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Barrage

The Experts below are selected from a list of 327 Experts worldwide ranked by ideXlab platform

Roger Alexander Falconer – 1st expert on this subject based on the ideXlab platform

  • Potential impacts of a Barrage on the eutrophic status of the Severn Estuary, UK
    , 2020
    Co-Authors: Margaret Osikhofe Kadiri, Bettina Nicole Bockelmann-evans, Reza Ahmadian, Roger Alexander Falconer

    Abstract:

    The potential impacts of a Barrage on the eutrophic status of the Severn Estuary were investigated in this study using a simple modelling approach adopted by the UK’s Comprehensive Studies Task Team (CSTT). The model predictions were compared against CSTT thresholds for assessing eutrophication in coastal waters. Under both preand post-Barrage (ebb-only generation) conditions, the estuary was found to be potentially eutrophic as the predicted equilibrium nutrient concentrations and potential maximum phytoplankton biomass exceeded the CSTT thresholds. Potential primary productivity under post-Barrage conditions was found to be significantly higher than that under pre-Barrage conditions. This is believed to be due to a combination of increased water residence time and greater light availability behind the Barrage. Keywords— Barrage; Eutrophication; Nutrients; Severn Estuary; Primary Productivity

  • The Severn Barrage: Europe’s largest proposed marine renewable energy project
    , 2020
    Co-Authors: Roger Alexander Falconer

    Abstract:

    The Severn Barrage project proposes to develop marine renewable energy by building a Barrage (dam) stretching from the English coast to the Welsh coast across the Severn Estuary and Bristol Channel. This presentation will highlight recent research on the application of computational hydro-environmental models to predict the impacts of the proposed Severn Barrage project on tidal currents and sediment transport as well as bacterial-sediment interactions.

  • Input-output modelling of tidal renewable energy
    , 2020
    Co-Authors: E. K. Fenrich, Reza Ahmadian, Bettina Nicole Bockelmann-evans, W. Marks, Roger Alexander Falconer

    Abstract:

    Tidal renewable energy schemes have a variety of economic and ecological effects. It is therefore necessary to use models that can integrate these effects and sometimes conflicting requirements. An input-output model has been applied to the Severn Barrage, one of the proposed tidal Barrages on the Severn Estuary. While this project could produce around 17 TWH per annum of carbon free electricity which is around 5% of the UK electricity demand, diverse impacts on habitats as well as different users of the estuary have to be taken into account. First an input-output graph was set up to define linkages between different sectors of the project. From this a quantitative input-output model was derived. Economic and ecological requirements were specified as output demands of the system and a set of needed monetary and natural resources inputs was calculated. With these results feasible construction and management scenarios can be selected.

Reza Ahmadian – 2nd expert on this subject based on the ideXlab platform

  • Potential impacts of a Barrage on the eutrophic status of the Severn Estuary, UK
    , 2020
    Co-Authors: Margaret Osikhofe Kadiri, Bettina Nicole Bockelmann-evans, Reza Ahmadian, Roger Alexander Falconer

    Abstract:

    The potential impacts of a Barrage on the eutrophic status of the Severn Estuary were investigated in this study using a simple modelling approach adopted by the UK’s Comprehensive Studies Task Team (CSTT). The model predictions were compared against CSTT thresholds for assessing eutrophication in coastal waters. Under both preand post-Barrage (ebb-only generation) conditions, the estuary was found to be potentially eutrophic as the predicted equilibrium nutrient concentrations and potential maximum phytoplankton biomass exceeded the CSTT thresholds. Potential primary productivity under post-Barrage conditions was found to be significantly higher than that under pre-Barrage conditions. This is believed to be due to a combination of increased water residence time and greater light availability behind the Barrage. Keywords— Barrage; Eutrophication; Nutrients; Severn Estuary; Primary Productivity

  • Input-output modelling of tidal renewable energy
    , 2020
    Co-Authors: E. K. Fenrich, Reza Ahmadian, Bettina Nicole Bockelmann-evans, W. Marks, Roger Alexander Falconer

