【摘要】 研究陕西省和城市水资源分布演变特征可为研究区水资源管理提供依据。运用经验模态分解(EMD)方法、M-K检验法、小波变换、空间自相关分析方法，探究1994—2021年研究区不同尺度下水资源的时空演变规律。结果表明：全省尺度下陕西省水资源总量和地表水资源量呈现先减少后增大的不显著增长趋势，水资源趋势变化突变点主要出现在2004年前后，主要存在6和16 a的周期，地下水资源量呈现下降趋势，存在3个周期。分区尺度下，陕北地区演变特征较为独特，其余地区与全省水资源变化特征相似。城市尺度下，延安市水资源演变规律较为独特，关中地区不同城市水资源演变规律呈现东西差异。陕西省水资源分布存在空间集聚特征，陕南地区城市间出现热点集聚，关中地区北部及陕北地区出现冷点集聚，且集聚程度呈增加趋势。研究结果可为陕西省水资源安全及黄河流域生态保护与高质量发展提供科学依据。更多还原

【Abstract】 The change of natural environment and enhanced human activities have a certain impact on the spatio-temporal distribution and variations of water resources in Shaanxi Province. In this study, the empirical mode decomposition(EMD), M-K test, wavelet transform and spatial autocorrelation analysis are combined to analyze the spatio-temporal distribution and variations of water resources in Shaanxi Province from 1994 to 2021 on different spatial scales. The results show that the total water resources and surface water resources in Shaanxi Province showed a non-significant growth trend as a whole, which first decreased then increased. The abrupt change of water resources trend occurred around 2004, mainly in a 6-year and 16-year cycle. The amount of groundwater resources showed a downward trend, with three cycles. On the zoning scale, northern Shaanxi presented a unique variation pattern, whereas the rest of the zones were consistent with the provincial water resources. On municipal scale, the distribution and variations of water resources in Yan’an City was quite different from the other cities, which mainly exhibited a difference from east to west. The distribution of water resources in Shaanxi Province was characterized by spatial agglomerations, with high value agglomerations in southern Shaanxi and low value agglomerations in Guanzhong and northern Shaanxi, and the degree of agglomeration kept increasing. Exploring the temporal and spatial distribution and variation characteristics of water resources can provide a scientific basis for water resources security in the study area, also promote ecological protection and high-quality development of the Yellow River Basin.更多还原