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研究黄河中游皇甫川流域水文连通性时空演变规律及其对生态工程的响应机制，为黄河中游生态脆弱区水资源管理与生态工程优化提供科学依据。基于2000—2022年遥感数据，采用修正的水文连通指数评估流域水文连通性，并利用Hurst指数分析其可持续性和未来变化趋势。同时，通过皮尔逊相关系数探讨了水文连通性对生态工程的响应。研究结果表明：2000—2022年，皇甫川流域水文连通指数年均值显著下降，从2000年的1.327下降到2020年的1.270，下降速率为0.028 5/a，空间上呈现“缓坡低、陡坡高”及“上游低、下游高”的分布特征，24.96%的区域呈现出显著减少的趋势；同期流域植被覆盖度显著增加，年均增长率为0.006/a，生态工程对水文连通性产生显著影响，46.96%的区域呈负相关，其中强负相关区域占34.90%；未来预测显示，流域内17.94%的区域水文连通性将显著下降，71.98%的区域将表现为随机变化，反映出未来变化的复杂性与不确定性。
Abstract：In this study, the Huangfu River basin, located in the middle reaches of the Yellow River,was selected for research, and we explored the spatial and temporal evolution of hydrological connectivity in the basin as well as its response to ecological engineering. Hydrological connectivity was assessed using a modified hydrological connectivity index and the influence of ecological engineering on hydrological connectivity was analyzed using Pearson correlation. Further, the sustainability and future hydrological connectivity were analyzed using the Hurst index. The study was based on remote sensing data from the China Land Cover Dataset(CLCD) and Digital Elevation Model(DEM) data for the study area from 2000 to 2022. The fractional vegetation cover(FVC) was used to indicate ecological engineering projects. Our findings revealed a significant decline in the annual average hydrological connectivity index from 1.327 in 2000 to 1.270 in 2020, an average decrease of 0.028 5/a. Spatially, hydrological connectivity exhibited distinctive patterns, characterized by lower connectivity on gentle slopes,higher connectivity on steep slopes, and increasing connectivity from upstream to downstream. During the study period, there was a significant decrease in hydrologic connectivity in approximately 25.0% of the basin area. FVC increased markedly, at an average annual rate of 0.006/a, indicating the effectiveness of ecological engineering measures. Pearson's correlation analysis revealed negative correlations between ecological engineering and hydrological connectivity across 46.96% of the basin, with strong negative correlations in 34.90% of the area. Projections of future connectivity suggest a significant decline in hydrological connectivity in 17.94% of the basin area, whereas 71.98% of the area is expected to exhibit random fluctuations, underscoring the complexity and uncertainty of future hydrological conditions. These findings provide scientific support for decision-making in ecological management and for optimizing ecological engineering projects in the middle reaches of the Yellow River and similar basins.
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基本信息:
DOI：10.15928/j.1674-3075.202408100001
中图分类号:TV213.4;X143
引用信息:
[1]邓椿,孙维峰,武荣伟.皇甫川流域水文连通性时空演变及其对生态工程的响应[J].水生态学杂志,2025,46(06):93-104.DOI:10.15928/j.1674-3075.202408100001.
基金信息:
山西省运城盐湖保护利用研究院揭榜挂帅项目（YHYJ-2023007）; 2023年度山西省哲学社会科学规划课题（2023YY291）