首页|A distributed modeling approach to water balance implications from changing land cover dynamics in permafrost environments

A distributed modeling approach to water balance implications from changing land cover dynamics in permafrost environments

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There is 78％permafrost and seasonal frozen soil in the Yangtze River's Source Region(SRYR),which is situated in the middle of the Qinghai-Xizang Plateau.Three distinct scenarios were developed in the Soil and Water Assessment Tool(SWAT)to model the effects of land cover change(LCC)on various water balance components.Discharge and percolation of groundwater have decreased by mid-December.This demonstrates the seasonal contributions of subsurface water,which diminish when soil freezes.During winter,when surface water inputs are low,groundwater storage becomes even more critical to ensure water supply due to this periodic trend.An impermeable layer underneath the active layer thickness decreases GWQ and PERC in LCC+permafrost scenario.The water transport and storage phase reached a critical point in August when precipitation,permafrost thawing,and snowmelt caused LATQ to surge.To prevent waterlogging and save water for dry periods,it is necessary to control this peak flow phase.Hydrological processes,permafrost dynamics,and land cover changes in the SRYR are difficult,according to the data.These interactions enhance water circulation throughout the year,recharge of groundwater supplies,surface runoff,and lateral flow.For the region's water resource management to be effective in sustaining ecohydrology,ensuring appropriate water storage,and alleviating freshwater scarcity,these dynamics must be considered.

Cold regionLand cover changePermafrost hydrologySWAT modelSource regionYangtze river

Naveed Ahmed、Haishen Lu、Zhongbo Yu、Oluwafemi E.Adeyeri、Muhammad Shahid Iqbal、Jinbin Su

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The National Key Laboratory of Water Disaster Prevention,College of Hydrology and Water Resources,Hohai University,Nanjing 210098,China

College of Hydrology and Water Resources,Hohai University,Nanjing 210098,China

School of Energy and Environment,City University of Hong Kong,Kowloon,Hong Kong Special Administrative Regions of China

Australian Rivers Institute,Griffith University,Nathan,QLD 4111,Australia

International Water Management Institute(IWMI),Lahore 54000,Pakistan

National Tibetan Plateau Data Center,State Key Laboratory of Tibetan Plateau Earth System,Environment and Resources(TPESER),Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China

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2024

10.1016/j.geosus.2024.06.004

地理学与可持续性(英文)

地理学与可持续性(英文)

ISSN：
年,卷(期)：2024.5(4)