干旱区研究 ›› 2021, Vol. 38 ›› Issue (1): 59-67.doi: 10.13866/j.azr.2021.01.07

• 水资源及其利用 • 上一篇    下一篇

基于昼夜水位波动法估算地下水蒸散发量的研究——以河西走廊典型绿洲为例

王京晶1,2,3,4(),刘鹄3,4(),徐宗学1,2,王思佳3,4   

  1. 1.北京师范大学水科学研究院,北京 100875
    2.城市水循环与海绵城市技术北京市重点实验室,北京 100875
    3.中国科学院西北生态环境资源研究院,中国生态系统研究网络临泽内陆河流域研究站,甘肃 兰州 730000
    4.中国科学院内陆河流域生态水文重点实验室,甘肃 兰州 730000
  • 收稿日期:2020-05-12 修回日期:2020-08-19 出版日期:2021-01-15 发布日期:2021-03-05
  • 通讯作者: 刘鹄
  • 作者简介:王京晶(1997-),男,硕士研究生,主要从事干旱区生态水文学研究. E-mail: wangjingjing@mail.bnu.edu.cn
  • 基金资助:
    国家自然科学基金重点项目(41630861)

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

WANG Jingjing1,2,3,4(),LIU Hu3,4(),XU Zongxue1,2,WANG Sijia3,4   

  1. 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:2020-05-12 Revised:2020-08-19 Online:2021-01-15 Published:2021-03-05
  • Contact: Hu LIU

摘要:

使用多种昼夜水位波动法(White法、Hays法、Loheide法),计算了黑河中游荒漠绿洲过渡带地下水浅埋区生长季典型时段地下水蒸散发(ETg),并将估算结果同彭曼方法获得的潜在蒸散发(PET)、E-601测量的水面蒸发(ET0)和Φ20测量的水面蒸发(ET1)进行相关性分析。结果表明:在几种算法中,Hays法精度最高,其次是White法,Loheide法计算精度最低。因此,在计算逐日ETg时可优先使用Hays方法,并推荐使用ET0来检验计算精度。用Loheide法计算ETg可获得较高的精度(R=0.821,P<0.01),但具有明显时滞效应,滞后时间约为3 h。这些计算成果对当地水资源的合理配置与可持续开发利用具有一定的参考意义和应用价值。

关键词: 荒漠绿洲, 地下水, 昼夜水位波动法, 地下水补给

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