Streamflow–concentration relationships of surface water in the Choapa basin: historical analysis and projections under climate change

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 : 2023-05-16 DOI:10.1080/02626667.2023.2212167

Vanessa Hernandez, J. Arumí, J. Boll, Denisse J. Duhalde, S. MacDonell, R. Oyarzún

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Abstract

ABSTRACT The use of concentration–streamflow (C–Q) relationships is presented as a novel approach for studying climate change effects on water quality. Based on data from nine monitoring stations in the Choapa basin, north-central Chile, constituent behaviours were classified as constancy, enrichment or dilution. Constancy was shown for B, As, and Cu. Dilution and enrichment relationships were observed at some sites. Electrical conductivity and major ions showed dilution behaviour, with Na+, Mg2+, Cl−, SO4 −2 and K+ showing greater variability in response to streamflow changes. Fe, Al, Mn and Zn presented enrichment behaviour, with Al and Fe showing greater variability. Based on historical C-Q relationships and available projections of streamflow variations under climate change, the change in constituent concentrations from 2010 to 2040 likely will not exceed ±10% with respect to the historical average, and ±15% from 2040 to 2070. In particular, Fe and Mn require special attention in the future.

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Choapa盆地地表水径流-浓度关系：气候变化下的历史分析和预测

摘要浓度-流量（C–Q）关系是研究气候变化对水质影响的一种新方法。根据智利中北部Choapa盆地九个监测站的数据，成分行为被归类为恒定性、富集性或稀释性。B、As和Cu表现出恒定性。在一些位置观察到稀释和富集关系。电导率和主要离子表现出稀释行为，Na+、Mg2+、Cl−、SO4−2和K+对流量变化的响应表现出更大的可变性。Fe、Al、Mn和Zn表现出富集行为，其中Al和Fe表现出更大的可变性。根据历史C-Q关系和气候变化下流量变化的可用预测，2010年至2040年成分浓度的变化可能不会超过历史平均值的±10%，2040年至2070年可能不会超过±15%。特别是Fe和Mn在未来需要特别关注。

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.

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