Climate Change Contributions to Water Conservation Capacity in the Upper Mekong River Basin

IF 3 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Water Pub Date : 2024-09-13 DOI:10.3390/w16182601

Yuanyuan Luo, Zhaodan Cao, Xiaoer Zhao, Chengqiu Wu

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Abstract

Investigations into the impacts of climate change on water conservation capacity in the upper Mekong River Basin (UMRB) are important for the region’s sustainability. However, quantitative studies on isolating the individual contribution of climate change to water conservation capacity are lacking. In this study, various data-driven SWAT models were developed to quantitatively analyze the unique impact of climate change on water conservation capacity in the UMRB. The results reveal the following: (1) From 1981 to 2020, the annual water conservation capacity ranged from 191.6 to 392.9 mm, showing significant seasonal differences with the values in the rainy season (218.6–420.3 mm) significantly higher than that in the dry season (−57.0–53.2 mm). (2) The contribution of climate change to water conservation capacity is generally negative, with the highest contribution (−65.2%) in the dry season, followed by the annual (−8.7%) and the rainy season (−8.1%). (3) Precipitation, followed by evaporation and surface runoff, emerged as the critical factor affecting water conservation capacity changes in the UMRB. This study can provide insights for water resources management and climate change adaptations in the UMRB and other similar regions in the world.

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气候变化对湄公河上游流域水资源保护能力的影响

调查气候变化对湄公河上游流域（UMRB）水资源保护能力的影响对该地区的可持续发展非常重要。然而，目前还缺乏关于气候变化对水资源保护能力的单独影响的定量研究。本研究开发了多种数据驱动的 SWAT 模型，以定量分析气候变化对湄公河流域水资源保护能力的独特影响。结果如下(1）从 1981 年到 2020 年，年节水能力在 191.6 到 392.9 毫米之间，呈现明显的季节性差异，雨季节水能力（218.6-420.3 毫米）明显高于旱季节水能力（-57.0-53.2 毫米）。(2) 气候变化对节水能力的影响一般为负，旱季影响最大（-65.2%），其次是全年（-8.7%）和雨季（-8.1%）。(3) 降水是影响乌马河流域节水能力变化的关键因素，其次是蒸发和地表径流。本研究可为乌姆兰盆地及世界其他类似地区的水资源管理和气候变化适应提供启示。

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来源期刊

Water WATER RESOURCES-

CiteScore

5.80

自引率

14.70%

发文量

3491

审稿时长

19.85 days

期刊介绍： Water (ISSN 2073-4441) is an international and cross-disciplinary scholarly journal covering all aspects of water including water science and technology, and the hydrology, ecology and management of water resources. It publishes regular research papers, critical reviews and short communications, and there is no restriction on the length of the papers. Our aim is to encourage scientists to publish their experimental and theoretical research in as much detail as possible. Full experimental and/or methodical details must be provided for research articles. Computed data or files regarding the full details of the experimental procedure, if unable to be published in a normal way, can be deposited as supplementary material.