平原地区城市河网水环境改善的补水调度策略研究——以天津市中心城区河网为例

针对平原地区城市河网中存在的补水效果差、水质不达标等水环境问题,采取问题解析-方法优化的思路开展河网水环境改善的补水调度策略研究,提出了融合现状模拟和成因分析、补水调度策略验证、补水调度实施方案的研究思路。以天津市中心城区环城河网进行实例应用,基于现状问题解析揭示了河网水质不达标原因,按照保持现有工程措施及增设工程措施的顺序提出了适用的推荐补水调度策略,并基于推荐补水调度策略提出了年度整体实施方案及实际实施方案,其中年度整体实施方案对应的年度补水调度总需水量为3.19亿m3。研究表明本文提出的补水调度策略研究方法可利用有限的补水资源有效地改善水环境,可在其他平原地区城市河网中进行推广。

Study on water replenishment scheduling strategies for water quality improvement of urban river network in plain area: A case study of urban central river network in Tianjin

The urban river network in the plain area has various water environment problems such as poor water replenishment effect and deterioration of water quality. In order to solve these problems, we adopted the approach of problem analysis and method optimization to carry out the research on water replenishment scheduling strategies for water quality improvement of urban river networks. The approach included three parts: analyzing and evaluating the present situation, validating the strategies, and proposing implementation schemes. A case study of Tianjin City was carried out. Based on analysis of the current problem, we uncovered the reasons for the substandard water quality of the river network and put forward a set of water replenishment scheduling strategies. Based on the recommended strategies, we proposed an annual overall implementation scheme and an actual implementation scheme. The water demand of the annual overall implementation scheme was 319 million cubic meters. This study showed that the proposed research approach for water replenishment scheduling strategy could increase water utilization efficiency and improve water quality effectively. The approach can be applied to other river networks in plain areas.