基于服务流的石羊河流域水供给服务关键区域识别

生态系统服务功能关键区识别对于区域生态系统服务功能提升和可持续发展精准高效施策有重要意义。以石羊河流域为研究单元,在探究2005、2010、2015和2020年水供给服务的供给与使用时空特征的基础上,利用水供给服务流模型模拟得到水供给服务空间流动情况,利用ZONATION模型识别出2020年石羊河流域水供给服务关键区域。结果表明: 2005—2020年,石羊河流域水供给服务的供给表现出南高北低的空间格局与逐步衰退的总体趋势,水资源使用呈现出耕地和工业用地为主导的空间格局和波动下降的变化趋势,流域每年有约10.8%的区域在得到上游水资源补给后需水缺口得以回补。2020年,石羊河流域水供给服务关键区域总面积为14455 km²。我们建议应从供给-流转-消耗的角度,有针对性地修复和提升关键区域保水、促流和节水能力。

Identification of crucial areas of water supply service in Shiyang River Basin based on service flow

The identification of crucial areas of ecosystem service is of great significance for accurate implementation of sustainable development measures and the improvement of regional ecosystem service. Taking Shiyang River Basin as a research unit, we analyzed the spatio-temporal variations of the provision and consumption of water supply services in 2005, 2010, 2015, and 2020. The water supply service flow model was used to quantitatively simulate water supply service flow. The ZONATION model was selected to identify the crucial areas in the Shiyang River Basin in 2020. The results showed that the provision of water supply services in the Shiyang River Basin showed a spatial pattern being high in the south and low in the north from 2005 to 2020, which declined gradually with time. The consumption showed a spatial pattern dominated by cultivated land and industrial land and temporal change with a downward trend in fluctuation. Each year, about 10.8% of water demand gap could be made up by replenishing upstream water resource. In 2020, the crucial areas of water supply service in Shiyang River Basin were 14455 km². We proposed management strategies to repair and improve the capacity of water conservation, flow promotion, and water conservation in crucial areas from the perspective of provision, transmission, and consumption.