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首页> 外文期刊>Journal of the American Water Resources Association >Mitigating Impact of Devils Lake Flooding on the Sheyenne River Sulfate Concentration
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Mitigating Impact of Devils Lake Flooding on the Sheyenne River Sulfate Concentration

机译：减轻魔鬼湖洪水对Sheyenne河硫酸盐浓度的影响

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摘要

Devils Lake is a terminal lake located in northeast North Dakota. Because of its glacial origin and accumulated salts from evaporation, the lake has a high concentration of sulfate compared to the surrounding water bodies. From 1993 to 2011, Devils Lake water levels rose by 10 m, which flooded surrounding communities and increased the chance of an overspill to the Sheyenne River. To control the flooding, the State of North Dakota constructed two outlets to pump the lake water to the river. However, the pumped water has raised concerns about of water quality degradation and potential flooding risk of the Sheyenne River. To investigate these perceived impacts, a Soil and Water Assessment Tool (SWAT) model was developed for the Sheyenne River and it was linked to a coupled SWAT and CE-QUAL-W2 model that was developed for Devils Lake in a previous study. While the current outlet schedule has attempted to maintain the total river discharge within the confines of a two-year flood (36 m(3)/s), our simulation from 2012 to 2018 revealed that the diversion increased the Sheyenne River sulfate concentration from an average of 125 to >750 mg/L. Furthermore, a conceptual optimization model was developed with a goal of better preserving the water quality of the Sheyenne River while effectively mitigating the flooding of Devils Lake. The optimal solution provides a "win-win" outlet management that maintains the efficiency of the outlets while reducing the Sheyenne River sulfate concentration to <= 600 mg/L.
机译：魔鬼湖是位于北达科他州东北部的终端湖。由于其冰河起源和蒸发中积累的盐分，与周围的水体相比，该湖的硫酸盐浓度很高。从1993年到2011年，魔鬼湖的水位上升了10 m，淹没了周围社区，并增加了向Sheyenne河溢出的可能性。为了控制洪水，北达科他州建立了两个出口，将湖水泵入河中。但是，抽水引起了人们对水质恶化和Sheyenne河潜在洪灾风险的担忧。为了调查这些感知到的影响，开发了针对Sheyenne河的土壤和水评估工具（SWAT）模型，并将其与先前研究中为Devils Lake开发的SWAT和CE-QUAL-W2耦合模型相链接。虽然目前的出水时间表试图将总河流量保持在两年洪水（36 m（3）/ s）的范围内，但我们从2012年到2018年的模拟显示，分流使Sheyenne河的硫酸盐浓度从平均125至> 750 mg / L。此外，开发了一种概念优化模型，其目标是更好地保留Sheyenne河的水质，同时有效减轻Devils湖的洪水。最佳解决方案可提供“双赢”的出口管理，在维持出口效率的同时将Sheyenne River的硫酸盐浓度降低至<= 600 mg / L。

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