# A Study on the Influence of Suspended Matter by the Foundation Construction of Different Offshore Wind Turbines in the Taiwan Sea Area

^{1}

^{2}

^{3}

^{*}

## Abstract

**:**

## 1. Introduction

## 2. Methodology

#### 2.1. Hydrodynamic Model

^{2}); $U$ and $V$ represent the mean current velocity (m/s) of the water depth in the fixed coordinates of the $x$ and $y$ axes:

^{2}), which can be estimated using the method proposed by [8]:

#### 2.2. Wave Model

#### 2.3. Particle Tracking Model

## 3. Model Set-Up

#### 3.1. Modeling Procedure and Validation

#### 3.2. Suspended Load Characteristics at the Different Foundations

^{3}/h), and carried out continuous construction for analysis under the abovementioned working hours. The simulation results are shown in Figure 8. Take the wind turbine foundation as the center, and take the simulation results in four directions with a radius of 50 m. As this study is based on the assumption that dredging and rubble bed trimming were performed for 8 h and that the per foundation setting operation was completed in 2 h, the degree of influence on the tripile and jacket was larger than that on the monopile, and the influence time was longer. In Figure 8, the maximum value of the monopile is 0.012 kg/s, for the tripile, it is 0.018 kg/s, and for the jacket, it is 0.017 kg/s. The period of time to complete the construction of the maritime engineering was the time period with the highest concentration of suspended load. After that, because there was no source, the suspended load gradually spread, and the influence was gradually reduced. In addition, due to the influence of tidal currents on the sea, the suspended load also became more acceptable than the initial concentration.

## 4. Conclusions

## Author Contributions

## Funding

## Institutional Review Board Statement

## Informed Consent Statement

## Data Availability Statement

## Conflicts of Interest

## References

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**Figure 6.**Comparison between the data obtained using the numerical model and the measured ocean currents: (

**a**) tidal; (

**b**) current velocity; (

**c**) current direction.

**Figure 7.**Different foundation types: (

**a**) monopile; (

**b**) tripile; (

**c**) jacket. The offshore wind foundation type images are from [23].

Area | Grid Size | Number of Grid Points |

33 × 30 km | 50 × 50 m | 660 × 600 |

Coordinate of the origin (TWD67) | Angle of deviation (counterclockwise from the north) | Time step size |

147892, 2656583 | 25° | 1.5 s |

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**MDPI and ACS Style**

Hsiao, S.-S.; Wang, H.-Y.; Chiang, Y.-C. A Study on the Influence of Suspended Matter by the Foundation Construction of Different Offshore Wind Turbines in the Taiwan Sea Area. *Water* **2021**, *13*, 1405.
https://doi.org/10.3390/w13101405

**AMA Style**

Hsiao S-S, Wang H-Y, Chiang Y-C. A Study on the Influence of Suspended Matter by the Foundation Construction of Different Offshore Wind Turbines in the Taiwan Sea Area. *Water*. 2021; 13(10):1405.
https://doi.org/10.3390/w13101405

**Chicago/Turabian Style**

Hsiao, Sung-Shan, Hsing-Yu Wang, and Yun-Chih Chiang. 2021. "A Study on the Influence of Suspended Matter by the Foundation Construction of Different Offshore Wind Turbines in the Taiwan Sea Area" *Water* 13, no. 10: 1405.
https://doi.org/10.3390/w13101405