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Plateau river research: spatial-temporal variations of δ18O and δd in the water of the Yarlung Tsangpo River and their controlling factors.

Abstract：

:Stable isotope technology has been widely used to trace sources and evolution of water bodies, relationships between different water bodies and pollution sources. Based on δ18O and δD data from the Yarlung Tsangpo River in 2017, this paper analyzes the composition characteristics of δ18O and δD in the river water during the low-flow, high-flow and normal-flow seasons of the entire Yarlung Tsangpo River and further reveals the spatial evolution and influencing factors. The results show that the values of δ18O, δD and d-excess were different in time and space. The δ18O, δD and d-excess values of the Yarlung Tsangpo River in the low-flow season were significantly higher than in the high-flow season. This was mainly due to weak evaporation enrichment and precipitation supply effects on the river water during the wet season. From the perspective of season change, the d-excess in the low-season is significantly higher than in the high-flow season and the normal-flow season; from the perspective of spatial change, the d-excess shows the same spatial variation trend as the δ18O, which first decreases and then increases. Based on the investigation of δ18O and δD in the main and Branch rivers of the Yarlung Tsangpo River Basin, it was found that the upper reaches of the basin were mainly supplied by snowmelt, the lower reaches were mainly supplied by rainfall.

journal_name

Ecotoxicol Environ Saf

journal_title

Ecotoxicology and environmental safety

authors

Li Z,Liu J,Zhao Y,Zhang Y,Hu Q,Liu Y,Guo H

doi

10.1016/j.ecoenv.2020.111678

subject

Has Abstract

pub_date

2021-01-15 00:00:00

pages

111678

eissn

0147-6513

issn

1090-2414

pii

S0147-6513(20)31515-3

journal_volume

208

pub_type

杂志文章

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