数学表达式。所得环境容量和规划环境容量都是在不同目标和不同达标概率的随机条件下连续的风险环境容量系列值,为总量控制和环境决策提供了更多的选择余地。

Study on the Planned Enviromental Capacities of Water Pollutants and the Control of Total Amount of Discharged Sewage at Lanzou Section of the Yellow River

According to the water function, the section of the Yellow River in Gansu is divided into three series sectors, the water resource protection sector, the para-resource protection sector and the comprehensive functional sector. A new conception of planned water environmental capacity of each sector and a scheme for the control of total sewage discharge were proposed. Taking COD, the idicator of organic pollution, as an example, the author calculated the environmental capacities of the sedors based on the U. S. "PDM-PC model", which was simplied for the boundary condition to form an approximate analytic formula. The results thus reckoned from the formula and the planned environmental capacities are both continuous risk values of environmental capacities on the random conditions of different objectives and different probabilities. And these provide more choices for the overall control of sewage discharge and environmental policy-making.