黄河流域产水服务供需时空演变特征OA

This study quantitatively assessed the evolutionary characteristics of the supply,demand,and supply-demand matching of water production services in the Yellow River basin using the InVEST model's water production module,quota method,and spatial autocorrelation analysis based on multi-source data from the year 2000 to 2023 in order to uncover the law of water supply-demand balance in the basin and support accurate regulation of water resources.The results indicate that:(1)During the study period,the average annual water production in the basin ranged from 45.67 mm to 93.11 mm,highlighting a"fluctuating increasing"trend,with a spatial pattern of"high in the south and low in the north,high in the upper reaches and low in the middle and lower reaches";(2)Water demand presented a"first increasing and then stable"characteristic,with the proportion of agricultural water demand decreasing from 75.1%to 60.9%and domestic water demand increasing by 215%,and spatially,water demand in the middle and lower reaches was significantly higher than that in the upper reaches;(3)The average supply-demand index(SDI)ranged from-0.396 to-0.152,indicating a state of"supply less than demand"with spatial differentiation characterized by"local overload in the upper reaches,extreme imbalance in the middle reaches,and continuous deficit in the lower reaches";(4)Water supply and demand showed significant spatial autocorrelation.Spatially,the"high-high"type agglomerated in the humid zone of the upper reaches in the southwest,the"low-high"mismatched areas concentrated in cities,towns,and irrigation areas in the middle and lower reaches with industrial transfer,and the"high-low"type stably distributed in ecological protection areas,highlighting the features of spatial differentiation between supply and demand.This study can offer a scientific foundation for the coordinated management of water resources as well as ecological preservation and restoration in the Yellow river basin.