    Abstract:

    Tidal renewable energy schemes have a variety of economic and ecological effects. It is therefore necessary to use models that can integrate these effects and sometimes conflicting requirements. An input-output model has been applied to the Severn Barrage, one of the proposed tidal Barrages on the Severn Estuary. While this project could produce around 17 TWH per annum of carbon free electricity which is around 5% of the UK electricity demand, diverse impacts on habitats as well as different users of the estuary have to be taken into account. First an input-output graph was set up to define linkages between different sectors of the project. From this a quantitative input-output model was derived. Economic and ecological requirements were specified as output demands of the system and a set of needed monetary and natural resources inputs was calculated. With these results feasible construction and management scenarios can be selected.

  • comparison of hydro environmental impacts for ebb only and two way generation for a severn Barrage
    Computers & Geosciences, 2014
    Co-Authors: Reza Ahmadian, Roger Alexander Falconer, Bettina Nicole Bockelmannevans

    Abstract:

    Marine renewable energy is playing an increasing significant role in many parts of the world, mainly due to a rise in the awareness of climate change, and its detrimental effects, and the increasing cost of natural resources. The Severn Estuary, located between South West England and South Wales, has a tidal range of up to 14m which makes it the second highest tidal range in the world. There are a number of Barrage proposals amongst various marine renewable energy schemes proposed to be built in the estuary. The Cardiff-Weston STPG (Severn Tidal Power Group) Barrage, which would be one of the world’s largest tidal renewable energy schemes if built, is one of the most publicised schemes to-date. This Barrage would generate about 17TWh/annum of power, which is approximately 5% of the UK’s electricity consumption, whilst causing significant hydro-environmental and ecological impact on the estuary.This study mainly focuses on investigating the hydro-environmental impacts of the STPG Barrage for the option of two-way generation, and compares this with the commonly investigated option of ebb-only generation. The impacts of the Barrage were modelled by implementing a linked 1-D/2-D hydro-environmental model, with the capability of modelling several key environmental processes. The model predictions show that the hydro-environmental impacts of the Barrage on the Severn Estuary and Bristol Channel, such as changes in the maximum velocity and reduction in suspended sediment and bacteria levels, were less significant for the two-way generation scheme when compared with the corresponding impacts for ebb-only generation. Display Omitted

Bettina Nicole Bockelmannevans – 3rd expert on this subject based on the ideXlab platform

  • comparison of hydro environmental impacts for ebb only and two way generation for a severn Barrage
    Computers & Geosciences, 2014
    Co-Authors: Reza Ahmadian, Roger Alexander Falconer, Bettina Nicole Bockelmannevans

    Abstract:

    Marine renewable energy is playing an increasing significant role in many parts of the world, mainly due to a rise in the awareness of climate change, and its detrimental effects, and the increasing cost of natural resources. The Severn Estuary, located between South West England and South Wales, has a tidal range of up to 14m which makes it the second highest tidal range in the world. There are a number of Barrage proposals amongst various marine renewable energy schemes proposed to be built in the estuary. The Cardiff-Weston STPG (Severn Tidal Power Group) Barrage, which would be one of the world’s largest tidal renewable energy schemes if built, is one of the most publicised schemes to-date. This Barrage would generate about 17TWh/annum of power, which is approximately 5% of the UK’s electricity consumption, whilst causing significant hydro-environmental and ecological impact on the estuary.This study mainly focuses on investigating the hydro-environmental impacts of the STPG Barrage for the option of two-way generation, and compares this with the commonly investigated option of ebb-only generation. The impacts of the Barrage were modelled by implementing a linked 1-D/2-D hydro-environmental model, with the capability of modelling several key environmental processes. The model predictions show that the hydro-environmental impacts of the Barrage on the Severn Estuary and Bristol Channel, such as changes in the maximum velocity and reduction in suspended sediment and bacteria levels, were less significant for the two-way generation scheme when compared with the corresponding impacts for ebb-only generation. Display Omitted