Hydrodynamic and water quality modeling of Lake Manzala (Egypt) under data scarcity

Elshemy, Mohamed; Khadr, Mosaad; Atta, Y.; Ahmed, A. A. Masrur

doi:10.1007/s12665-016-6136-x

Cited by 31 publications

(11 citation statements)

References 26 publications

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“…e flow velocity dominates the transfer of heat and contaminant, while the buoyancy induced by the nonuniform distribution of temperature and concentration has an impact on the water flows. To simulate the buoyancy flows and realize the two-way coupling between the three fields, an additional body forcing term Fi needs to be attached to equation (7).…”

Section: 32mentioning

confidence: 99%

“…e following equation should be obtained through filtering equation (7) and assuming f eq i (ρ, u) � f eq i (ρ, u).…”

Section: Large Eddy Simulation For Turbulencementioning

confidence: 99%

“…At present, the general methods for studying heat and contaminant transfer in LS-FS flows are mainly two-dimensional (2D) numerical models, especially shallow water equations coupling convection-diffusion equations for simulating planar flow problems [4,5]. e 2D numerical simulations have been one of the most commonly used methods to analyze large-scale flows with heat and contaminant transfer, such as flows in reservoirs [6], lakes [7], and oceans [8]. However, the 2D method could not analyze the vertical temperature and pollutant distribution, and the plane simulation results are also not accurate enough because of the lack of vertical velocity effect, which evidently limits the applications of 2D models in engineering practice.…”

Section: Introductionmentioning

confidence: 99%

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Three‐Dimensional Numerical Modeling of Large‐Scale Free Surface Flows with Heat and Contaminant Transfer in Reservoirs

Diao

Yuan

Chen³

et al. 2021

Advances in Civil Engineering

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The temperature distribution and pollutant distribution in large reservoirs have always been a hotspot in the field of hydraulics and environmentology, and the three-dimensional numerical modeling that can effectively simulate the interactions between the temperature fields, concentration fields, and flow fields needs to be proposed. The double-diffusive convection lattice Boltzmann method is coupled with a single-phase volume of fluid model for simulating heat and contaminant transfer in large-scale free surface flows. The coupling model is used to simulate the double-diffusive natural convection in a cubic cavity and the temperature distribution of a model reservoir. The mechanism of convection-diffusion, gravity sinking flow, and the complexity of the temperature and the pollutant redistribution process are analyzed. Good agreements between the simulated results and the reference data validate the accuracy and effectiveness of the proposed coupling model in studying free surface flows with heat and contaminant transfer. At last, the temporal and spatial variations of flow state, water temperature stratification, and pollutant transport in the up-reservoir of a pumped-storage power station are simulated and analyzed by the proposed model. The obtained variations of the flow field agree well with the observations in the physical model test and in practical engineering. In addition, the simulated temperature field and concentration field are also consistent with the general rules, which demonstrates the feasibility of the coupling model in simulating temperature and pollutant distribution problems in realistic reservoirs and shows its good prospects in engineering application.

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Section: 32mentioning

confidence: 99%

“…e following equation should be obtained through filtering equation (7) and assuming f eq i (ρ, u) � f eq i (ρ, u).…”

Section: Large Eddy Simulation For Turbulencementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Three‐Dimensional Numerical Modeling of Large‐Scale Free Surface Flows with Heat and Contaminant Transfer in Reservoirs

Diao

Yuan

Chen³

et al. 2021

Advances in Civil Engineering

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“…Therefore, mathematical modeling coupled with observations for verification and calibration is essential in such cases. Hydrodynamic and water quality models have been widely developed and used for the investigations of rivers [1][2][3][4], lakes or reservoirs [5][6][7][8][9][10][11], estuaries [12,13], and coastal waters [14,15] on various aspects. These models have been effective tools for explaining, simulating, and forecasting the complex processes in water environment.…”

Section: Introduction To Surface Water Systemsmentioning

confidence: 99%

Application of a Hydrodynamic and Water Quality Model for Inland Surface Water Systems

