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Headwater Flow Geochemistry of Mount Everest (Upper Dudh Koshi River, Nepal)
Frontiers in Earth Science ( IF 2.9 ) Pub Date : 2020-07-28 , DOI: 10.3389/feart.2020.00351
Pierre Chevallier , Jean-Luc Seidel , Jean-Denis Taupin , Ornella Puschiasis

The aim of this work, conducted in the upper valley of the Khumbu on the southern part of Mount Everest, is to approach in parallel three topics: (i) the dynamics of the water geochemistry, major ions and trace elements; (ii) the stable water isotopes of precipitation and rivers; and (iii) the water uses by the inhabitants. As in most mountain environments, the Khumbu area is threatened by climate change, which impacts the cryosphere and consequently the people and the landscapes. Moreover, changes in water use are also related to new needs stemming from tourism, which strongly affect local livelihood. For the first two topics, new results are presented. They provide details on the global chemical quality of the river water and show how certain elements are seasonally influenced and how other elements allow us to distinguish the water origins within the study zone. Beside the use of stable isotopes to determine mainly the origin of the water flow in the rivers, the isotopic patterns confirm the double climatic influence of the westerly fluxes in the winter season and of the Asian monsoon in the summer season. Regarding water use, the study does not conclude on the potability of the water resource, because microbiologic and organic components have not been investigated; however it confirms that the chemical quality is good. In conclusion, we attempt to predict the future of the geochemistry patterns submitted to the double pressure of climate change and the surge in tourism.



中文翻译:

珠穆朗玛峰的上游水流地球化学(尼泊尔尼泊尔达德古德河上游)

这项工作的目的是在珠穆朗玛峰南部的昆布河上游山谷进行,同时探讨三个主题:(i)水地球化学,主要离子和微量元素的动力学;(ii)降水和河流的稳定水同位素;(iii)居民用水。与大多数山区环境一样,昆布地区也受到气候变化的威胁,气候变化影响了冰冻圈,进而影响了人们和景观。此外,用水的变化还与旅游业带来的新需求有关,这极大地影响了当地的生计。对于前两个主题,提出了新的结果。它们提供了有关河流水的全球化学质量的详细信息,并显示了某些元素如何受到季节影响以及其他元素如何使我们能够区分研究区域内的水源。除了使用稳定同位素主要确定河流水流的来源外,同位素模式还证实了冬季的西风通量和夏季的亚洲季风对气候的双重影响。关于水的使用,该研究并未就水资源的可饮用性得出结论,因为尚未研究微生物和有机成分。但是,它确认化学质量良好。总之,我们试图预测遭受气候变化和旅游业激增的双重压力的地球化学模式的未来。除了使用稳定同位素主要确定河流水流的来源外,同位素模式还证实了冬季的西风通量和夏季的亚洲季风对气候的双重影响。关于水的使用,该研究并未就水资源的可饮用性得出结论,因为尚未研究微生物和有机成分。但是,它确认化学质量良好。总之,我们试图预测遭受气候变化和旅游业激增的双重压力的地球化学模式的未来。除了使用稳定同位素主要确定河流水流的来源外,同位素模式还证实了冬季的西风通量和夏季的亚洲季风对气候的双重影响。关于水的使用,该研究并未就水资源的可饮用性得出结论,因为尚未研究微生物和有机成分。但是,它确认化学质量良好。总之,我们试图预测遭受气候变化和旅游业激增的双重压力的地球化学模式的未来。同位素模式证实了冬季的西风通量和夏季的亚洲季风对气候的双重影响。关于水的使用,该研究并未就水资源的可饮用性得出结论,因为尚未研究微生物和有机成分。但是,它确认化学质量良好。总之,我们试图预测遭受气候变化和旅游业激增双重压力的地球化学模式的未来。同位素模式证实了冬季的西风通量和夏季的亚洲季风对气候的双重影响。关于水的使用,该研究并未就水资源的可饮用性得出结论,因为尚未研究微生物和有机成分。但是,它确认化学质量良好。总之,我们试图预测受气候变化和旅游业激增双重压力影响的地球化学模式的未来。

更新日期:2020-09-05
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