Lv Chunlan, Chen Yanli, Huang Qian
School of Economics and Management, Yibin University, Yibin, 644007, People's Republic of China.
College of Management Science, Chengdu University of Technology, Chengdu, 610064, People's Republic of China.
Sci Rep. 2025 Jun 4;15(1):19569. doi: 10.1038/s41598-025-03670-9.
Global warming and the excessive exploitation of water resources have raised significant concerns regarding water scarcity and the degradation of aquatic ecosystems. To enhance integrated water resource management, a multi-objective optimization model integrated water allocation and water quality has been developed, in which there are trades-off between average economic benefit efficiency maximization and social welfare for long-term sustainability. In the social welfare maximization objective, an adapted Bentham-Rawls criterion is incorporated to addresses intergenerational trade-offs in high-quality water resource allocation, and the overlapping generations structure is employed to analyze the intertemporal dynamics of water pollution, thereby alleviating the conflicts between economic growth and environmental quality in the basin. Besides, total economic efficiency maximization objective is also important as it ensures the effective utilization of water resources. Using the heavily polluted Tuojiang River basin in China as a case study, the feasibility and rationality of this model have been demonstrated. Scenario analysis further validates the model's effectiveness and explores the impacts of varying control parameters. Results indicate that improving sewage treatment capacity, reducing water pollution accumulation, and accounting for the reasonable needs of future generations for high-quality water can promote the sustainable development of the basin. Compared with the previous models, the proposed optimization model is capable to increase the social welfare by 13.83% and total economic efficiency by 15.97%.
全球变暖和水资源的过度开发引发了人们对水资源短缺和水生生态系统退化的重大担忧。为了加强水资源综合管理，开发了一个综合水资源分配和水质的多目标优化模型，该模型在平均经济效益效率最大化和社会福利之间进行权衡，以实现长期可持续性。在社会福利最大化目标中，纳入了一种适应性的边沁-罗尔斯标准，以解决优质水资源分配中的代际权衡问题，并采用世代交叠结构来分析水污染的跨期动态，从而缓解流域内经济增长与环境质量之间的冲突。此外，总经济效率最大化目标也很重要，因为它确保了水资源的有效利用。以中国污染严重的沱江流域为例，验证了该模型的可行性和合理性。情景分析进一步验证了模型的有效性，并探讨了不同控制参数的影响。结果表明，提高污水处理能力、减少水污染积累以及考虑后代对优质水的合理需求，可以促进流域的可持续发展。与以前的模型相比，所提出的优化模型能够使社会福利提高13.83%，总经济效率提高15.97%。
