干旱区研究 ›› 2025, Vol. 42 ›› Issue (7): 1211-1221.doi: 10.13866/j.azr.2025.07.05 cstr: 32277.14.AZR.20250705

• 水土资源 • 上一篇    下一篇

阿克苏河流域蒸散量时空变化规律与驱动因素

杨琛1,2,3(), 马斌4,5,6, 何学敏1,2,3(), 郝哲4,5,6, 马玉4,5,6   

  1. 1.新疆大学生态与环境学院,新疆 乌鲁木齐 830017
    2.新疆大学绿洲生态教育部重点实验室,新疆 乌鲁木齐 830017
    3.新疆精河温带荒漠生态系统教育部野外科学观测研究站,新疆 精河 833300
    4.中国地质调查局乌鲁木齐自然资源综合调查中心,新疆 乌鲁木齐 830057
    5.塔里木河源区绿洲水土过程与生态安全野外科学观测研究站,新疆 乌鲁木齐 830000
    6.塔里木河下游水资源与生态野外科学观测研究站,新疆 乌鲁木齐 830057
  • 收稿日期:2024-12-02 修回日期:2025-03-26 出版日期:2025-07-15 发布日期:2025-07-07
  • 通讯作者: 何学敏. E-mail: hxm@xju.edu.cn
  • 作者简介:杨琛(2000-),男,硕士研究生,主要从事生态遥感研究. E-mail: yangchen1517@stu.xju.edu.cn
  • 基金资助:
    工程技术创新平台建设运行项目(WZD-XM-KJ-2023-0125);中国地质调查局项目(DD20220887);自然资源部自然资源要素耦合过程与效应重点实验室开放课题(2022KFKTC010);自治区高校基本科研业务费项目(XJEDU2022J001)

Patterns of spatial and temporal variation of evapotranspiration in Aksu River Basin and factors driving them

YANG Chen1,2,3(), MA Bin4,5,6, HE Xuemin1,2,3(), HAO Zhe4,5,6, MA Yu4,5,6   

  1. 1. College of Ecology and Environment, Xinjiang University, Urumqi 830017, Xinjiang, China
    2. Key Laboratory of Oasis Ecology of Education Ministry, Xinjiang University, Urumqi 830017, Xinjiang, China
    3. Xinjiang Jinghe Observation and Research Station of Temperate Desert Ecosystem, Ministry of Education, Jinghe 833300, Xinjiang, China
    4. Urumqi Comprehensive Survey Center on Natural Resources, Urumqi 830057, Xinjiang, China
    5. Observation and Research Station of Soil and Water Processes and Ecologica Security of Oasis in the Headstream Area of the Tarim River, Urumqi 830000, Xinjiang, China
    6. Field Observation and Research Station of Water Resources and Ecological Effect in Lower Reaches of Tarim River Basin, Urumqi 830057, Xinjiang, China
  • Received:2024-12-02 Revised:2025-03-26 Published:2025-07-15 Online:2025-07-07

摘要: 蒸散作为水循环的关键环节,对水资源调控和生态保护至关重要,尤其在干旱区水资源消耗和再分配中起着重要作用。本文以阿克苏河流域为研究区域,利用2001—2022年MOD16蒸散量产品数据,系统分析了实际蒸散量(AET)与潜在蒸散量(PET)的时空变化规律,并探讨了其影响因素,为区域水资源管理和生态环境保护提供了科学依据。结果表明:(1) MOD16产品数据与ET0数据较为一致(R2=0.8133),产品精度满足阿克苏河流域蒸散量时空分布研究要求。(2) 多年平均AETPET分别为168.36 mm和1569.03 mm,AET总体呈现上升趋势,PET呈下降趋势。AETPET在空间分布上差异明显且变化趋势相反。(3) 近22 a来,阿克苏河流域AET显著增长且主要集中在耕地、林地及绿洲,而PET整体减少但在绿洲边缘及河道附近增加,AET稳定性差而PET相对稳定,两者Hurst指数均显示未来趋势可能发生变化,其中AET有56%区域具有反持续性,PET有89%区域具有反持续性。(4) AETPET变化与气候因子变化具有内在联系,其中风速和相对湿度是影响区域AETPET变化的主要驱动因素。该研究可为干旱区水资源管理与科学利用提供重要参考。

关键词: 蒸散量, 水循环, 时空变化, 水资源管理, 阿克苏河流域

Abstract:

Evapotranspiration, as a crucial component of the water cycle, is vital for regulating water resources and protecting the environment, especially in arid regions where it plays a significant role in water consumption and redistribution. This study focused on Aksu River Basin and used MOD16 evapotranspiration product data from 2001 to 2022 to systematically analyze the patterns of spatial and temporal variation of actual evapotranspiration (AET ) and potential evapotranspiration (PET ), along with an exploration of the factors influencing them. The findings provide a scientific basis for managing regional water resources and protecting the environment. The results indicate the following: (1) The MOD16 product data are consistent with ET0 data (R2=0.8133), and the product accuracy meets the requirements for studying the spatial and temporal distribution of evapotranspiration in Aksu River Basin. (2) The multi-year average AET and PET are 168.36 mm and 1569.03 mm, respectively. AET shows an overall increasing trend, while PET exhibits a decreasing one. There are significant differences in the spatial distribution of AET and PET, with the opposite trends being exhibited. (3) Over the last 22 years, AET in Aksu River Basin has significantly increased, mainly in cultivated land, forestland, and oases, while PET has decreased overall but increased near the edges of oases and along river channels. AET is less stable than PET, and the Hurst indices of both indicate that the trends may change in future, with 56% of the area showing anti-persistence for AET and 89% for PET. (4) Changes in AET and PET are intrinsically linked to changes in climatic factors, with wind speed and relative humidity being the main factors influencing regional variations in these two variables. This study provides an important scientific reference for managing and using water resources in arid regions.

Key words: evapotranspiration, water cycle, spatial and temporal variation, water resource management, Aksu River Basin