The Dual Effect of Reclaimed Water Replenishment in an Urban Lake: Hydrodynamic Enhancement Versus Phosphorus Risk
- DOI
- 10.2991/978-94-6239-682-1_16How to use a DOI?
- Keywords
- Reclaimed water; Ecological Replenishment; Numerical Simulation; Pollutant-specific response; Eutrophication risk
- Abstract
The application of reclaimed water can be used as an important avenue of encouraging the utilization of wastewater resources and maintaining water ecological safety. This presented work centered on Tangxun Lake which is the biggest urban lake in Asia created an innovative coupled two-dimensional hydrodynamic -water quality numerical model of the basin. The model was calibrated and tested with measured data, with high reliability, and simulation errors of COD, NH3-N, TN and TP all less than 35%. Systematically, the feasibility of the treated effluent of the wastewater treatment plant being considered as the replenishment source was evaluated and different possible replenishment situations were modeled. It could be observed that ecological replenishment has a significant positive influence on the hydrodynamic conditions of the lake bays, and the flow velocity of the Hongqi Lake Bay increased by as much as 17.5%. The improvements in the water quality had strong pollutant-specific features: it was noted that the process of dilution and degradation caused efficient reductions in TN, COD and NH3-N concentrations. Nonetheless, the high TP concentration of the tail water caused more severe phosphorus pollution of the lake, which indicated that the replenishment of reclaimed water has a double-edged sword effect on the probability of eutrophication. The current study offers scientific evidence and optimization of the planning and risk management of such projects.
- Copyright
- © 2026 The Author(s)
- Open Access
- Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.
Cite this article
TY - CONF AU - Xiaomin Chen AU - Shangwen Jiang AU - Yingjian Chen PY - 2026 DA - 2026/06/30 TI - The Dual Effect of Reclaimed Water Replenishment in an Urban Lake: Hydrodynamic Enhancement Versus Phosphorus Risk BT - Proceedings of the 2025 7th International Conference on Civil Architecture and Urban Engineering (ICCAUE 2025) PB - Atlantis Press SP - 151 EP - 164 SN - 2589-4943 UR - https://doi.org/10.2991/978-94-6239-682-1_16 DO - 10.2991/978-94-6239-682-1_16 ID - Chen2026 ER -