Article
Engineering, Marine
Muhammad Irham, Ichsan Rusydi, Haekal A. Haridhi, Ichsan Setiawan, Yopi Ilhamsyah, Anwar Deli, Muhammad Rusdi, Annisa Mardiah Siregar
Summary: The research aimed to assess the vulnerability of the west coast of Aceh Besar in Indonesia. Results showed that a significant portion of the coast is categorized as very high or high vulnerability, with specific sub-districts being particularly at risk. Areas with high vulnerability generally have sandy beaches with gentle slopes, while areas with low vulnerability have high elevations and cliff beaches.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Computer Science, Interdisciplinary Applications
Joshua A. Simmons, Kristen D. Splinter
Summary: This study used four different models to predict storm-driven coastal erosion and tested their skill and error distributions. The machine learning model showed the best overall skill, while the weighted ensemble approach performed well in predicting large events.
ENVIRONMENTAL MODELLING & SOFTWARE
(2022)
Article
Engineering, Marine
Pattrakorn Nidhinarangkoon, Sompratana Ritphring, Kanon Kino, Taikan Oki
Summary: This study was conducted in Phuket, which contributes 15% of the nation's GDP from tourism industry. Shoreline changes in beach areas were analyzed using the CoastSat open-source software and satellite imagery API. Future shoreline recession was projected based on field observation data and sea level rise scenarios. The study found mild erosion in eight locations from 2013 to 2021, with average shoreline change ranging from -4.10 to 5.47 m/year. The projection also indicated possible complete loss of 20 and 32 beaches under SSP1 2.6 and SSP5 8.5, respectively. Human activities such as coastal urbanization and development of structures along the coast were found to influence beach morphology. The study discusses the effectiveness of current coastal protection structures and proposes future management strategies.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Geosciences, Multidisciplinary
Olutoyin Adeola Fashae, Rotimi Oluseyi Obateru, Efosa Gbenga Adagbasa, Cindy Chekwubechukwu Emeh
Summary: This study aims to assess the situation, causes, and impacts of coastal erosion on selected communities in Lagos State, Nigeria. Through satellite image analysis and questionnaire surveys, it was found that there are significant differences in the extent and causes of coastal erosion in different regions, which have detrimental effects on the livelihoods and tourism industry of local communities. Moreover, these communities have a low resilience to coastal erosion, making them susceptible to the effects of climate change.
Review
Engineering, Marine
Noorashikin Md Noor, Khairul Nizam Abdul Maulud
Summary: This review highlights the impact of coastal vulnerability on the Southeast Asian region, emphasizing the challenges and threats faced by coastal areas, the importance of coastal management, and introducing methods for assessing coastal vulnerability and future directions for development.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Oceanography
Jay R. S. Doorga, Murughen Sadien, Nikhil A. Bheeroo, Olivier Pasnin, Oomarsing Gooroochurn, Khishma Modoosoodun-Nicolas, Vimal Ramchandur, Deepsheekha Ramharai
Summary: The rising sea level and increasing tropical storm frequency caused by climate change are threatening small Island economies that rely on their coastal environments and resources. Monitoring the evolution trends of shorelines is considered essential to improve the resilience of Island states due to the high socio-economic and environmental values of tropical sandy beaches.
OCEAN & COASTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Wan Shiao Dong, Effi Helmy Ariffin, Cherdvong Saengsupavanich, Muhammad Aizat Mohd Rashid, Mohamad Hakim Mohd Shukri, Muhammad Zahir Ramli, Mohd Fuad Miskon, Muhammad Hafeez Jeofry, Kamaruzzaman Yunus, Nor Hisham M. Ghazali, Md Nasir Md Noh
Summary: This study evaluates coastal erosion management strategies along the monsoon-dominated coastline of Terengganu, Malaysia by assessing the efficacy of coastal protection structures. The study finds that Terengganu is the most impacted region in Malaysia in terms of coastal erosion due to a higher frequency of storms and high wave energy during the northeast monsoon. The effectiveness of coastal defence structures is evaluated by analyzing historical shoreline positions using the Digital Shoreline Analysis System (DSAS).
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Engineering, Civil
Cary D. Troy, Yi-Ting Cheng, Yi-Chun Lin, Ayman Habib
Summary: The study used a UAV equipped with LiDAR to measure erosion on the shorelines of Lake Michigan, revealing extensive erosion and recession at Dune Acres and Beverly Shores beaches since the low water conditions of 2012-2013. The measurements from 2018-2019 show continued beach erosion and the transition of beach topography to actively eroding foredunes, indicating that erosion will persist in the foreseeable future while lake levels remain high.
