干旱区研究

Arid Zone Research >

2021 , Vol. 38 >Issue 1: 59 - 67

DOI: https://doi.org/10.13866/j.azr.2021.01.07

Water Resources and Utilization

Estimation of groundwater evapotranspiration with measured diurnal groundwater variations: A case study of typical oasis in Hexi Corridor

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  • 1. College of Water Sciences, Beijing Normal University, Beijing 100875, China
    2. Beijing Key Laboratory of Urban Hydrological Cycle and Sponge City Technology, Beijing 100875, China
    3. Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Linze Inland River Basin Research Station, Chinese Ecosystem Research Network, Lanzhou 730000, Gansu, China
    4. Key Laboratory of Ecohydrology of Inland River Basin, Lanzhou 730000, Gansu, China

Received date: 2020-05-12

  Revised date: 2020-08-19

  Online published: 2021-03-05

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Abstract

Daily groundwater evapotranspiration (ETg) was estimated for the shallow groundwater area of the new oasis in the middle reaches of the Heihe River basin using diurnal water level fluctuation methods （White, Hays, Loheide）. The results were compared with the potential evapotranspiration (PET) estimated using Penman method, water surface evaporation (ET0) measured using E-601 pan, and water surface evaporation (ET1) measured using Φ20, and the differences between ETg and PET (ET0 and ET1) were analyzed using Pearson correlation coefficient. The results showed that among these calculation methods, Hays method performed the best with the highest accuracy, followed by the White method, and the Loheide method performed the worst with the lowest accuracy. Therefore, Hays method is recommended for estimation of daily ETg and ET0 is recommended for testing the estimation accuracy. Loheide method showed high ETg accuracy (R=0.821, P<0.01) with approximate 3 hr time lag, which was also found in other areas of the Heihe River basin (old oasis, desert edge, shelterbelt). The results obtained in this study will be helpful and may offer scientific support for rational allocation, sustainable development, and utilization of regional water resources in the Heihe River basin.

Key words： desert oasis; groundwater level; diurnal groundwater variation; groundwater recharge

Cite this article

WANG Jingjing,LIU Hu,XU Zongxue,WANG Sijia . Estimation of groundwater evapotranspiration with measured diurnal groundwater variations: A case study of typical oasis in Hexi Corridor[J]. Arid Zone Research, 2021 , 38(1) : 59 -67 . DOI: 10.13866/j.azr.2021.01.07

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