Evaluation of Sediment Transport in the Naiband Gulf Area Using Mike21

Soltani, Parviz; Askar, Mehdi Behdarvandi; Bahrami, Hossein; Pour, Sadegh Haghighi

doi:10.4236/ojg.2017.72012

Cited by 6 publications

(4 citation statements)

References 5 publications

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“…The numerical model predicted pollutant concentration and revealed the diffusion of pollutants. The model has shown good performance in the evaluation of sediment transport in the Naiband Gulf Area and the diffusion source of the Bai River [34,35]. The industrial and marine aquaculture industries in Jinpu Bay are relatively concentrated, causing significant pressure on the capacity of the marine environment.…”

Section: Discussionmentioning

confidence: 99%

Numerical Simulation of the Marine Environmental Capacity of Jinpu Bay

Hao,

Cui,

Zhang

et al. 2024

Water

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Based on the study of the marine environmental capacity, a water quality model and a response field-based linear programming method are adopted here. Water quality control objectives are taken as the constraint conditions, according to the requirements of Jinpu Bay’s functional zoning. The pollutant response coefficient and water quality background value are combined with the values of the water concentration quality control points set in each functional area and the target value of the functional area wherein they are located. The maximum allowable emission intensity of inorganic nitrogen, phosphate and chemical oxygen demand (COD) can be calculated using the linear programming method of the maximum allowable emission of pollutants at estuaries or sewage outfall points on Jinpu Bay. The research results reveal the diffusion of marine pollutants and the marine environmental capacity of Jinpu Bay. Some rivers need to reduce the discharge intensity and some other outlets still have a certain residual capacity. Based on this, the environmental capacity of Jinpu Bay was evaluated, and a technical reference is provided for the economic development of the region and the formulation of pollutant emission control policies.

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Section: Discussionmentioning

confidence: 99%

Numerical Simulation of the Marine Environmental Capacity of Jinpu Bay

Hao,

Cui,

Zhang

et al. 2024

Water

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“…MIKE 21 is a comprehensive modelling system used to simulate hydraulics and hydraulic-related phenomena in different bodies of water. The system contains a wide range of engineering and environmental applications that can be used to examine coastal hydraulics, oceanography, wave dynamics, harbours, rivers, environmental hydraulics, and sediment processes [6,25,28]. After more than 25 years of continuous development and improvement, MIKE 21 now combines the experiences of thousands of worldwide users.…”

Section: Introductionmentioning

confidence: 99%

Impact of spring freshet flooding and summer rainfall flooding on the water quality of an alpine barrier lake

Li³

et al. 2020

Environ Sci Eur

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Background: Barrier lakes, formed by river interception, are particularly influenced by the upstream river. As such, spring freshet flooding and summer rainfall flooding due to wet precipitation (e.g. snow and rainfall) may sharply increase the concentrations of nitrogen, phosphorous, and carbon compounds in barrier lakes. Too much nutrients will lead to lake eutrophication. In this study, we used Lake Jingpo, the world's second largest alpine barrier lake, to examine the impact of spring freshet flooding and summer rainfall flooding on its water quality by building a hydrodynamic water quality model with MIKE 21. Results: The MIKE 21 HD hydrodynamic model and MIKE 21 AD convection and diffusion module were calibrated using meteorological data, hydrological data, and water quality data collected in 2018. All errors were in the acceptable range. According to model simulation results, the flow velocity in Lake Jingpo is generally weak (mostly lower than 0.015 m/s), but it increases to 0.045 m/s and above during spring freshet flooding (April-May) and summer rainfall flooding (August-September), which is much higher than in other months. The flow volume of its largest inflowing river reaches 4.81 × 10 8 m 3 , 29.77 × 10 8 m 3 , and 58.4 × 10 8 m 3 during spring freshet flooding, summer rainfall flooding, and 30-year frequency rainfall flooding period, respectively. The longest diffusion distances from the lake mouth to the downstream way are 16.3 km, 33.1 km, and 43.6 km during the spring freshet flooding, summer rainfall flooding, and 30-year frequency rainfall flooding period, respectively. A larger amount of precipitation leads to longer diffusion distances and increased concentrations of total nitrogen (TN), total phosphorous (TP), chemical oxygen demand (COD Mn), and ammonia-nitrogen (NH 4-N) in the lake. Conclusions: The sudden increase in water volume during spring flooding and summer rainfall flooding led to the rapid spread of nutrients and pollutants carried by the water into the barrier lake, resulting in a deterioration of lake water quality. In addition to pollution source control measures, ecological restoration, and the construction of a buffer system in the catchment are very important measures to effectively improve the buffer capacity of barrier lakes in light of spring freshet flooding and summer rainfall flooding.

