首页|Effects of canopy resistance parameterization on evapotranspiration partitioning and soil water contents in a maize field under a semiarid climate

Effects of canopy resistance parameterization on evapotranspiration partitioning and soil water contents in a maize field under a semiarid climate

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Different canopy resistance(rc)parameterization has been used in land surface models to simulate actual evapotranspiration(ETc)and soil hydraulic variable for crop fields.However,the influence of rc parameterization on evapotranspiration(ET)partitioning and soil water dynamics has not been fully investigated with consideration of the coupled soil water and vapor physics.This study investigated the influential mechanisms of five rc methods(viz.,Jarvis,Katerji-Perrier,Massman,Kelliher-Leuning,and Farias)on ET partitioning and soil water contents in an irrigated maize field under a semiarid climate through a soil water and vapor transfer model.The Jarvis method presented the best ET results(R2=0.86 and RMSE=0.71 mm·d-1).Different rc parameterization mainly altered the simulated amount of soil water contents,while not changed the response of soil water dynamics to irrigation events.By the integrated analysis of the ET partitioning and root-zone water budget,different rc methods varied in the choice of the optimum irrigation water use strategies.This study identified the direct and indirect impacts of rc on the ET partitioning and emphasizes the necessity of both the ET partitioning and water supply sources in the decision-making for irrigation water management in semiarid regions.

Field experimentSTEMMUS-ET modelroot-zone water budgetNorthwest China

Lianyu YU、Huanjie CAI、Delan ZHU、Yuhan LIU、Fubin SUN、Xiangxiang JI、Yijian ZENG、Zhongbo SU、La ZHUO

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College of Water Resources and Architectural Engineering,Northwest A&F University,Yangling 712100,China

Key Laboratory of Agricultural Soil and Water Engineering in Arid Area of Ministry of Education,Northwest A&F University,Yangling 712100,China

Faculty of Geo-Information Science and Earth Observation,University of Twente,Enschede 7522 NH,the Netherlands

College of Soil and Water Conservation Science and Engineering,Northwest A&F University,Yangling 712100,China

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2024

10.15302/J-FASE-2024581

农业科学与工程前沿(英文版)

农业科学与工程前沿(英文版)

ISSN：
年,卷(期)：2024.11(4)