Yun-Chih Chiang

Tzu Chi University

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i-10 index

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Hsing-Yu Wang

National Kaohsiung University of Science and Technology

Sung‐Shan Hsiao

National Taiwan Ocean University

Hui‐Ming Fang

National Taiwan Ocean University

Ming‐Chung Lin

National Chung Shan Institute of Science and Technology

Ming-Chung Lin

Vanung University

Chao-Lung Ting

National Taiwan University

Yie-Ru Chiu

Tzu Chi University

Wang Hsing-Yu

National Kaohsiung University of Science and Technology

Huei‐Jeng Lin

National Taiwan University

Fang Hui-Ming

National Taiwan Ocean University

Cooperative Institutions

National Taiwan Ocean University

National Taiwan University

Tzu Chi University

National Kaohsiung University of Science and Technology

National Kaohsiung Marine University

National University of Kaohsiung

National Yang Ming Chiao Tung University

China National Administration of Coal Geology

East China University of Science and Technology

Huazhong University of Science and Technology

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

Water (2021)

Sung‐Shan Hsiao Hsing-Yu Wang Yun-Chih Chiang

The objective of this study was to adequately examine potential wave fields, flow fields, and suspended load changes in different wind turbine foundations. Accordingly, this study applied the hydrodynamic model to simulate waves, currents, and suspended load in the study area. The simulation results are 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 influence on the tripile and jacket was larger than that on the monopile, and the influence time was longer. However, due to the influence of tidal currents on the sea, the suspended load also became more acceptable than the initial concentration. From a macroscopic perspective, the different foundations did not sufficiently affect the study area. From a microscopic perspective, changes in the suspended load were only limited to areas surrounding the piles after the installation of the wind turbines.

Dredging

Foundation (evidence)

Rubble

Suspended load

Tidal current

10.3390/w13101405

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Citations (0)

Coastal Morphological Modeling

InTech eBooks (2011)

Yun-Chih Chiang Sung-Shang Hsiao

The three-dimensional models are used to predict the changes of bed level and bottom topography from spatial distributions of the sediment transport rates in cross-shore and longshore direction, which are estimated with the results of nearshore wave and current simulation.Compared with the shoreline models, the three-dimension models of coastal topography changes don't require more simplification and idealizations.On the other hand, the three-dimension models could be applied to analyze local coastal topography changes and therefore they have wider applicability, but a long computation time is required.However, the deficiencies of much computation time have be overcame with remarkable progress in computer techniques.Therefore, the three-dimension models of coastal topography changes could be applied with predicting local bed level changes in bottom topography over short-term and middle-term time interval.According to Horikawa (1986), Figure 1.1 indicates criteria of application ranges of coastal morphological evolution models in terms of time scales and spatial scales.The macromodels in the figure denote the more simplified empirical morphological analysis based on similar evolution trend experience and a lot of local survey data, and they are effective for a qualitative analysis but not applicability to quantitative analysis.

Beach morphodynamics

Coastal erosion

Sedimentary budget

Seabed

Coastal engineering

Longshore drift

Bedform

10.5772/22076

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Citations (7)

Numerical Simulations of Onshore Sandbar Development

The Twenty-second International Offshore and Polar Engineering Conference (2012)

Yun-Chih Chiang Ming‐Chung Lin Chao-Lung Ting Huei‐Jeng Lin C.‐Y. Hsu

Shoal

Source

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Citations (0)

Approaching Taiwan's coastal management problems from the perspective of Toucheng Beach's disappearance

Ocean & Coastal Management (2017)

Yun-Chih Chiang Hui‐Ming Fang Sung‐Shan Hsiao Hsing-Yu Wang

Coastal Management

Coastal erosion

10.1016/j.ocecoaman.2017.07.004

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Citations (7)

A Quasi-3D Sediment Transport Modelling For Coastal Morphodynamics

The Twenty-first International Offshore and Polar Engineering Conference (2011)

Yun-Chih Chiang Song-San Hsiao Ming‐Chung Lin

Beach morphodynamics

Source

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Citations (0)

Study on the Coexistence of Offshore Wind Farms and Cage Culture

Water (2021)

