Objective This study aims to explore the spatiotemporal evolution characteristics of water and land resource utilization efficiency and their driving factors in the Yellow River Basin, thereby providing a scientific basis for formulating precise and effective water and land resource management strategies. Methods The logarithmic mean Divisia index (LMDI) model was applied to investigate the regional differences in the utilization efficiency of water and land resources and their influencing factors in the nine provinces and autonomous regions along the Yellow River from 2010 to 2022. Results (1) From 2010 to 2022, the total water consumption in the Yellow River Basin had a net increase of 2.576×109 m3, and construction land had a net increase of 5 992.70 km2. The water quota effect and industrial structure effect inhibited water consumption, while the economic scale effect and population effect promoted water consumption growth. The intensity of construction land consumption inhibited land expansion, and the economic scale effect was the dominant factor driving the expansion of construction land. (2) The intensity of water consumption showed a spatial distribution pattern of “middle reaches > upper reaches > lower reaches”, with the middle reaches exhibiting the most significant increase in water consumption due to a higher proportion of the primary industry. The expansion of construction land presented a spatial pattern of “lower reaches > upper reaches > middle reaches”, with the fastest expansion rate of construction land observed in the economically developed regions of the lower reaches. (3) The elasticity coefficient of water consumption due to the COVID-19 pandemic from 2019 to 2020 was 0.65. The pandemic elasticity coefficient of construction land was 0.18. Investment and construction activities nearly came to a halt during the pandemic, but after the pandemic, the boosting effect of increased water consumption and construction land area on economic growth became apparent, gradually recovering and reaching historical peak levels. Conclusion The growth of water and land resource consumption in the Yellow River Basin is affected by multiple driving factors. Improvements in water resource utilization efficiency and reductions in the intensity of construction land consumption have played a certain inhibitory role in the consumption of both resources. The research findings provide a scientific basis for formulating differentiated management policies for water and land resources.
指数分解法(Logarithmic Mean Divisia Index, LMDI)是衡量各个影响因子对于目标变量影响强度的研究方法,它分解完全无残差,各因素贡献之和等于总变化,能够处理零值和负值问题,使乘法分解与加法分解结果一致,有效解决传统分解方法中普遍存在的残差项问题。LMDI模型基于对数平均权重的数学框架,保证分解结果的唯一性和可逆性,在处理多时期动态分析时表现出较好的时间一致性特征。在实际应用中,LMDI模型已成为驱动因素识别、能源强度变化、归因分析以及产业结构调整效应评估的标准化工具,计算过程相对简便且结果直观,能够清晰识别各驱动因素的贡献程度。研究选择LMDI模型建立2010—2022年黄河流域各省区水资源和土地资源变化特征的分解模型,按驱动机制分解为若干影响因素的叠加组合[22]。水资源计算公式如下:
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