A numerical study of the temperature dynamics at McNary Dam

Politano, Marcela; Haque, Md. Manjurul; Weber, Larry

doi:10.1016/j.ecolmodel.2007.10.040

Cited by 36 publications

(19 citation statements)

References 34 publications

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“…On the other boundaries, the non-slip conditions for velocity and zero heat flux for temperature and the standard wall functions were imposed [16,43].…”

Section: Velocitymentioning

confidence: 99%

“…Changes in temperature in water body might occur mainly due to heat exchange across the air-water interface. Accurate estimation of heat fluxes is extremely crucial in the simulation of temperature dynamics in the water body [16]. Atmospheric heat fluxes include incoming short-wave (solar) and long-wave (atmosphere) radiations, outgoing long-wave radiation, conductive heat at the free surface and evaporative heat flux.…”

Section: Governing Equationsmentioning

confidence: 99%

“…The values of f i and η i are presented in Table 1. The attenuation coefficient (light extinction coefficient) for visible light theoretically is a function of wave length, temperature and water turbidity [16,41] and typically ranges from 0.02 to 31.6 for inland shallow waters [16,[41][42][43][44]. Usually a linear relationship is applied to calculate the extinction coefficient value from observed Secchi depth in inland water bodies [16,45].…”

Section: Governing Equationsmentioning

confidence: 99%

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Investigation of Temperature Dynamics in Small and Shallow Reservoirs, Case Study: Lake Binaba, Upper East Region of Ghana

Abbasi

Annor

Giesen

2016

Water

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An unsteady fully three-dimensional model of Lake Binaba (a shallow small reservoir) in semi-arid Upper East Region of Ghana has been developed to simulate its temperature dynamics. The model developed is built on the Reynolds Averaged Navier-Stokes (RANS) equations, utilizing the Boussinesq approach. As the results of the model are significantly affected by the physical conditions on the boundaries, allocating appropriate boundary conditions, particularly over a water surface, is essential in simulating the lake's thermal structure. The thermal effects of incoming short-wave radiation implemented as a heat source term in the temperature equation, while the heat fluxes at the free water surface, which depend on wind speed, air temperature, and atmospheric stability conditions are considered as temperature boundary condition. The model equations were solved using OpenFOAM CFD toolbox. As the flow is completely turbulent, which is affected by the complex boundary conditions, a new heat transfer solver and turbulence model were developed to investigate the spatial and temporal distribution of temperature in small and shallow inland water bodies using improved time-dependent boundary conditions. The computed temperature values were compared with four days of observed field data. Simulated and observed temperature profiles show reasonable agreement where the root mean square error (RMSE) over the simulation period ranges from 0.11 to 0.44˝C in temporal temperature profiles with an average value of 0.33˝C. Results indicate that the model is able to simulate the flow variables and the temperature distribution in small inland water bodies with complex bathymetry.

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“…On the other boundaries, the non-slip conditions for velocity and zero heat flux for temperature and the standard wall functions were imposed [16,43].…”

Section: Velocitymentioning

confidence: 99%

Section: Governing Equationsmentioning

confidence: 99%

Section: Governing Equationsmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of Temperature Dynamics in Small and Shallow Reservoirs, Case Study: Lake Binaba, Upper East Region of Ghana

Abbasi

Annor

Giesen

2016

Water

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“…Therefore, it is very necessary for most developing countries to better understand the availability and precisions of different water quality models and their methods of calculation and calibration and progress in the model standardization in order to apply effectively these models and form a good model regulation system [11, 12]. In particular, this work can contribute to making better environmental management policies and authorizing reasonable construction projects.…”

Section: Signature Of Water Quality Modelsmentioning

confidence: 99%

A Review of Surface Water Quality Models

Wang

Jia

et al. 2013

The Scientific World Journal

114

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Surface water quality models can be useful tools to simulate and predict the levels, distributions, and risks of chemical pollutants in a given water body. The modeling results from these models under different pollution scenarios are very important components of environmental impact assessment and can provide a basis and technique support for environmental management agencies to make right decisions. Whether the model results are right or not can impact the reasonability and scientificity of the authorized construct projects and the availability of pollution control measures. We reviewed the development of surface water quality models at three stages and analyzed the suitability, precisions, and methods among different models. Standardization of water quality models can help environmental management agencies guarantee the consistency in application of water quality models for regulatory purposes. We concluded the status of standardization of these models in developed countries and put forward available measures for the standardization of these surface water quality models, especially in developing countries.

