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Summary of IOT Publications
| Title | Numerical modeling for wave, current and coastal evolution near offshore wind power (2/3) - Numerical modeling of sand drift statistics in the Taichung sea area |
|---|---|
| Dept | Transportation Technology Research Center |
| Year | 2019 |
| Month | 12 |
| Price | 200 |
| Summary | This study is the second-year portion of a three-year project (2018-2020) for numerical modeling of wave, current and coastal evolution near offshore wind power, primarily concentrating on numerical analysis of sand drift statistics in the Taichung sea area. When there are a large number of wind turbines installations at sea, this may cause wave and current fields to change, affecting sand drifting and topography change. This year, we conducted numerical studies on sand drifting in the outer seas of Taichung and Changhua, and compiled wind, wave, current and topography data to analyze the seasonal and typhoon characteristics of wind, waves and currents. We developed numerical modules for wind and hydrodynamics via unstructured grids; we also used observation data from different units to check the different positions of the numerical model. We completed simulation assessments, including the degree of impact on waves, currents and sand drifting, after establishment of offshore wind turbine generators in seventeen offshore wind farms. The simulation results have good correlation with the observation data. The simulation results show that after the establishment of offshore wind turbine generators, wave height, current velocity and sand drifting change in the local sea area. The overall wave height of the adjacent offshore wind farms is slightly reduced, and the current velocity increases or decreases slightly depending on the tidal water level change, but the amount of change is small. As for sand drifting occurring in the area of offshore wind farm sites and along the Taichung and Changhua coasts, erosion and silting conditions have appeared. Within the near-shore zone, sand drifting has been especially apparent in tidal land near Changhua, and at sea walls and harbor structures. The research results provide references for continuation of project planning, hydraulic model testing, maritime engineering planning, and topographic change analysis. |
| Post date | 2020-04-24 |
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