COASTAL ENGINEERING
(2021)
Article
Environmental Sciences
Melissa Latella, Arjen Luijendijk, Antonio M. Moreno-Rodenas, Carlo Camporeale
Summary: Satellite imagery plays a crucial role in supporting sustainable management of land, water, and natural resources; Utilizing online platforms like Google Earth Engine enables users to efficiently process large satellite datasets; Validation of algorithms can accurately classify coastal land cover, providing essential information for studying ecological dynamics.
Article
Environmental Sciences
Hazem Usama Abdelhady, Cary David Troy, Ayman Habib, Raja Manish
Summary: This paper presents a new fully automated procedure for shoreline delineation from high-resolution multispectral satellite images. The model, based on the Direct Difference Water Index (DDWI), is able to accurately detect shoreline changes and obtain a time series. The model was validated using beach survey data and achieved a success rate of over 99%, outperforming other existing shoreline detection algorithms. The high spatial and temporal resolution of the shoreline position timeseries dataset sets a foundation for refining beach models worldwide.
Article
Environmental Sciences
Silvia Martin-Velazquez, Inmaculada Rodriguez-Santalla, Nikoletta Ropero-Szymanska, David Gomez-Ortiz, Tomas Martin-Crespo, Cristina de Ignacio-San Jose
Summary: The Hiendelaencina district in Spain was once a major silver producer in Europe, but after the mines closed, waste rock dumps and tailings ponds experienced erosion and dispersion. This study used historical mapping and LiDAR data to assess the degradation of these deposits and identified erosive landforms related to hydrological, wind, hydric-gravitational, and anthropic processes.
Article
Ecology
D. B. Angnuureng, K. E. Brempong, P. N. Jayson-Quashigah, O. A. Dada, S. G. I. Akuoko, J. Frimpomaa, P. A. Mattah, R. Almar
Summary: Regular monitoring of coastal areas is crucial for mitigating erosive disasters. The erosion along Ghana's coastline, like other countries in the Gulf of Guinea, is a persistent issue. This study used multiple data collection methods, including drones, cameras, satellite images, and a dumpy level, to assess shoreline changes in Elmina Bay, Ghana. The results identified the causes and areas of erosion at a fine scale and highlighted the effectiveness of local video cameras and drones for monitoring shoreline changes. Satellite imagery, although a potential alternative, has limitations in temporal resolution for detecting daily or event-based beach changes.
REGIONAL STUDIES IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Mauricio Villagran, Matias Gomez, Carolina Martinez
Summary: Sandy coastlines in Chile are currently experiencing strong erosion, but there is limited knowledge about the morphodynamics of these coastlines. Understanding the changes in coastlines and incorporating this knowledge into coastal management is important.
Article
Environmental Sciences
Kathryn E. L. Smith, Joseph F. Terrano, Jonathan L. Pitchford, Michael J. Archer
Summary: Shoreline change analysis is crucial for evaluating coastal exposure to erosion hazards, particularly for vulnerable habitats like coastal wetlands. The increasing availability of high-resolution satellite imagery and advancements in analysis techniques support the implementation of these data into shoreline monitoring, allowing for a wider spatial scale-range and cost reduction in labor-intensive practices.
Article
Multidisciplinary Sciences
Jerome Curoy, Raymond D. Ward, John Barlow, Cherith Moses, Kanchana Nakhapakorn
Summary: Approximately 11 million people, or 17% of the population, in Thailand live along the coast, facing issues such as coastal erosion, sea level rise, and land subsidence. Thailand has invested in restoration and protection efforts for coastal mangroves and beaches. This study utilized the Coastsat toolkit to digitize shoreline positions from satellite images taken between 1990 and 2019 along 560 km of coastline in Krabi and Nakhon Si Thammarat provinces. The analysis revealed varying rates of shoreline change, suggesting a linkage between extreme weather conditions and coastal erosion in Nakhon Si Thammarat, while the linkage was less clear in Krabi. The CoastSat tool provides crucial and accurate shoreline data for coastal managers and researchers, especially during travel restrictions caused by COVID-19.
Article
Oceanography
Celalettin Emre Ozdemir
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2016)
Article
Oceanography
Jinliang Liu, Jun-Hong Liang, Kehui Xu, Qin Chen, Celalettin Emre Ozdemir
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2019)
Article
Oceanography
Zhengchen Zang, Z. George Xue, Kehui Xu, Celalettin E. Ozdemir, Qin Chen, Samuel J. Bentley, Cihan Sahin
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2020)
Article
Mechanics
H. K. Jang, C. E. Ozdemir, J-H Liang, M. Tyagi
Summary: The study investigated the flow fields around a vertical wall-mounted cylinder under wave conditions, confirming the consistency between numerical simulations and analytical solutions. By presenting flow details and coherent structure dynamics, the study revealed the mechanistic view of bed shear and scour processes near the cylinder-wall junction.
