Insights into the influence of morphology on the hydrological processes of river catchments using stable isotopes

IF 2.8 3区环境科学与生态学 Q2 WATER RESOURCES

Hydrological Sciences Journal-Journal Des Sciences Hydrologiques Pub Date : 2023-06-28 DOI:10.1080/02626667.2023.2224005

I. Matiatos, A. Papadopoulos, Y. Panagopoulos, E. Dimitriou

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Abstract

ABSTRACT Water isotopes (δ18O, δ2H) were systematically monitored in two river catchments to investigate the isotopic spatiotemporal variation and the differences between them. The Pinios River Basin (PRB) exhibited lower average δ 18O and δ 2H values (−7.9‰ and −50.8‰, respectively) compared to the Evrotas River Basin (ERB) (−6.5‰ and −38.2‰, respectively) but higher in range (3.3‰ vs 1.2‰ for δ18O, respectively). The Bayesian modelling results showed higher groundwater contribution in the PRB (25–50%) than in the ERB (15–35%) relative to precipitation during the wet period. The isotopic spatial variability was attributed to the influence of local precipitation, evaporation and additional flow pathways (e.g. soil water). The correlation analysis showed that the isotopic composition is controlled by the catchment altitude, slope and discharge. This study highlights the catchment physiographic control on the isotopic composition of rivers, which can support strategies for better water resources management.

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利用稳定同位素研究形态对河流流域水文过程的影响

摘要系统监测了两个流域的水同位素(δ18O、δ2H)，探讨了它们的时空变化及其差异。Pinios河(PRB) δ18O和δ 2H的平均值分别为- 7.9‰和- 50.8‰，低于Evrotas河(ERB)(分别为- 6.5‰和- 38.2‰)，但δ18O的平均值高于Evrotas河(ERB)(分别为3.3‰和1.2‰)。贝叶斯模拟结果表明，相对于湿期降水，PRB的地下水贡献(25-50%)高于ERB(15-35%)。同位素空间变异归因于当地降水、蒸发和其他流动途径(如土壤水)的影响。相关分析表明，同位素组成受流域海拔、坡度和流量的控制。本研究强调了流域地理对河流同位素组成的控制，这可以为更好的水资源管理策略提供支持。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Hydrological Sciences Journal-Journal Des Sciences Hydrologiques 环境科学-水资源

CiteScore

6.60

自引率

11.40%

发文量

144

审稿时长

9.8 months

期刊介绍： Hydrological Sciences Journal is an international journal focused on hydrology and the relationship of water to atmospheric processes and climate. Hydrological Sciences Journal is the official journal of the International Association of Hydrological Sciences (IAHS). Hydrological Sciences Journal aims to provide a forum for original papers and for the exchange of information and views on significant developments in hydrology worldwide on subjects including: Hydrological cycle and processes Surface water Groundwater Water resource systems and management Geographical factors Earth and atmospheric processes Hydrological extremes and their impact Hydrological Sciences Journal offers a variety of formats for paper submission, including original articles, scientific notes, discussions, and rapid communications.