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“…Most researchers have reported the release of heavy metals from the soil and their biological toxicity 5–7, soil erosion, and landslides 8 and greenhouse gas emissions 9. Moreover, reservoir construction can cause a lot of water retained in front of the dam and then increase in heat storage capacity, which can result in different water temperature distribution patterns in reservoir area compared to the natural river 10, 11. Moreover, the obvious stratification of water temperature can appear in reservoir area with deeper water levels 12, 13.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Water Temperature as Affected by a Pre‐Constructed Reservoir Project Based on MIKE11

Wang

2013

CLEAN Soil Air Water

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Research Article Prediction of Water Temperature as Affected by a Pre-Constructed Reservoir Project Based on MIKE11Reservoir construction can lead to much more water stored in front of the dam and significantly increase heat storage capacity of the reservoir waters, thus resulting in different distribution pattern of water temperature in reservoir area compared to river. Especially for large reservoir, the obvious stratification of water temperature will appear in the reservoir with deeper water levels. Meanwhile, the low water temperature will be observed in the downstream river due to the operation of the reservoir. The vertical numerical simulation model for reservoir from MIKE 11 was used to predict the changes of water temperature of Wuxikou Reservoir to check the effects of the reservoir construction on water temperature. The water temperature prediction model was developed to simulate the water temperature of the reservoir and the discharged outflow water. The predicted results can contribute to assessing the feasibility of the pre-constructed project based on the environmental influence of water temperature. IntroductionWith the development of economy and society and the rapid increase in population, the worldwide water demands have been greatly increased, and thus resulting in more and more reservoirs were constructed [1][2][3]. In China, the number of reservoirs accounted for approximately 52% of total number of the world [4]. However, some ecological and environmental effects of reservoir construction have been recognized. Most researchers have reported the release of heavy metals from the soil and their biological toxicity [5][6][7], soil erosion, and landslides [8] and greenhouse gas emissions [9]. Moreover, reservoir construction can cause a lot of water retained in front of the dam and then increase in heat storage capacity, which can result in different water temperature distribution patterns in reservoir area compared to the natural river [10,11]. Moreover, the obvious stratification of water temperature can appear in reservoir area with deeper water levels [12,13]. The lower temperature of the discharged outflow waters will be caused behind the dam due to the operation of reservoir, and thus changing water temperature in the downstream river channel. This can greatly influence fish habitats [14] and agricultural activities in the downstream region. Therefore, many researchers and governments have paid much more attention to the water temperature distribution in reservoir and the outflow waters with lower temperature.Water temperature of reservoir has been studied since the 1930s [9]. Moreover, water temperature prediction is also the core of the appraisal of environmental impact assessment for large reservoir construction. A lot of numerical models have also been developed to simulate water temperature changes in reservoir area [15][16][17]. Ferrarin and Umgiesser [18] confirmed that the temperature distribution could be better simulated using hydrodynamic model. However, the studies above have...

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A numerical study of the temperature dynamics at McNary Dam

Cited by 36 publications

References 34 publications

Investigation of Temperature Dynamics in Small and Shallow Reservoirs, Case Study: Lake Binaba, Upper East Region of Ghana

Investigation of Temperature Dynamics in Small and Shallow Reservoirs, Case Study: Lake Binaba, Upper East Region of Ghana

A Review of Surface Water Quality Models

Prediction of Water Temperature as Affected by a Pre‐Constructed Reservoir Project Based on MIKE11

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