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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：水源的时空变异控制了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：我们在一年内开展了三个季节的舞台调查，以评估犹他州的复杂水基础设施的城市河流水源和地球化学中的变化。在贝叶斯混合模型框架和单独的水文质量平衡方法中，使用河水（Delta O-18和Delta H-2）的稳定同位素，我们量化了与“自然”相关的比例输入和大小（湖泊，地下水和支流投入）和“工程化”（流出物和运河流入）来源。这些主要贡献者对流流的相对重要性在空间和季节性上变化。溶解氧，温度，pH，钙，氯化物，硝酸盐和正磷酸盐的时空模式表明，河水中主要来源的季节变化在确定水质方面发挥了重要作用。虽然城市河流明显受水资源基础设施创造的新型水源的影响，但它们继续反映“自然”水源的印记，包括弥漫性地下水。因此，资源管理人员可能需要考虑两种表面水域的数量，也需要历史上忽视地下水投入，以解决城市河流的水质问题。

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