| 王 婷,李永恒,杨淇越.河西走廊水资源与生态环境协调耦合时空演变分析[J].甘肃地质,2026,35(3):47-58 |
| 河西走廊水资源与生态环境协调耦合时空演变分析 |
| SPATIOTEMPORAL EVOLUTION OF THE COUPLING COORDINATION BETWEEN WATER RESOURCES AND THE ECOLOGICAL ENVIRONMENT IN THE HEXI CORRIDOR |
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| DOI： |
| 中文关键词: 水资源与生态环境 耦合协调度 时空演变 滞后效应 干旱区 河西走廊 |
| 英文关键词:water resources and ecological environment coupling coordination degree spatio -temporal evolution lag effect arid region Hexi Corridor |
| 基金项目:甘肃省自然资源厅科技创新项目（202408）。 |
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| 中文摘要: |
| 水资源与生态环境的协调发展是西北干旱区筑牢生态安全屏障的核心。 本文以河西走廊为研究区，系统测算了2000—2022年实测、2023—2025年趋势外推预测河西五市水资源与生态环境系统的耦合度（C）、综合发展水平（T）及耦合协调度（D），并深入剖析了其时空演变特征与驱动机制。 结果表明：（1）时序演变上，系统整体呈现显著的“倒U型”演化轨迹，2015年为历史分水岭。 2000—2015年各项指数在波动中攀升至峰值，但2015年后高水平协调区迅速萎缩，系统整体向失调方向演进。 （2）空间分异上，耦合协调度存在突出的空间异质性，总体表现为“东缓西剧”的退化态势。 地处西端的酒泉市与嘉峪关市受极端干旱与刚性用水挤占影响，协调度呈快速下降；中东部的张掖市、武威市和金昌市退化相对平缓，但“轻度失调”区仍在持续扩张。 （3）驱动机制上，2015年后的系统退化是气候暖干化加剧蒸散发与长时期地下水超采“滞后效应”叠加共振的结果，表明短期的地表生态恢复未能实质性扭转水资源底线的消耗。 本研究揭示了干旱区复合系统在多重胁迫下的深层脆弱性，可为河西走廊实施空间差异化的水生态管控与韧性水网建设提供科学依据。 |
| 英文摘要: |
| The coordinated and coupled development of water resources and the ecological environment is critical for building ecological security barriers in arid regions of Northwest China. Taking the Hexi Corridor as the study area, this paper systematically evaluated the coupling degree （C）, comprehensive development level （T）, and coupling coordination degree （D） of the water-ecology system in the five cities of the Hexi Corridor from 2000 to 2025, among which 2000—2022 are measured data and 2023—2025 are predicted by trend extrapolation with uncertainty ± 5.3% ，and deeply analyzed their spatio -temporal evolution characteristics and driving mechanisms. The results indicate that: （1） In terms of temporal evolution, the system exhibited a
significant "inverted U -shaped" trajectory, with 2015 serving as a historical watershed. The indices fluctuated upward and peaked in 2015, but subsequently, high -level coordination areas rapidly shrank, and the overall system degraded towards an disordered state. （2） In terms of spatial differentiation, the coupling coordination degree showed prominent spatial heterogeneity, generally characterized by a degradation trend of "moderate in the east and severe in the west". Affected by extreme aridity and rigid water consumption, Jiuquan and Jiayuguan in the western part experienced a rapid decline in coordination; Zhangye, Wuwei, and Jinchang in the central and eastern parts showed relatively moderate degradation, but their "mildly uncoordinated" areas continued to expand. （3） In terms of driving mechanisms, the systemic degradation post -2015 was the result of the superimposed resonance of increased evapotranspiration driven by climate warming -drying and the "lag effect" of long -term groundwater over -extraction, indicating that short -term surface ecological restoration failed to substantively reverse the depletion of underlying water resources. This study reveals the deep -seated vulnerability of the complex system in arid regions under multiple stresses, providing a scientific basis for implementing spatially differentiated water-ecology management and building resilient water networks in the Hexi Corridor. |
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