人民长江2025，Vol.56Issue(7)：76-83,8.DOI:10.16232/j.cnki.1001-4179.2025.07.010
长江源区水源涵养能力多尺度时空变化特征研究
Research on multi-scale spatiotemporal variation characteristics of water conservation capacity in source region of Yangtze River
摘要
Abstract
The Source Region of the Yangtze River(SRYR)serves as a crucial water conservation functional zone within the Yangtze River Basin and a vital ecological security barrier for China.Revealing the spatiotemporal variation patterns of Water Con-servation Capacity(WCC)and its influencing factors in the SRYR is essential for advancing ecological conservation and restora-tion projects,sustaining ecological functions of the SRYR,and safeguarding river-lake health.This study applied a SWAT hydro-logical model to simulate hydrological processes in the SRYR and employed statistical and geostatistical methods to quantitatively identify multi-scale spatiotemporal variation characteristics and primary influencing factors of WCC in the SRYR.The results showed that:① During1963～2020,annual precipitation,actual evapotranspiration,runoff,and water yield in the SRYR exhibited significant increasing trends,with rates of 1.35,1.00,0.12 mm/a and 0.36 mm/a,respectively.Although annual WCC showed an insignificant increase trend at 0.24 mm/a,both annual and interannual variations of WCC were highly pronounced,with WCC predominantly concentrated in autumn and warm seasons.② WCC demonstrated an upstream-to-downstream increasing gradi-ent spatially.The Tongtian River recorded the highest WCC,followed by the Dangqu River,while the Chumaer River and Tuotuo River had the lowest capacities.③WCC was primarily governed by the comprehensive effects of precipitation,water yield,ground-water runoff,drought index,evapotranspiration potential,and land use types.The research results can provide scientific references for water resources management and ecological conservation in the Yangtze River Basin.关键词
水源涵养能力/降水量/蒸散发量/径流量/产水量/时空特征/SWAT模型/长江源区Key words
water conservation capacity/precipitation/evapotranspiration/runoff/water yield/spatiotemporal characteristics/SWAT model/source region of the Yangtze River分类
资源环境引用本文复制引用
任化准,吴光东,束龙仓..长江源区水源涵养能力多尺度时空变化特征研究[J].人民长江,2025,56(7):76-83,8.基金项目
中央级公益性科研院所基本科研业务费项目(CKSF20241012/SZ) （CKSF20241012/SZ）
国家重点研发计划项目(2022YFC3201700) （2022YFC3201700）
国家自然科学基金项目(52009006) （52009006）
