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干旱区地理 ›› 2024, Vol. 47 ›› Issue (8): 1292-1303.doi: 10.12118/j.issn.1000-6060.2024.094

• 第三次新疆综合科学考察 • 上一篇    下一篇

昆仑山北坡陆地水储量变化及其驱动因素分析

夏婷婷1(), 薛璇2, 王灏伟2, 徐文哲2, 盛紫怡2, 汪洋1()   

  1. 1.新疆农业大学草业学院,新疆 乌鲁木齐 830052
    2.新疆农业大学资源与环境学院,新疆 乌鲁木齐 830052
  • 收稿日期:2024-02-17 修回日期:2024-03-31 出版日期:2024-08-25 发布日期:2024-09-02
  • 通讯作者: 汪洋(1987-),男,副教授,主要从事干旱区草地生态等方面研究. E-mail: wangyang@xjau.edu.cn
  • 作者简介:夏婷婷(1994-),女,博士研究生在读,主要从事干旱区草地生态与水资源等方面研究. E-mail: 320220036@xjau.edu.cn
  • 基金资助:
    第三次新疆综合科学考察项目(2021xjkk010202)

Changes in terrestrial water storage and its drivers on the north slope of Kunlun Mountains

XIA Tingting1(), XUE Xuan2, WANG Haowei2, XU Wenzhe2, SHENG Ziyi2, WANG Yang1()   

  1. 1. College of Grassland Science, Xinjiang Agricultural University, Urumqi 830052, Xinjiang, China
    2. College of Resources and Environment, Xinjiang Agricultural University, Urumqi 830052, Xinjiang, China
  • Received:2024-02-17 Revised:2024-03-31 Published:2024-08-25 Online:2024-09-02

摘要:

陆地水储量变化及其驱动机制研究可为区域水资源禀赋和潜力评价提供重要依据,并可为水资源调控与管理保护相关决策提供科学支撑。基于GRACE数据、气象数据、实际蒸散发与人类活动等多源数据对1990—2020年昆仑山北坡陆地水储量动态变化进行分析,定量评估了不同影响因子对昆仑山北坡陆地水储量长期变化的影响。结果表明:(1) 昆仑山北坡陆地水储量变化与分异显著,整体以0.123 cm·a-1的速率呈现增长变化,其中,库木库里盆地、克里雅河流域、车尔臣河流域、和田河流域均呈现增加趋势,叶尔羌河流域陆地水储量呈现不同程度的亏损状态。陆地水储量变化呈增加趋势的面积占区域总面积的79.63%,其中,库木库里盆地陆地水储量变化增加趋势最为显著。昆仑山北坡陆地水储量整体在2005—2006年增加速度最快,变化量为2.253 cm。(2) 1990—2020年气温、降水量与蒸散发均呈现波动性上升趋势,年均降水量变化显著,空间分布具有异质性。30 a间陆地水储量与年均气温、年均降水量、实际蒸散发呈现不同程度的相关关系,呈现正相关区域分别占比为40.78%、54.19%、44.74%。(3) 气象因素中气温和降水量是主导陆地水储量变化的主要因素,双因子交互中气温∩人口密度(0.823)的解释力最强,气象因素中气温∩降水量(0.713)解释力最强,且双因子之间的交互作用明显强于单因子。

关键词: 陆地水储量, GRACE, 气候变化, 人类活动, 昆仑山北坡

Abstract:

Terrestrial water storage are crucial in the hydrological cycle. Analyzing the dynamics of these reserves and their main driving mechanisms provides a scientific basis for the macro-control, management, and protection of water resources. This study examines the dynamic changes in terrestrial water storage on the north slope of the Kunlun Mountains from 1990 to 2020, utilizing multi-source data including GRACE data, meteorological data, actual evapotranspiration, and human activities. It quantitatively evaluates the influence of various factors on the long-term changes in water storage in this region. The results indicate significant variation and differentiation in water reserves across the area. Notably, 79.63% of the area showed an increasing trend. Water reserves in the Yarkant River Basin exhibited deficits, while those in the Kumukuli Basin displayed significant surpluses. The overall increase in water reserves on the north slope was 0.123 cm·a-1, with the peak rate occurring in 2005—2006, marking a change of 2.253 cm. The Kumukuli Basin, along with the Keriya River Basin, Qarqan River Basin, and Hotan River Basin, all demonstrated increasing trends, especially notable in the Kumukuli Basin. Both temperature, precipitation and evapotranspiration showed fluctuating upward trends from 1990 to 2020, with average annual precipitation varying significantly and exhibiting spatial heterogeneity. The correlation between terrestrial water storage and average annual temperature, precipitation, and actual evapotranspiration over the 30-year period showed varying degrees of correlation, with positive correlation areas accounting for 40.78%, 54.19%, and 44.74%, respectively. Among meteorological factors, temperature and precipitation were the primary drivers of changes in terrestrial water storage. The strongest explanatory power was observed in the interaction between temperature and population density (0.823), and between temperature and precipitation (0.713) among meteorological factors, indicating that their combined impact significantly exceeds that of any single factor.

Key words: terrestrial water storage, GRACE, climate change, human activities, north slope of Kunlun Mountains