Hsing-Yu Wang Hui‐Ming Fang Yun-Chih Chiang

In this study, a hydrodynamic model was used that includes the effects of wave–current interactions to simulate the wave and current patterns before and after offshore wind turbine installation in western Taiwan. By simulating the waves and currents after the offshore wind turbine was established, the waves and currents caused by the wind turbine were seen to have a limited range of influence, which is probably within an area about four to five times the size of the diameter (12–15 m) of the foundation structure. Overall, the analysis of the simulation results of the wave and current patterns after the offshore wind turbines were established shows that the underwater foundation only affected the local area near the pile structure. The wind farm (code E) of the research case can be equipped with about 720 cage cultures; if this is extended to other wind farms in the western sea area, it should be possible to produce economic-scale farming operations such as offshore wind power and fisheries. However, this study did not consider the future operation of the entire offshore wind farm. If the operation and maintenance of offshore wind farms are not affected, and if the consent of the developer is obtained, it should be possible to use this method to provide economically large-scale farming areas as a mutually beneficial method for offshore wind power generation and fisheries.

Foundation (evidence)

10.3390/w13141960

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Designing Rainwater Harvesting Systems Cost-Effectively in a Urban Water-Energy Saving Scheme by Using a GIS-Simulation Based Design System

Water (2015)

Yie-Ru Chiu Yao‐Lung Tsai Yun-Chih Chiang

Current centralized urban water supply depends largely on energy consumption, creating critical water-energy challenge especially for many rapid growing Asian cities. In this context, harvesting rooftop rainwater for non-potable use has enormous potential to ease the worsening water-energy issue. For this, we propose a geographic information system (GIS)-simulation-based design system (GSBDS) to explore how rainwater harvesting systems (RWHSs) can be systematically and cost-effectively designed as an innovative water-energy conservation scheme on a city scale. This GSBDS integrated a rainfall data base, water balance model, spatial technologies, energy-saving investigation, and economic feasibility analysis based on a case study of eight communities in the Taipei metropolitan area, Taiwan. Addressing both the temporal and spatial variations in rainfall, the GSBDS enhanced the broad application of RWHS evaluations. The results indicate that the scheme is feasible based on the optimal design when both water and energy-savings are evaluated. RWHSs were observed to be cost-effective and facilitated 21.6% domestic water-use savings, and 138.6 (kWh/year-family) energy-savings. Furthermore, the cost of per unit-energy-saving is lower than that from solar PV systems in 85% of the RWHS settings. Hence, RWHSs not only enable water-savings, but are also an alternative renewable energy-saving approach that can address the water-energy dilemma caused by rapid urbanization.

Rainwater Harvesting

Water-energy nexus

10.3390/w7116285

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Citations (32)

Numerical Simulations of Sandbar Evolution by Tidal Current Effect

Yun-Chih Chiang Sung‐Shan Hsiao Hui‐Ming Fang Hsing-Yu Wang Ming‐Chung Lin

Shoal

Tidal current

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Citations (0)

Quasi-3D Modeling of Sediment Transport for Coastal Morphodynamics

InTech eBooks (2013)

Yun-Chih Chiang Sung‐Shan Hsiao

Sand transport plays a very important role in many aspects of coastal and marine engineering. The balance of moving sands influences the construction of harbours, coastal defence, offshore wind turbine and oil rig, offshore platform and pipeline and many other engineering. Coastal sands may be carried by currents (such as tidal currents, wind-driven-currents, wave-drivencurrents, storm surge driven currents), or by waves (monsoon waves or typhoon waves), or influenced by bedform changes, or all of them acting together and interacting in general sea state.

Beach morphodynamics

10.5772/54490

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Citations (1)

NUMERICAL SOLUTIONS OF COASTAL MORPHODYNAMIC EVOLUTION FOR COMPLEX TOPOGRAPHY

Journal of marine science and technology (2010)

Yun-Chih Chiang Hsiao Sung-Shan Ming-Chung Lin

Numerical modeling of coastal morphodynamic evolution is a powerful tool for the planning and design of coastal engineering. The coastal morphological modeling system is based on the sediment conservation law, which couples modules for waves, wave-driven currents, and sediment transport rates. The numerical scheme for the sediment conservation law and nonlinear coupling between these modules can lead to dispersions, diffusions, spurious oscillations and stability problems that are still not well developed. In this paper, the bedslope updating techniques, oscillation removal schemes, and 2-step, 3-time-level temporal discretization are employed to avoid oscillations and improve the stability of the coastal morphological model with accuracy up to 255 Ot x y (, , ) ∆∆∆ . Finally, the model shows good performance for coastal areas with complex topography.

Offshore geotechnical engineering

Spurious relationship

Oscillation (cell signaling)

Conservation law

10.51400/2709-6998.1878

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Citations (6)