Academic literature on the topic 'Artificial reef monitoring'
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Journal articles on the topic "Artificial reef monitoring"
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Becker, Alistair, Matthew D. Taylor, and Michael B. Lowry. "Monitoring of reef associated and pelagic fish communities on Australia’s first purpose built offshore artificial reef." ICES Journal of Marine Science 74, no. 1 (August 4, 2016): 277–85. http://dx.doi.org/10.1093/icesjms/fsw133.
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Artificial reefs now form part of an integrated approach to enhance fisheries around the world. A responsible approach to artificial reef deployment calls for clear, well defined goals prior to any reef being placed in the field, followed by subsequent monitoring to assess whether these goals are being achieved. In this study, to evaluate if an artificial reef off Sydney was meeting its goal of providing quality fishing opportunities through the establishment of a complex fish assemblage, a 4-year monitoring program was designed. This program examined the response of reef-associated and pelagic fishes to the deployment of a purpose built offshore reef, relative to control reefs. Fish were observed immediately following deployment, but the artificial reef fish assemblage remained distinct from the three natural control reefs throughout the monitoring period. Also, the artificial reef displayed inter-annual variability associated with successional processes, which was not evident on the natural reefs. Fish length data indicated that the artificial reef was providing resources for both juvenile and adults of a number of species. This study demonstrates artificial reefs can provide habitats for a diverse group of fish, but the assemblages are unlikely to mimic those on natural reefs. We have also shown that longer term monitoring periods, covering multiple years are required to gain a robust understanding of the response of fish to reef deployment. This information can be used to understand the benefits and limitations of future artificial reef deployments.
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Dong, Zhipeng, Yanxiong Liu, Long Yang, Yikai Feng, Jisheng Ding, and Fengbiao Jiang. "Artificial Reef Detection Method for Multibeam Sonar Imagery Based on Convolutional Neural Networks." Remote Sensing 14, no. 18 (September 15, 2022): 4610. http://dx.doi.org/10.3390/rs14184610.
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Artificial reef detection in multibeam sonar images is an important measure for the monitoring and assessment of biological resources in marine ranching. With respect to how to accurately detect artificial reefs in multibeam sonar images, this paper proposes an artificial reef detection framework for multibeam sonar images based on convolutional neural networks (CNN). First, a large-scale multibeam sonar image artificial reef detection dataset, FIO-AR, was established and made public to promote the development of artificial multibeam sonar image artificial reef detection. Then, an artificial reef detection framework based on CNN was designed to detect the various artificial reefs in multibeam sonar images. Using the FIO-AR dataset, the proposed method is compared with some state-of-the-art artificial reef detection methods. The experimental results show that the proposed method can achieve an 86.86% F1-score and a 76.74% intersection-over-union (IOU) and outperform some state-of-the-art artificial reef detection methods.
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Ben-Tzvi, Ofer, Mohammad Al-Zibdah, Vladimir Bresler, Yousef Jamal, and Avigdor Abelson. "Coral Reef Monitoring: From Cytological Parameters to Community Indices." Journal of Marine Biology 2011 (2011): 1–11. http://dx.doi.org/10.1155/2011/151268.
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Sound-ecosystem-based management of coral reefs is largely based on indicators of reef health state. Currently there are various ecological parameters that serve as reef state indices; however, their practical implications are under debate. In the present study we examine an alternative parameter, the deterioration index (DI), which does not purport to replace the traditional indices but can provide a reliable, stand-alone indication of reef state. Patterns of cytological indices, which are considered as reliable indicators of environmental stressors, have been compared to ten selected reef community indices. The DI showed the highest correlations among community indices to the cytological indices in artificial reefs and high correlation in natural reefs as well. Our results suggest that in cases of lacking adequate monitoring abilities where a full set of community indices cannot be obtained, the DI can serve in many cases as the preferred, stand-alone indicator of coral reef state.
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Blount, Craig, Valeriya Komyakova, Lachlan Barnes, Marcus Lincoln Smith, Dilys Zhang, Kate Reeds, Daryl McPhee, Matthew D. Taylor, William Macbeth, and Evan Needham. "Using ecological evidence to refine approaches to deploying offshore artificial reefs for recreational fisheries." Bulletin of Marine Science 97, no. 4 (October 1, 2021): 665–98. http://dx.doi.org/10.5343/bms.2020.0059.