Article
Mechanics
H. K. Jang, C. E. Ozdemir, J-H Liang, M. Tyagi
Summary: This study applies Dynamic Mode Decomposition (DMD) to investigate the oscillatory flow around a vertical wall-mounted cylinder, demonstrating its effectiveness in capturing dynamic and nonlinear flow features, and providing a basis for data-driven models relevant to coastal engineering applications.
Article
Engineering, Civil
Cody L. Johnson, Qin Chen, Celalettin E. Ozdemir, Kehui Xu, Robert McCall, Kees Nederhoff
Summary: This study explores the effects of land cover and limited sediment supply on low-lying barrier island morphology under storm conditions using physics-based numerical models. The simulation results indicate that a short-duration overwash regime dominates the morphological change in this low-lying barrier, influenced by backbarrier wetland deterioration. The morphological response to overwash is modulated by backbarrier land cover and topography, indicating that restoration of backbarrier wetlands in conjunction with beach renourishment may be an effective approach to increase the resiliency of low-lying barriers subject to frequent overwashing.
COASTAL ENGINEERING
(2021)
Article
Environmental Sciences
Xiao Yu, Celalettin E. Ozdemir, Minglan Yu, Zhengdong Yu
Summary: Categorizing roughness types and bottom friction parameterization is crucial in environmental flows. The contributions of different roughness types to total stress under oscillatory flows vary, with factors such as shape and ratio affecting the process.
ENVIRONMENTAL FLUID MECHANICS
(2021)
Article
Oceanography
S. Haddadian, C. E. Ozdemir, B. L. Goodlow, G. Xue, S. J. Bentley
Summary: This study investigates the velocity structure of ACSTCs through direct numerical simulations and provides parameterization relations. The results show that density stratification and drag coefficient are influenced by the product of sediment settling velocity and sediment concentration, affecting the amount of sediments carried by ACSTCs. The role of sediment-induced stable density stratification is analyzed to determine the velocity profile of ACSTCs.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Automation & Control Systems
Mohadese Movahednia, Amin Kargarian, Celalettin E. Ozdemir, Scott C. Hagen
Summary: This article presents a stochastic resource allocation approach for protecting power substations against flood events a day ahead of the event. The method uses flood probability distribution functions and historical data to estimate the failure probability, damage percentage, damage cost, and repair time of substations. A risk-aware approach is used to determine the optimal protection strategy for critical substations. The simulation results show the effectiveness of the proposed model.
IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS
(2022)
Article
Geosciences, Multidisciplinary
Celalettin E. Ozdemir, Liangyi Yue, Haq Murad Nazari, George Xue, Samuel J. Bentley, Shuo Yang, Sayed O. Hofioni, Robert Forney, Saber Aradpour
Summary: Wave- and current-supported turbidity currents (WCSTCs) are important sediment delivery mechanisms in the global cycles of particulate matter. This study investigates the critical conditions for the transformation of WCSTCs into self-driven turbidity currents and highlights the role of density stratification and sediment entrainment in the dynamics of WCSTCs. A depth-integrated advection model is developed and validated, providing insights into the regulation of suspended sediment load and the development of self-driven turbidity currents. The study also presents a quantitative relation for the critical conditions and analytically estimates the suspended sediment load.
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2023)
Article
Geography, Physical
A. Securo, C. Del Gobbo, L. Rettig, S. Pillon, A. De Luca, D. Fontana, E. Benedetti Fasil, R. R. Colucci
Summary: Small glaciers in temperate mountain regions have experienced significant reduction and unprecedented melt rates in recent years. Some glaciers have transitioned from clean ice to debris-covered or even rock glaciers. This study examines the surface elevation change of the Popera Alto glacier in the Sesto Dolomites using LiDAR and Structure from Motion surveys, and analyzes its evolution in terms of surface cover and geomorphic processes. The glacier has lost an average of 0.35 m water equivalent per year over the past 16 years, with active modification of its surface cover by geomorphic processes. The role of debris and local topography feedback has allowed the resilience of the glacier, leading to a marked difference between the current environmental equilibrium line altitude (envELA) and the effective ELA (effELA) of the glacier.
Article
Geography, Physical
Zhenzhen Yan, Yaolin Shi, Lili Kang, Xiangtao Fan
Summary: This study proposes a quantitative regional deformation model based on global positioning system (GPS) data to quantitatively analyze the morphological evolution of rivers in the Three Rivers Region. It finds that tectonic deformation phases significantly control regional landscape development and drainage features.
Article
Geography, Physical
Said Mukhtar Ahmad, Nitheshnirmal Sadhasivam, Mona Lisa, Luigi Lombardo, Mustafa Kemal Emil, Amira Zaki, Cees J. Van Westen, Islam Fadel, Hakan Tanyas
Summary: In this study, we investigated a large slow-moving landslide in Northern Pakistan, using Interferometric Synthetic Aperture Radar (InSAR) analysis. Our results showed that the crown of the landslide is moving faster than the surrounding regions, while the footslope experienced high deformations. We discussed the possible roles of meteorologic and anthropogenic factors in causing these deformations.
