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Coastal Engineering and Sustainability
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Coastal Engineering and Sustainability

A special issue of Sustainability (ISSN 2071-1050). This special issue belongs to the section "Energy Sustainability".

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 9338

Special Issue Editors

Prof. Dr. Ching-Piao Tsai

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Guest Editor
Department of Civil Engineering, National Chung Hsing University, Taichung City 402, Taiwan
Interests: coastal hydrodynamics; coastal engineering and environments; marine renewable energy; engineering applications of artificial intelligence
Special Issues, Collections and Topics in MDPI journals
Dr. Ray-Yeng Yang

E-Mail Website
Guest Editor
Department of Hydraulics and Ocean Engineering, National Cheng Kung University, Tainan City 701, Taiwan
Interests: ocean (coastal) engineering; ocean energy (wave and ocean current energy); ocean environment (internal wave and Langmuir circulation); hydrodynamic stability (double diffusion, salt finger convection); offshore structures (offshore wind energy and marine aquaculture cage nets); physical modeling
Special Issues, Collections and Topics in MDPI journals
Dr. Yun-Ta Wu

E-Mail Website
Guest Editor
Department of Hydraulics and Ocean Engineering, National Cheng Kung University, Tainan City 701, Taiwan
Interests: coastal and ocean engineering; computational fluid dynamics; experimental fluid mechanics

Special Issue Information

Dear Colleagues,

To assess and adapt the impact of climate changes on coastal areas is one of the severe challenges in the 21st century. Risk assessments of coastal flooding hazards should be carried out to identify the role of different hazard sources and to enhance coastal resilience. Since everything in the natural world is connected, existing coastal engineering may need to be revisited and incorporate the influence as well as the response of the ecosystem, so as to maintain and improve the quality of life from economic, environmental and social viewpoints. Increased demand for energy and water resources will bring new instabilities. Perspectives on renewable energy and water recycling innovations and technologies are indeed of great importance. Continuous growth in the populations of coastal regions along with climate change and the desire for key resources indicate the need to advance the utilization and management of coastal areas. In the direction of sustainable development, this Special Issue aims to collect the latest knowledge on “Coastal Engineering and Sustainability”, focusing on topics including, but not limited to the following:

  • Coastal engineering and ecosystems;
  • Coastal resilience;
  • Ecologically coastal engineering;
  • Innovative coastal engineering;
  • Integral coastal management and planning;
  • Marine renewable energy;
  • Coastal reservoirs;
  • Socioeconomic and environmental risks in coastal and ocean engineering;
  • Sustainable coastal environments;
  • Utilization of coastal areas.

Prof. Dr. Ching-Piao Tsai
Dr. Ray-Yeng Yang
Dr. Yun-Ta Wu
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Sustainability is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • coastal engineering
  • renewable energy
  • resilience
  • sustainability
  • water resources
  • climate change

Published Papers (3 papers)

