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

Streamflow–concentration relationships of surface water in the Choapa basin: historical analysis and projections under climate change
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乔帕盆地地表水的径流与浓度关系:气候变化下的历史分析和预测

DOI:
10.1080/02626667.2023.2212167
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发表时间:
2023
影响因子:
3.5
通讯作者:
Oyarzún, Ricardo
Oyarzún, Ricardo
中科院分区:
环境科学与生态学3区
文献类型:
--
作者:
Hernandez, Vanessa;Arumí, José Luis;Boll, Jan;Duhalde, Denisse;MacDonell, Shelley;Oyarzún, Ricardo

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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。根据来自智利中北部乔帕盆地9个监测站的数据,将成分行为分为恒定、富集或稀释。B、As和Cu均呈恒定态。在一些位点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,其中Na+、Mg2+、Cl−、SO4−2和K+对水流变化的响应表现出更大的变异性。Fe、Al、Mn和Zn表现出富集行为,其中Al和Fe表现出较大的变异性。基于历史C-Q关系和气候变化下水流变化的现有预估,2010 - 2040年各组分浓度的变化可能不超过历史平均值的±10%,2040 - 2070年的变化可能不超过±15%。特别是Fe和Mn需要在未来特别关注。
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−, SO4−2and 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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