【摘要】 人类活动的加剧和极端天气事件的频发导致生态问题日益凸显,水源涵养作为生态循环的关键环节受到显著影响,目前对水源涵养时空演变机制的理解尚未明晰。通过分析哈尔滨市域2000-2020年水源涵养强度的时空演变特征以及驱动力及非线性关系,揭示了研究区水源涵养量的变化规律及其与土地利用类型和社会生态驱动因素之间的复杂关系。结果表明:(1)哈尔滨市域水源涵养量整体呈现先减后增的年际变化规律;(2)耕地与建设用地贡献超80%供给量,耕地受降雨与总体面积调整原因影响供水量呈V型波动,林地随降水增加及保护措施影响供给量稳增;(3)各驱动因子呈现阈值效应与多峰值非线性特征。研究结果可为哈尔滨市水资源管理和保护工作提供科学依据。更多还原

【Abstract】 The intensification of human activities and the increasing frequency of extreme weather events have exacerbated ecological problems, significantly affecting water conservation, which plays a crucial role in the ecological cycle. However, the spatiotemporal evolution mechanisms of water conservation remain insufficiently understood. This study investigates spatial and temporal variations in water conservation intensity, as well as the driving forces and their nonlinear relationships, in the Harbin metropolitan area from 2000 to 2020. The findings reveal the changing patterns of water conservation and its complex interactions with land use types and socio-ecological driving factors. The results indicate that( 1) the total water conservation in the Harbin area exhibited a trend of first decreasing and then increasing over time;(2)cropland and construction land together contributed more than 80% of the water conservation supply. The water conservation function of cropland showed a V-shaped fluctuation driven by precipitation and land area adjustments, while the water conservation of forest land steadily increased with rising precipitation and the implementation of conservation policies;(3) the driving factors demonstrated threshold effects and nonlinear multi-peak responses. These findings provide a scientific basis for water resource management and ecological protection in Harbin.更多还原