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Research

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13 pages, 7098 KiB  
Article
An Experimental Investigation of Microbial-Induced Carbonate Precipitation on Mitigating Beach Erosion
by Ching-Piao Tsai, Jin-Hua Ye, Chun-Han Ko and You-Ren Lin
Sustainability 2022, 14(5), 2513; https://doi.org/10.3390/su14052513 - 22 Feb 2022
Cited by 7 | Viewed by 1961
Abstract
Microbial-induced calcium carbonate precipitation (MICP) has the potential to be an environmentally friendly technique alternative to traditional methods for sustainable coastal stabilization. This study used a non-pathogenic strain that exists in nature to experimentally investigate the application of the MICP technique on mitigating [...] Read more.
Microbial-induced calcium carbonate precipitation (MICP) has the potential to be an environmentally friendly technique alternative to traditional methods for sustainable coastal stabilization. This study used a non-pathogenic strain that exists in nature to experimentally investigate the application of the MICP technique on mitigating sandy beach erosion. First, the unconfined compressive strength (UCS) test was adopted to explore the consolidation performance of beach sand after the MICP treatment, and then model tests in a wave flume were conducted to investigate the MICP ability to mitigate beach erosion by plunger waves. This study also employed field emission scanning electron microscopy (FE-SEM) and energy-dispersive X-ray spectroscopy (EDS) to observe the crystal forms of MICP-treated sand after wave action. The results reveal that the natural beach sand could be consolidated by the MICP treatment, and the compressive strength increased with the increase in the cementation media concentration. In this study, the maximum compressive strength could be achieved was 517.3 kPa. The one-phase and two-phase MICP treatment strategies were compared of sandy beach erosion tests with various spray and injection methods on the beach surface. The research results indicate that the proper MICP treatment could mitigate beach erosion under various wave conditions; the use of MICP reduced beach erosion up to 33.9% of the maximum scour depth. Full article
(This article belongs to the Special Issue Coastal Engineering and Sustainability)
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22 pages, 12381 KiB  
Article
Study on Array Floating Platform for Wind Energy and Marine Space Optimization
by Yi-Hung Chen and Ray-Yeng Yang
Sustainability 2021, 13(24), 14014; https://doi.org/10.3390/su132414014 - 19 Dec 2021
Cited by 7 | Viewed by 3591
Abstract
The concept of multiline anchor, whose application is mainly considered in water depths beyond 100 m and analyzed only by numerical simulation, has been discussed for half a decade, yet previous studies have not conducted the wave basin experiment. Thus, this paper set [...] Read more.
The concept of multiline anchor, whose application is mainly considered in water depths beyond 100 m and analyzed only by numerical simulation, has been discussed for half a decade, yet previous studies have not conducted the wave basin experiment. Thus, this paper set this concept firstly with a shallow water mooring system designed for a Taiwan offshore water area, where the suitable water depth for floating offshore wind turbine is located from 50 to 100 m, and then conducted a 1:144 scaled model wave basin experiment to validate the results from numerical simulation. In this paper, the numerical model simulated and analyzed three identical DeepCwind OC4 semi-submersible platforms equipped with NREL 5MW wind turbines in OrcaFlex and the experiment carried out by using three 1:144 scaled semi-submersible platforms with equivalent disks which simulated different operations of wind thrusts. To consider the possible influence of the wake effect, the minimum turbines spacing was set at 750 m in a full scaled model and the length of mooring lines was redesigned according to the catenary theory. This paper utilized OrcaWave to calculate hydrodynamic parameters and input it into OrcaFlex to simulate the line tension and the three degrees of freedom (surge, heave, and pitch) of the platforms under regular and irregular wave tests, and coordinate with scaled model tests carried out in Tainan Hydraulics Laboratory (THL). In addition to the reduction in the number of anchors, the concept of multiline anchor was also discussed in this study for the spatial configuration of offshore wind farms. It shows that the wind farm composed of three floating wind turbines can reduce the ocean space by roughly 24% compared to that with a single-line anchor. According to the comparison of numerical and experimental results, this study finally optimized the mooring lines by changing the diameter to increase the stability and the threshold of Minimum Breaking Load (MBL) and proposed a multiline anchor configuration for shallow offshore water area in Taiwan based on the results obtained. Full article
(This article belongs to the Special Issue Coastal Engineering and Sustainability)
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Review

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11 pages, 953 KiB  
Review
Ecological Engineering and Restoration of Eroded Muddy Coasts in South East Asia: Knowledge Gaps and Recommendations
by Huynh Van Tien, Nguyen Tuan Anh, Nguyen Tan Phong and Mai Le Minh Nhut
Sustainability 2021, 13(3), 1248; https://doi.org/10.3390/su13031248 - 25 Jan 2021
Cited by 9 | Viewed by 2599
Abstract
Ecological engineering (EE) was employed for developing strategies for stabilizing eroded muddy coasts (EMCs). However, there was a limited analysis of these EE strategies with respect to design, performance, and lessons learned. This study employed a critical review for addressing the limitations. There [...] Read more.
Ecological engineering (EE) was employed for developing strategies for stabilizing eroded muddy coasts (EMCs). However, there was a limited analysis of these EE strategies with respect to design, performance, and lessons learned. This study employed a critical review for addressing the limitations. There were four EE models designed with different restoration interventions for stabilizing EMCs. The models using active interventions have not been cost-effective in controlling erosion because the interventions failed to achieve their goals or were costly and unnecessary. Of the two passive intervention models, the one with structures constructed from onshore proved to be more cost-effective in terms of construction costs, the survival rate of transplanted seedlings, and levels of sea mud accumulation. Interventions with adequate consideration of the muddy coastal ecological processes and the ecological reasoning for the positioning of these interventions play a crucial role in stabilizing EMCs. A passive restoration model using gradually expanded interventions should be promoted in order to ensure sustainable management of EMCs in the future. Full article
(This article belongs to the Special Issue Coastal Engineering and Sustainability)
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