首页|Water budgets in an arid and alpine permafrost basin:Observations from the High Mountain Asia

Water budgets in an arid and alpine permafrost basin:Observations from the High Mountain Asia

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Ground freeze-thaw processes have significant impacts on infiltration,runoff and evapotranspiration.However,there are still critical knowledge gaps in understanding of hydrological processes in permafrost regions,especially of the interactions among permafrost,ecology,and hydrology.In this study,an alpine permafrost basin on the northeastern Qinghai-Tibet Plateau was selected to conduct hydrological and meteorological observations.We analyzed the annual variations in runoff,precipitation,evapotranspiration,and changes in water storage,as well as the mechanisms for runoff gen-eration in the basin from May 2014 to December 2015.The annual flow curve in the basin exhibited peaks both in spring and autumn floods.The high ratio of evapotranspiration to annual precipitation(＞1.0)in the investigated wetland is mainly due to the considerably underestimated'observed'precipitation caused by the wind-induced instrumental error and the neglect of snow sublimation.The stream flow from early May to late October probably came from the lateral discharge of subsurface flow in alpine wetlands.This study can provide data support and validation for hydrological model simulation and prediction,as well as water resource assessment,in the upper Yellow River Basin,especially for the headwater area.The results also provide case support for permafrost hydrology modeling in ungauged or poorly gauged watersheds in the High Mountain Asia.

Water budgetRunoffFreeze-thaw processesActive layerPermafrost basinAlpine wetland

Qing-Feng WANG、Hui-Jun JIN、Dong-Liang LUO、Yu SHENG、Jun WEN、Chien-Lu PING、Mark H.CLARK、Qiang MA、Xiao-Ying JIN、Ji-Chun WU、Yu-Zhong YANG、Qiang LI、Raul D.ŞERBAN、Daqing YANG、Victor F.BENSE、Qing-Bai WU

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Key Laboratory of Cryospheric Science and Frozen Soil Engineering,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China

Qinghai-Beiluhe Plateau Frozen Soil Engineering Safety National Observation and Research Station,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China

School of Civil Engineering and Transportation,China-Russia Joint Laboratory of Cold Regions Engineering and Environment,and Permafrost Institute,Northeast Forestry University,Harbin 150040 China

College of Atmospheric Science,Plateau Atmosphere and Environment Key Laboratory of Sichuan Province,Chengdu University of Information Technology,Chengdu 610225,China

Agricultural and Forestry Experiment Station,University of Alaska Fairbanks,Palmer Research Center Palmer 99645,USA

USDA-Natural Resources Conservation Service,Palmer 99645,USA

College of Water Conservancy and Hydropower Engineering,Gansu Agricultural University,Lanzhou 730070,China

Institute for Alpine Environment,Eurac Research,Bolzano 39100,Italy

Faculty of Agricultural,Environmental and Food Sciences,Free University of Bozen-Bolzano,Bolzano 39100,Italy

Watershed Hydrology and Ecology Division,Environment and Climate Change Canada,Victoria V8S 3V3,Canada

Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China

Hydrology and Quantitative Water Management Group,Department of Environmental Sciences,Wageningen University,Wageningen 6700,The Netherlands

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2024

10.1016/j.accre.2024.09.005

气候变化研究进展(英文版)
国家气候中心

气候变化研究进展(英文版)

影响因子：0.806
ISSN：1674-9278
年,卷(期)：2024.15(5)