Article
Geography, Physical
Shuang Bian, Xibin Tan, Yiduo Liu, Suoya Fan, Junfeng Gong, Chao Zhou, Feng Shi, Michael A. Murphy
Summary: The Yarlung River's drainage divide is primarily moving north due to variations in precipitation across the Himalayas. The Gangdese drainage divide shows predominantly northward and southward migration, controlled by base-level rise and downstream influences. The presence of north-trending rifts separates the drainage divides into five zones, each with a distinct migration pattern.
Article
Geography, Physical
Joon-Young Park, Seok Yoon, Deuk-Hwan Lee, Seung-Rae Lee, Hwan-Hui Lim
Summary: This study developed a multiple-regression model to estimate site-specific average growth rates of debris flow events. The proposed model was validated through a case study and showed reasonable predictions of debris flow velocities and heights.
Article
Geography, Physical
Nicholas Reilly Mccarroll, Arnaud Temme
Summary: New geochronological data from hillslope boulder armor in the Flint Hills reveal the rates and timing of lateral retreat in the landscape. Surfaces of limestone boulders dating back to the Pleistocene era were found, and the ages of the hillslope armor increased with distance from the limestone bench. The estimated rate of lateral retreat in this landscape is 0.02 mm/yr.
Article
Geography, Physical
Xinbo Yao, Yuntao Tian
Summary: By studying the Longmenshan-Minshan drainage divide, we found that it has reached a dynamic steady state, indicating a balance between erosion and rock uplift. This study also reveals the process of formation and evolution of the divide and raises questions about the effectiveness of divide migration metrics.
Article
Geography, Physical
Junhui Yu, Pin Yan, Yanlin Wang, Guangjian Zhong, Changliang Chen
Summary: The seafloor mounds in the Chaoshan Depression of the South China Sea are identified as mud volcanoes, with fluids coming from underlying mud-fluid diapirs. The hydrocarbon gases feeding the mud volcanoes and diapirs are reasoned to originate from deep Mesozoic source rocks, indicating significant Mesozoic hydrocarbon potential in the Chaoshan Depression.
Article
Geography, Physical
Marius Huber, Luc Scholtes, Jerome Lave
Summary: This paper investigates the relationships between hillslope stability and fabric anisotropy of brittle rock materials and the implications for landscape shaping. It explores the different stability modes and movement characteristics of anisotropic materials, and demonstrates the significant control of material anisotropy on landscape shaping.
Article
Geography, Physical
Shubhra Sharma, Anil D. Shukla
Summary: The study investigates the relationship between glacial dynamics and lake sedimentation during the mid-Holocene climate variability in the Southern Zanskar ranges. It utilizes geomorphological disposition, elemental geochemistry, and optical chronology of relict lake sediment to reconstruct the pattern of minor glacier responses to climate variability. The results indicate six centennial to millennial-scale climatic phases, with warmer phases represented by decreased mineralogical fine grain flux and increased coarse grain flux. The study highlights the potential of relict lake sediment and para/peri-glacial landforms in understanding glacial dynamics and climate change during the Holocene.
Article
Geography, Physical
Jean-Francois Bernier, Sydney W. Meury, Patrick Lajeunesse
Summary: In this study, an approach combining various data and observation methods was proposed to improve the monitoring of landfast ice dynamics and its geomorphic impact on sedimentary systems. The results demonstrate the ability of the approach to accurately measure interannual variations in landfast ice and constrain geomorphic changes. Additionally, the study found a strong relationship between the severity of freezing seasons and the response of landfast ice to hydrometeorological events, with different geomorphic responses observed under different winter conditions.
Article
Geography, Physical
Heping Shu, Fanyu Zhang
Summary: This study investigates the relationship between susceptibility of soil-water hazards and human activities, geoheritage sites in the Loess Plateau, China. Landslide and gully erosion susceptibility were obtained using gradient boosting and support vector machines, and a hazard matrix was formed to couple landslide and gully erosion susceptibility. The study found different trends in the magnification times of soil-water hazards chain under different scenarios.
Article
Geography, Physical
Guangqiang Qian, Zhuanling Yang, Xuegang Xing, Zhibao Dong, Youyuan Guo
Summary: Granule ripples are aeolian landforms armored against erosion by coarse grains. This study investigates their seasonal morphological evolution and migration in the Sanlongsha Dune Field. The findings show that wind events, especially those exceeding the threshold velocities of coarse grains, significantly influence the morphodynamics of granule ripples. The study highlights the importance of considering the reptation and saltation of coarse grains in future research on granule ripples.