scholarly journals COMBINING FLOOD DAMAGE MITIGATION WITH TIDAL ENERGY GENERATION: LOWERING THE EXPENSE OF STORM SURGE BARRIER COSTS

2020 ◽  
pp. 3
Author(s):  
David Basco
Keyword(s):  
Storm Surge ◽  
Tidal Flow ◽  
Energy Generation ◽  
Tidal Energy ◽  
Flood Damage ◽  
Ecological Change ◽  
Tidal Inlets ◽  
Tidal Flows ◽  
Tidal Estuaries ◽  
Hydraulic Turbines

Storm surge barriers across tidal inlets with navigation gates and tidal-flow gates to mitigate interior flood damage (when closed) and minimize ecological change (when open) are expensive. Daily high velocity tidal flows through the tidal-flow gate openings can drive hydraulic turbines to generate electricity. Money earned by tidal energy generation can be used to help pay for the high costs of storm surge barriers. This paper describes grey, green, and blue design functions for barriers at tidal estuaries. The purpose of this paper is to highlight all three functions of a storm surge barrier and their necessary tradeoffs in design when facing the unknown future of rising seas.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/Yjp3b0gU3_U

Maximum Lifecycle Tracking for Tidal Energy Generation System

2015 ◽  
Vol 43 (8-10) ◽  
pp. 1182-1192 ◽  
Author(s):  
Taofeek Orekan ◽  
Zhibing Zhao ◽  
Peng Zhang ◽  
Jian Zhang ◽  
Shengli Zhou ◽  
...  
Keyword(s):  
Energy Generation ◽  
Tidal Energy ◽  
Generation System

scholarly journals Tidal current power effects on nearby sandbanks: a case study in the Race of Alderney

2020 ◽  
Vol 378 (2178) ◽  
pp. 20190503 ◽  
Author(s):  
Luke S. Blunden ◽  
Stephen G. Haynes ◽  
AbuBakr S. Bahaj
Keyword(s):  
Sediment Transport ◽  
Tidal Energy ◽  
Sand Wave ◽  
Sand Transport ◽  
Tidal Dynamics ◽  
Tidal Flows ◽  
Tidal Turbine ◽  
Turbine Arrays ◽  
Sediment Model

A validated numerical model of tidal flows and sediment transport around the Alderney South Banks was used to investigate the potential effects of large (300 MW) tidal turbine arrays at different locations in Alderney territorial waters. Two methods were used, firstly looking at hydrodynamic changes only and secondly modelling sediment transport over a non-erodible bed. The baseline hydrodynamic model was validated relative to ADCP velocity data collected in the immediate vicinity of the sandbank. Real-world sand transport rates were inferred from sand-wave migrations and agree favourably with sediment transport residuals calculated from model outputs. Outputs from the sediment model reproduced realistic morphological behaviours over the bank. Seventeen different locations were considered; most did not result in significant hydrodynamic changes over the South Banks; however, three array locations were singled out as requiring extra caution if development were to occur. The results provide a case for optimizing the array locations for twin objectives of maximizing array power and minimizing impacts on the sandbanks. This article is part of the theme issue ‘New insights on tidal dynamics and tidal energy harvesting in the Alderney Race’.

scholarly journals Simulation of Tidal Energy Extraction, Using Fluent Model

2020 ◽  
Vol 160 ◽  
pp. 02002
Author(s):  
Hamidreza Alizadeh Hamedani
Keyword(s):  
Energy Dissipation ◽  
Water Surface ◽  
Tidal Flow ◽  
Free Water ◽  
Tidal Energy ◽  
Numerical Results ◽  
Energy Extraction ◽  
Flow Acceleration ◽  
Free Water Surface ◽  
Fluent Software

This study has been performed to develop our knowledge about marine sources energy extraction. Water in the channel has been simulated in laboratory scale by means of FLUENT software. The turbine tidal flow is generated by a moving disk which applies a pressure decrement with energy dissipation. Free water surface is estimated by means of fluid volume in the model which changes freely. The numerical results illustrate that eddy sequence has been generated after the tidal flow of turbine and a flow acceleration is generated nearby, especially beneath the energy extraction devise. Free water surface drop due to energy extraction is considered in model results that seems a to improve the turbine eddy sequence.

scholarly journals Assessing the turbulent kinetic energy budget in an energetic tidal flow from measurements of coupled ADCPs

2020 ◽  
Vol 378 (2178) ◽  
pp. 20190496 ◽  
Author(s):  
Maxime Thiébaut ◽  
Jean-François Filipot ◽  
Christophe Maisondieu ◽  
Guillaume Damblans ◽  
Rui Duarte ◽  
...  
Keyword(s):  
Kinetic Energy ◽  
Turbulent Kinetic Energy ◽  
Production Rate ◽  
Tidal Flow ◽  
Tidal Energy ◽  
Reynolds Stresses ◽  
Common Assumption ◽  
Non Local ◽  
Tke Dissipation Rate ◽  
Acoustic Doppler Current Profilers

