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中国沙漠 ›› 2022, Vol. 42 ›› Issue (6): 243-254.DOI: 10.7522/j.issn.1000-694X.2022.00063

• • 上一篇    

以地下水位估算的荒漠河岸胡杨( Populus euphratica )林生态系统地下水蒸散发

张琦1,2(), 苏永红1(), 冯起1, 鱼腾飞1, 马小红3   

  1. 1.中国科学院西北生态环境资源研究院 内陆河流域生态水文重点实验室,甘肃 兰州 730000
    2.中国科学院大学,北京 100049
    3.太原师范学院 汾河流域科学发展研究中心,山西 晋中 030619
  • 收稿日期:2021-12-27 修回日期:2022-04-12 出版日期:2022-11-20 发布日期:2023-01-09
  • 通讯作者: 苏永红
  • 作者简介:苏永红(E-mail: syh@lzb.ac.cn
    张琦(1999—),女,山东德州人,硕士研究生,主要研究方向为西北干旱区蒸散发。E-mail: zhangqi21@nieer.ac.cn
  • 基金资助:
    国家自然科学基金项目(42071138);甘肃省自然科学基金项目(21JR7RA054);阿拉善盟科技计划项目(AMYY2021-08)

Estimation of groundwater evapotranspiration of Populus euphratica forest ecosystem along desert river banks based on groundwater level dynamics

Qi Zhang1,2(), Yonghong Su1(), Qi Feng1, Tengfei Yu1, Xiaohong Ma3   

  1. 1.Key Laboratory of Ecohydrology of Inland River Basin,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    2.University of Chinese Academy of Sciences,Beijing 100049,China
    3.Research Center for Scientific Development in Fenhe River Valley,Taiyuan Normal University,Jinzhong 030619,Shanxi,China
  • Received:2021-12-27 Revised:2022-04-12 Online:2022-11-20 Published:2023-01-09
  • Contact: Yonghong Su

摘要:

基于2014年和2020年地下水位监测数据,估算了黑河下游额济纳绿洲七道桥胡杨(Populus euphratica)林生态系统生长季旺盛期的地下水蒸散发(ETg),并与从涡度观测系统测定的蒸散发(ET)作比较,同时分析了不同模型的估算结果及其主要影响因素。结果表明:(1)基于昼夜水位波动法(White、Hays和Soylu方法)估算的ETg均与生态系统ET变化趋势一致且显著相关,经过对比分析得出,Hays方法精度最高,推荐使用该方法计算ETg。(2)地下水位、太阳辐射、气温和饱和水汽压差是影响ETg的主要因子,风速对ETg无显著影响。(3)生长季,ETg占生态系统ET的比例随干旱时间的增大而增大。

关键词: 荒漠胡杨(Populus euphratica)林, 生态系统蒸散发, 昼夜水位波动法, 地下水蒸散发

Abstract:

Based on the dynamic monitoring data of groundwater level in 2014 and 2020, the groundwater evapotranspiration (ETg) of desert riparian Populus euphratica forest ecosystem in Qidaoqiao oasis in the lower reaches of Heihe River was estimated and compared with the evapotranspiration (ET) measured by eddy covariance data. The estimation results of different estimation models and their main influencing factors were analyzed. The results showed that: (1) The variation trend of ETg estimated by the three algorithms (White, Hays and Soylu methods) were consistent with and significantly correlated with the ecosystem ET. Hays method had the highest accuracy, so this method was recommended to calculate ETg. (2) Groundwater level, solar radiation, temperature and vapor pressure were the main factors affecting ETg, but the wind speed has no significant effect on ETg. (3) In the growing season, the proportion of ETg to surface ET increases with the increase of drought time.

Key words: desert Populus euphratica forest, ecosystem evapotranspiration, diurnal water level fluctuation method, groundwater evapotranspiration

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