A coupled surface water-groundwater multi-objective optimization framework for coordinated water-ecosystem-agriculture management in arid inland river basin

作者：Danhong Chen, Xiankui Zeng, Dongwei GUI, Dong Wang, Jianmin Wu · 发表于：Hydrology and earth system sciences · 年份：2026 · DOI：10.5194/hess-30-3741-2026 · 研究领域：Water resources management and optimization、Hydrology and Watershed Management Studies、Groundwater and Watershed Analysis

Abstract. In arid regions, water is the key link sustaining both production and ecosystems, and its sustainable management is essential for regional security. This study constructs a coupled surface water-groundwater hydrology-agriculture multi-objective optimization model for the mainstream area of the Tarim River Basin, in which the NSGA-III algorithm is applied to optimize four objectives, including agricultural economic benefit per unit of irrigation water (fAB), groundwater level rise (fGL), terminal lake area (fLA), and total agricultural nitrogen load (fTN). Based on the optimized solutions, the trade-offs and synergistic pathways among multiple objectives within the water-ecosystem-agriculture system are systematically evaluated under different hydrological year conditions. The results indicate that significant trade-offs exist among objectives, with fAB showing negative relationships with fTN and fLA, and solutions with higher economic benefits generally accompanied by reduced ecological water supply and increased nitrogen loads. The spatial heterogeneity of the basin necessitates the adoption of differentiated management strategies, whereby upstream areas with relatively stable water availability can sustain higher levels of agricultural production, while midstream and downstream areas are highly sensitive to ecological water constraints and therefore require priority allocation to ecological water use. The optimization results show that cultivated land area should ...