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“…MIKE 21 is a comprehensive modelling system used to simulate hydraulics and hydraulic-related phenomena in different bodies of water. The system contains a wide range of engineering and environmental applications that can be used to examine coastal hydraulics, oceanography, wave dynamics, harbours, rivers, environmental hydraulics, and sediment processes (Warren and Bach, 1992;Chubarenko and Tchepikova, 2001;Soltani et al, 2017). After more than 25 years of continuous development and improvement, MIKE 21 now combines the experiences of thousands of worldwide users.…”

Section: Introductionmentioning

confidence: 99%

Impact of Spring Freshet Flooding and Summer Rainfall Flooding on the Water Quality of an Alpine Barrier Lake

LI³

et al. 2020

Preprint

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Background: Barrier lakes, formed by river interception, are particularly influenced by the upstream river. As such, spring freshet flooding and summer rainfall flooding due to wet precipitation (e.g. snow and rainfall) may sharply increase the concentrations of nitrogen, phosphorous and carbon compounds in barrier lakes. Too much nutrients will lead to lake eutrophication. In this study, we used Lake Jingpo, the world’s second largest alpine barrier lake, to examine the impact of spring freshet flooding and summer rainfall flooding on its water quality by building a hydrodynamic water-quality model with MIKE 21. Results:The MIKE 21 HD hydrodynamic model and MIKE 21 AD convection and diffusion module were calibrated using meteorological data, hydrological data, and water quality data collected in 2018. All errors were in the acceptable range. According to model simulation results, the flow velocity in Lake Jingpo is generally weak (mostly lower than 0.015 m/s), but it increases to 0.045 m/s and above during spring freshet flooding (April–May) and summer rainfall flooding (August–September), which is much higher than in other months. The flow volume of its largest inflowing river reaches 4.81×108 m3, 29.77×108 m3, and 58.4×108 m3 during spring freshet flooding, summer rainfall flooding, and 30-year frequency rainfall flooding period, respectively. The longest diffusion distances from the lake mouth to the downstream way are 16.3 km, 33.1 km, and 43.6 km during the spring freshet flooding, summer rainfall flooding, and 30-year frequency rainfall flooding period, respectively. A larger amount of precipitation leads to longer diffusion distances and increased concentrations of total nitrogen (TN), total phosphorous (TP), chemical oxygen demand (CODMn), and ammonia-nitrogen (NH4-N) in the lake. Conclusions: The sudden increase in water volume during spring flooding and summer rainfall flooding led to the rapid spread of nutrients and pollutants carried by the water into the barrier lake, resulting in a deterioration of lake water quality. In addition to pollution source control measures, ecological restoration and the construction of a buffer system in the catchment are very important measures to effectively improve the buffer capacity of barrier lakes in light of spring freshet flooding and summer rainfall flooding.

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Evaluation of Sediment Transport in the Naiband Gulf Area Using Mike21

Cited by 6 publications

References 5 publications

Numerical Simulation of the Marine Environmental Capacity of Jinpu Bay

Numerical Simulation of the Marine Environmental Capacity of Jinpu Bay

Impact of spring freshet flooding and summer rainfall flooding on the water quality of an alpine barrier lake

Impact of Spring Freshet Flooding and Summer Rainfall Flooding on the Water Quality of an Alpine Barrier Lake

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