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首页> 外文期刊>Journal of the American Water Resources Association >Spatiotemporal Variability in Water Sources Controls Chemical and Physical Properties of a Semi-arid Urban River System
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Spatiotemporal Variability in Water Sources Controls Chemical and Physical Properties of a Semi-arid Urban River System

机译：水资源的时空变化控制半干旱城市河流系统的化学和物理性质

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摘要

We conducted synoptic surveys over three seasons in one year to evaluate the variability in water sources and geochemistry of an urban river with complex water infrastructure in the state of Utah. Using stable isotopes of river water (delta O-18 and delta H-2) within a Bayesian mixing model framework and a separate hydrologic mass balance approach, we quantified both the proportional inputs and magnitude of discharge associated with "natural" (lake, groundwater, and tributary inputs) and "engineered" (effluent and canal inflows) sources. The relative importance of these major contributors to streamflow varied both spatially and seasonally. Spatiotemporal patterns of dissolved oxygen, temperature, pH, calcium, chloride, nitrate, and orthophosphate indicated seasonal shifts in dominant sources of river water played an important role in determining water quality. We show although urban rivers are clearly influenced by novel water sources created by water infrastructure, they continue to reflect the imprint of "natural" water sources, including diffuse groundwater. Resource managers thus may need to account for the quantity of both surface waters and also historically overlooked groundwater inputs to address water quality concerns in urban rivers.
机译：我们在一年中的三个季节进行了天气概况调查，以评估犹他州具有复杂水基础设施的城市河流的水源和地球化学变化。在贝叶斯混合模型框架内使用稳定的河水同位素（δO-18和δH-2）和单独的水文质量平衡方法，我们量化了与“自然”（湖泊）相关的比例输入和排放量，地下水和支流输入）和“工程”（污水和运河入流）源。这些主要因素对流量的相对重要性在空间和季节上都不同。溶解氧，温度，pH，钙，氯化物，硝酸盐和正磷酸盐的时空格局表明，河水的主要来源的季节性变化在确定水质中起着重要作用。我们表明，尽管城市河流显然受到水基础设施创造的新型水源的影响，但它们仍在反映“自然”水源的烙印，包括扩散的地下水。因此，资源管理者可能需要考虑地表水的数量以及历史上被忽视的地下水输入量，以解决城市河流中的水质问题。

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