Liu¹

2018

Applications in Water Systems Management and Modeling

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This chapter introduces basic concepts, properties, and principles of different processes in inland surface water and analytical methodologies. The fundamentals of surface water hydrodynamics, including water properties, hydrodynamic processes, Cartesian coordinatebased governing equations, and boundary and initial conditions were reviewed. The fate and transport of contaminants in surface water were introduced. Based on aforementioned theory and principles, two hydrodynamic-water quality models were developed for studying a lake and a river, respectively. A stratified 3D model was used to investigate the circulation and E. coli transport in the nearshore region of Lake Michigan. The modeling results show that stratified phenomenon exists in the near region, and a 3D model is necessary even though a previous 2D model works well for the shallow water environment. A 2D depth-averaged water quality model was developed to estimate the fate and transport of four contaminants in the San Joaquin River of California. The modeling results indicate that it took 20 days for these contaminants to transport from the upstream to the downstream in the research domain. These models can be effectively used for inland surface water restoration and management.

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“…Bek et al [15], in 2011, constructed a hydrodynamic model for the lake using the Finite Volume Coastal Ocean Model (FVCOM) to characterize the hydrodynamics characteristics of the lake and to assess the application of a range of potential sustainable water management strategies. In 2016, Elshemy et al [6] had developed a hydrodynamic and water quality model for Lake Manzala using MIKE21 modelling system and this developed model was used to study the future impacts of climate change on the hydrodynamic characteristics of the lake [16].…”

Section: Introductionmentioning

confidence: 99%

Impact Assessment of Radial Channels Project on Water Quality Status in Lake Manzala, Eastern Nile Delta, Egypt

El-Hamaimi¹,

Mirdan

Elshemy

et al. 2018

Port-Said Engineering Research Journal

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Lake Manzala lies on the eastern north coast of Egypt and is considered as the largest Egyptian coastal lakes. Economically, Lake Manzala is considered as one of the most valuable fish sources in Egypt. The water quality status of the lake has been degraded due to the progressive increasing of industrial, municipal and agricultural wastewater discharge from six main drains. The lake has three main effective outlets, one to Suez Canal and the others to the Mediterranean Sea. A new project has been started in Lake Manzala to improve the sea-lake water exchange by dredging the two main lake outlets to the sea and constructing two radial channels from the lake to the sea passing through the two main outlets. In this work, a hydrodynamic, advection dispersion and water quality model for Lake Manzala was developed, based on MIKE21 modelling system. Eight water quality parameters were simulated (BOD, DO, Chll_a, NO 2 , NO 3 , NH 3 , PO 4 , and TP), in addition to three hydrodynamic parameters (water depth, water temperature and salinity). The model results show good agreement with the observed water depth, water temperature, salinity and water quality records. The calibrated model was used to investigate the impacts of radial channels on Lake Manzala hydrodynamic and water quality characteristics. The results show a significant improvement in the lake water quality status. Significant decreases in the average concentrations of some water quality parameters were noticed, comparing to the original calibrated status of the lake (-21%,-14%,-13% and-10% for PO 4 , NO 2 , NH 3 and Chll_aas examples). While an increase in the average concentration of DO in the lake by about 1% was noticed. Other water quality improvement scenarios for the lake should be investigated, in addition to the investigated scenario of radial channels, using the lake developed model.

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Hydrodynamic and water quality modeling of Lake Manzala (Egypt) under data scarcity

Cited by 31 publications

References 26 publications

Three‐Dimensional Numerical Modeling of Large‐Scale Free Surface Flows with Heat and Contaminant Transfer in Reservoirs

Three‐Dimensional Numerical Modeling of Large‐Scale Free Surface Flows with Heat and Contaminant Transfer in Reservoirs

Application of a Hydrodynamic and Water Quality Model for Inland Surface Water Systems

Impact Assessment of Radial Channels Project on Water Quality Status in Lake Manzala, Eastern Nile Delta, Egypt

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