Department of Water Resources, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China.
School of Civil Engineering and Water Conservancy, Shandong University, Qianfoshan Campus, No. 17923, Jingshi Road, Lixia District, Jinan City, 250014, Shandong Province, China.
Environ Sci Pollut Res Int. 2024 Jun;31(26):38323-38342. doi: 10.1007/s11356-024-33722-y. Epub 2024 May 27.
The water source reservoirs are the important urban water source in northern China. Although external pollution has been greatly improved, the internal pollutants in reservoirs continue to accumulate with the complex deposition and release processes, resulting in potential risks to water supply safety. To address the aforementioned issue, this paper proposed a simulation model of water quality named ECOlab EU1-WSR to simulate the spatio-temporal changes of water quality under the influence of internal pollution for the water source reservoirs. Based on the analysis of the water quality characteristics and the distribution of benthic vegetation in the reservoir, a three-dimensional hydrodynamic model was established based on MIKE3, the corresponding parameters and the related state variables were set, the ECOlab EU1-WSR model was established by secondly developing the original ECOlab EU1 template, and the real-time dynamic outputs of pollutant content in sediment were added to link the water quality index with sediment nutrition index for better revealing the impact of the internal pollution on the water quality. The performance of the model was evaluated by the case application on the water quality simulation of Daye reservoir and the optimization of the connection project between Daye reservoir and Xueye reservoir in Shandong Province China. The results showed that the model can accurately and simultaneously simulate the pollution in water and sediment by the comparative verification of hydrodynamics, water temperature, and water quality. Moreover, the model can effectively reflect the influence of the accumulation, deposition, and release of internal pollution on water quality by analyzing the correlation between the content of various pollution in water body and those in sediment, such as the total nitrogen and total phosphorus in the water body at the bottom of the water intake, were negatively correlated with the total nitrogen and total phosphorus in the sediments with correlation coefficients of 0.538 and 0.917, respectively. In addition, the optimal water inlet position and water flow rate of the connection project can be optimized and determined by using the model to effectively control water quality. The established model will be a useful tool for the design and management of a reservoir, the interconnection projects, and other water bodies by adaptively recoded.
水源水库是中国北方重要的城市水源。尽管外部污染已得到很大改善，但由于水库复杂的沉积和释放过程，内部污染物仍在不断积累，这对供水安全构成了潜在风险。针对上述问题，本文提出了一种名为 ECOlab EU1-WSR 的水质模拟模型，用于模拟水源水库内部污染影响下水体水质的时空变化。基于对水库水质特征和底栖植被分布的分析，基于 MIKE3 建立了一个三维水动力模型，设置了相应的参数和相关状态变量，其次是对原始 ECOlab EU1 模板进行开发，建立了 ECOlab EU1-WSR 模型，并添加了沉积物中污染物含量的实时动态输出，将水质指数与沉积物营养指数相联系，以更好地揭示内部污染对水质的影响。通过在中国山东省大冶水库水质模拟和大冶水库与薛野水库连接工程优化的实例应用对模型进行了性能评估。结果表明，该模型通过水动力、水温、水质的对比验证，可以准确、同步地模拟水体和沉积物中的污染。此外，通过分析水体和沉积物中各种污染物质含量之间的相关性，如水体底部总氮和总磷与沉积物中总氮和总磷之间的相关性，模型可以有效地反映内部污染的积累、沉积和释放对水质的影响，相关性系数分别为 0.538 和 0.917。此外，通过使用该模型可以优化和确定连接工程的最佳进水位置和水流速度，从而有效控制水质。该模型将成为水库设计和管理、连接工程以及其他水体的有用工具，可以通过自适应重编码进行优化。
