• 关键词：环境需水量  感潮河流  水质模型  敏感性分析  深圳河

• 基金项目：

• 秦华鹏
• 1. 北京大学深圳研究生院, 深圳 518055; 2. 深圳环境模拟与污染控制重点实验室, 深圳 518057

• 王晟
• 1. 北京大学深圳研究生院, 深圳 518055; 2. 深圳环境模拟与污染控制重点实验室, 深圳 518057

• 摘要：以深圳河为研究区域,应用一维非恒定水质模型计算了感潮河流的环境需水量,并针对污染负荷、补水水质、潮汐和污水厂尾水处置等因素对环境需水量的影响进行敏感性分析.结果表明,随着污染负荷和补水本底污染物浓度的增加,环境需水量分别成近似线性和指数函数增加;大、小潮时深圳河的环境需水量差别不大,但涨、落潮的影响却不能忽略;将污水厂尾水输送到流域外排放或将尾水资源化后作为河道补水可以大大减少环境需水量.因此,掌握环境需水量的变化规律,对于感潮河流水环境综合治理中截污、补水、污水厂尾水处置等方案的决策具有重要的指导意义.

• Abstract：As a case study, a quality model of one-dimensional unsteady water was employed to compute the environmental water demand in the tidal river based on Shenzhen River. Asensitivity analysis was carried out to investigate the effects of pollution loading, supplemental water quality, tides and the disposal of effluent from wastewater treatment plants on the environmental water demand. Results showed that, the environmental water demand almost linearly increased with the pollution loading, and exponentially increased with the pollutant concentration of the supplemental water. It was found that there were not significant differences between the environmental water demands during spring and neap tides for Shenzhen River, while the impact of flood and ebb tides on the environmental water demand cannot be neglected. And results also indicated that the environmental water demand would greatly decrease if the effluent from wastewater treatment plants was transferred out of the Shenzhen River basin, or further purified and reused in the river. This study clearly demonstrated that understanding the variance of environmental water demand in tidal river would be helpful for decision-making of comprehensive pollution control measures, such as wastewater interception, water supplement and disposal of wastewater treatment plants.

• Key words：environmental water demand  tidal river  water quality model  sensitivity analysis  Shenzhen River

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