| 摘要: |
| 为探究南宁市水源涵养服务时空演变规律及其背后的驱动机制，从而为南宁市水资源的合理利用与可持续发展提供科学依据，本研究基于InVEST模型，在充分考虑气候、地形、植被、土壤和土地利用面积等因素的情况下，采用水量平衡和空间自相关分析方法，以栅格为研究单元，定量评价分析2000—2020年南宁市水源涵养服务及其时空变化特征，并使用地理探测器探讨水源涵养量变化的关键驱动因子。结果表明，2000—2020年南宁市水源涵养量年际间波动幅度较大，并且在2020年出现退化的趋势；水源涵养量的空间分布具有异质性，呈现北部和中部较高、南部较低的分布格局，空间相关性强；土地利用类型是水源涵养量变化的主要影响因素，并且土地利用类型与降水量的交互作用对南宁市水源涵养服务空间分异的解释力最大。土地利用变化是南宁市水源涵养服务时空演变的关键驱动因子，建议在城镇化进程中优化土地利用结构，尤其加强生态用地的保护与恢复，以提升区域水源涵养能力。 |
| 关键词: 水源涵养服务 InVEST模型 空间自相关 地理探测器 南宁市 |
| DOI：10.13657/j.cnki.gxkxyxb.20260819.005 |
| 投稿时间：2025-09-24修订日期：2025-11-04 |
| 基金项目:国家自然科学基金项目(42071135)资助。 |
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| Analysis of Spatiotemporal Changes and Driving Factors of Water Source Conservation Services in Nanning City Based on the InVEST Model |
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LAI Jiayang1,2, HU Baoqing1
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| (1.Key Laboratory of Environmental Change and Resources Use in Beibu Gulf (Nanning Normal University), Ministry of Education, Guangxi Key Laboratory of Earth Surface Processes and Intelligent Simulation, Nanning Normal University, Nanning, Guangxi, 530001, China;2.School of Geography and Planning, Nanning Normal University, Nanning, Guangxi, 530100, China) |
| Abstract: |
| This study explores the spatiotemporal evolution patterns of water conservation services in Nanning City and their underlying driving mechanisms,so as to provide a scientific basis for the rational utilization and sustainable development of water resources in Nanning City.Based on the InVEST model,this study fully considers factors including climate,topography,vegetation,soil and land use.Taking grids as research units,the water balance method and spatial autocorrelation analysis were adopted to quantitatively evaluate and analyze water conservation services and their spatiotemporal variation characteristics in Nanning City from 2000 to 2020.Furthermore,the key driving factors governing variations in water conservation capacity was identified by the geodetector model.The results showed that the water conservation capacity of Nanning City exhibited obvious inter-annual fluctuations and a degradation trend in 2020.The spatial distribution of water conservation quantity exhibits heterogeneity,showing a pattern of high values in the northern and central regions and low values in the southern region,with strong spatial correlation.Land use type was the dominant factor affecting the variation of water conservation capacity,and the interactive effect between land use type and precipitation exerted the strongest explanatory power for the spatial differentiation of water conservation services in Nanning City.Land use change constitutes a key driving factor for the spatiotemporal evolution of water conservation services in Nanning City.It is suggested to optimize land use structure in the process of urbanization,and particularly strengthen the protection and restoration of ecological land to improve the regional water conservation capacity. |
| Key words: water conservation services InVEST model spatial autocorrelation geographic detector Nanning City |
