A coupled three‐dimensional hydrodynamic model for predicting hypolimnetic oxygenation and epilimnetic mixing in a shallow eutrophic reservoir
A coupled three‐dimensional hydrodynamic model for predicting hypolimnetic oxygenation and epilimnetic mixing in a shallow eutrophic reservoir
复制标题
用于预测浅层富营养化水库浅层氧化和表层混合的耦合三维水动力模型
DOI：
10.1002/2016wr019279
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发表时间：
2017
影响因子：
5.4
通讯作者：
John C. Little
中科院分区：
文献类型：
--
作者：
Shengyang Chen;C. Lei;C. Carey;P. Gantzer;John C. Little
人工搅拌和低浅层充氧是改善水库水质的两种常用方法。为了研究它们的运行对水柱热结构的影响，我们使用了三维水动力模型，结合新开发的水射流模型和现有的线性气泡羽流模型，并结合饮用水水库的全水库原位混合实验。该水库安装了侧流过饱和（SSS）浅湖充氧系统和气泡羽流表层混合（EM）系统，以减少浅湖缺氧和藻华。结果表明，SSS 成功地向下层水层添加了溶解氧，而没有使储层去层化，而位于下层水层边界的 EM 加深了该边界，并部分混合了层层水层和表层层。新开发的喷水模型与水动力模型相结合可以成功预测储层热结构的变化。 SSS 和 EM 系统对储层热结构的影响程度也可以通过耦合水动力模型的进一步应用来量化。
Artificial mixing and hypolimnetic oxygenation are two common methods for improving water quality in reservoirs. To examine the effects of their operation on the thermal structure of the water column, we used a three‐dimensional hydrodynamic model coupled with a newly developed water‐jet model and an existing linear bubble‐plume model in conjunction with whole‐reservoir in situ mixing experiments in a drinking‐water reservoir. This reservoir has a side‐stream supersaturation (SSS) hypolimnetic oxygenation system and a bubble‐plume epilimnetic mixing (EM) system installed to reduce hypolimnetic hypoxia and algal blooms. The results show that the SSS successfully adds dissolved oxygen to the hypolimnion without destratifying the reservoir, whereas the EM, located at the lower metalimnetic boundary, deepens this boundary and partially mixes the metalimnion and epilimnion. The newly developed water‐jet model coupled with the hydrodynamic model can successfully predict the variation of the thermal structure in the reservoir. The extent to which the SSS and EM systems affect the thermal structure of the reservoir is also quantified by further application of the coupled hydrodynamic model.