Two coupled four-beam acoustic Doppler current profilers were used to provide simultaneous and independent measurements of the turbulent kinetic energy (TKE) dissipation rate ε and the TKE production rate P over a 36 h long period at a highly energetic tidal energy site in the Alderney Race. The eight-beam arrangement enabled the evaluation of the six components of the Reynolds stress tensor which allows for an improved estimation of the TKE production rate. Depth-time series of ε, P and the Reynolds stresses are provided. The comparison between ε and P was performed by calculating individual ratios of ε corresponding to P . The depth-averaged ratio ε / P averaged over whole flood and ebb tide were found to be 2.2 and 2.8 respectively, indicating that TKE dissipation exceeds TKE production. It is shown that the term of diffusive transport of TKE is significant. As a result, non-local transport is important to the TKE budget and the common assumption of a local balance, i.e. a balance between production and dissipation, is not valid at the measurement site. This article is part of the theme issue ‘New insights on tidal dynamics and tidal energy harvesting in the Alderney Race’.

scholarly journals NORTH SEA TIDE AND STORM SURGE INVESTIGATION

1984 ◽  
Vol 1 (19) ◽  
pp. 118 ◽  
Author(s):  
Winfried Siefert
Keyword(s):  
Storm Surge ◽  
North Sea ◽  
Coastal Waters ◽  
German Bight ◽  
Spring Tide ◽  
Coastal Engineering ◽  
Extensive Investigation ◽  
Secular Changes ◽  
Tidal Estuaries ◽  
Water Values

An extensive investigation of tide and storm surge measurements in the coastal waters of the southeastern North Sea (German Bight) is now being concluded, giving new hints to tidal behaviour in a complex area, consisting of extended tidal flats, interrupted by islands, sand banks, estuaries and gullies. The analysis was promoted by the "German Coastal Engineering Board" (KFKI) and will be the basis of further investigations of the storm surge conditions in tidal estuaries. Tidal records and high and low water values of 130 gauges in 2 an area of 12.000 km (5.000 sq.mi.) were used to evaluate cotidal lines in the German Bight mean tide curves regressions between different locations neap and spring tide conditions secular changes over the last 80 years storm surge development.

A fine grid tidal flow and storm surge model of the North Sea

1992 ◽  
Vol 12 (2-3) ◽  
pp. 213-233 ◽  
Author(s):  
G.K. Verboom ◽  
J.G. de Ronde ◽  
R.P. van Dijk
Keyword(s):  
Storm Surge ◽  
North Sea ◽  
Tidal Flow ◽  
Fine Grid ◽  
The North ◽  
The North Sea

scholarly journals Tidal Energy Flows between the Midriff Islands in the Gulf of California

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 621
Author(s):  
Federico Angel Velazquez-Muñoz ◽  
Anatoliy Filonov
Keyword(s):  
Kinetic Energy ◽  
Internal Wave ◽  
Gulf Of California ◽  
Current Flow ◽  
Tidal Flow ◽  
Three Dimensional ◽  
Tidal Energy ◽  
Ocean Model ◽  
Field Development ◽  
Wave Measurements

The Gulf of California has many regions of potential tidal-stream energy that have been identified and characterized using in-situ measurements and numerical ocean models. The Midriff Islands region has received particular attention due to its increased current speeds and high kinetic energy. This increase in energy can be seen in the formation of internal wave packets propagating for several hundred kilometers. Here we present a brief description of internal wave measurements travel towards the Northern Gulf and explore energy generation sites. In this paper we characterize the tidal inflow and outflow that passes throughout the Midriff Islands in the central part of the Gulf. We use a three-dimensional numerical ocean model that adequately reproduces the tidal flow and the increase in speed and kinetic energy between the islands. The current flow structure shows the highest velocity cores near the shore and far from the bottom. During the rising tide, the maximum current flow (~0.6 ms−1) was found between Turón Island and San Lorenzo Island, from the surface to 200 m depth. When the currents flowed out of the Gulf, during the falling tide, the maximum negative current (−0.8 ms−1) was found between Tiburon Island and Turón Island, from near the surface to 80 m depth. Although there are favorable conditions for power generation potential by tidal flows, the vertical variability of the current must be considered for field development and equipment installation sites.

GIS-based Estimation of Flood Damage according to Storm Surge Scenario

2017 ◽  
Vol 19 (2) ◽  
pp. 195-204
Author(s):  
Myeong Heum Cho ◽  
Jin Young Won ◽  
Young Jin Park
Keyword(s):  
Storm Surge ◽  
Flood Damage

scholarly journals Characteristics of Tide and Storm Surge in Konaruto Channel with a Rapid Tidal Flow

2007 ◽  
Vol 54 ◽  
pp. 296-300
Author(s):  
Takeshi KIMURA ◽  
Susumu NAKANO ◽  
Seiji AMOU ◽  
Takuma SHIRAKAWA
Keyword(s):  
Storm Surge ◽  
Tidal Flow
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