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Artificial reefs have many applications but are best known for their deployments to enhance recreational fisheries by creating new habitat in areas where natural reef is otherwise limited. The expectation is that fish assemblages will take up residence on artificial reefs and that these assemblages will become at least similar, if not more diverse and abundant, to those on natural reefs. Although designed, purpose-built artificial reefs are becoming more widely used in support of recreational fisheries and many of the historic issues have been resolved, conservation practitioners and managers still face challenges as to the type, number, and arrangement of structures and where to deploy them to maximize benefits and minimize risks. The ecological literature was reviewed to develop and enhance contemporary principles of artificial reef best practices for utilization. Our review identified optimal shapes, vertical relief, void spaces, and unit arrangements for increasing volumes and diversity of catch to recreational fishers and we provide a tool for identifying the least constrained areas for artificial reef deployment. We suggest; (a) monitoring of noncatch motivators in combination with quantitative indicators of the fishing activity (e.g., catch rate and effort) will provide the best understanding of success or failure of an artificial reef deployment; (b) choosing target species for informing purpose-built artificial reef designs to be reef-associated, demersal, philopatric, territorial, and obligatory reef species that are desired by local recreational fishers; and (c) considering the ecosystem services provided by artificial reefs beyond those associated with recreational fishing.
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Hukubun, Ronald Darlly, Frederik Rijoly, and Frijona F. Lokollo. "PENERAPAN TERUMBU BUATAN (Aritificial Reef) DI PERAIRAN DESA RUTONG DALAM UPAYA REHABILITASI EKOSISITEM TERUMBU KARANG DAN PENINGKATAN USAHA PENANGKAPAN." PAKEM : Jurnal Pengabdian Kepada Masyarakat 2, no. 2 (October 23, 2022): 83–89. http://dx.doi.org/10.30598/pakem.2.2.83-89.
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Application of artificial reefs in the waters of the Village Rutong is very well in supporting the rehabilitation of coral reefs that have been under pressure especially for reef fish resources. Methods used in these activities is the application of methods Ipteks Education through the delivery of material through the method of information about activities of the rehabilitation efforts of coral reef ecosystems to the target audience of the follow through artificial reef technology, and the training method is through the implementation of the manufacturing activities of coral artificial, haunted, and raft. Making the basic material of artificial reefs is a used car tires tied to form a triangle tires. Monitoring activities carried out 2 months after the splashdown in various types of fish that have used loopholes and surface car tires as well as a shelter looking for food. This continued to be held as ecological processes that will occur so that the initial function of artificial reefs that will serve as a fish nestt; and can be rehabilitated reef ecosystems that have been damaged will be realized
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Acarlı, Deniz, and Semih Kale. "Species-specific artificial reef models for lobster (Homarus gammarus Linnaeus 1758)." Ege Journal of Fisheries and Aquatic Sciences 37, no. 1 (March 15, 2020): 1–7. http://dx.doi.org/10.12714/egejfas.37.1.01.
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The objective of this study is to determine the possible artificial reef models preferred by lobster species (Homarus gammarus Linnaeus, 1758). For this purpose, eight artificial reef models at different shapes and sizes have been designed. These models include flat, grilled, U-type, cowl, fireplace chimney brick shapes made from the materials of wood, concrete and metal. Artificial reefs were deployed at 5, 10, 20 m water depths and 500 m from the shore on the coast of Erdek Ocaklar Bay in Marmara Sea. Then, monthly monitoring was conducted and SCUBA equipment were used during underwater monitoring. The time for deploying artificial reefs on the sea bottom (effort) was 233 minutes/diver and the time spent underwater by the divers was calculated as 540 minutes/diver. As a result of the study, 32 individuals of H. gammarus were observed in/around the artificial reefs. A significant increase was observed in the number of lobsters when the temperature dropped below 14°C. However, it was determined that lobster individuals preferred only concrete artificial reef models at the depth of 20 m. In addition, it was observed that small individuals preferred 40×80 cm flat concrete model (24 individuals) and large individuals preferred U-type concrete model (8 individuals). Therefore, it has been proposed to the usage of concrete artificial reef models in order to protect and ensure the sustainability of the reared lobster stocks and to release them into these artificial reefs while introducing them to the natural environments. In this context, this study will shed light on future studies.
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Puckeridge, AC, A. Becker, MD Taylor, MB Lowry, J. McLeod, HT Schilling, and IM Suthers. "Foraging behaviour and movements of an ambush predator reveal benthopelagic coupling on artificial reefs." Marine Ecology Progress Series 666 (May 20, 2021): 171–82. http://dx.doi.org/10.3354/meps13691.
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The behaviour of coastal fishes to new habitats and trophic opportunities provided by artificial reefs may reveal the key processes which sustain fish production at these reefs. We quantified the trophic link between benthic predators and pelagic forage fish from the movement and foraging behaviour of an ambush predator, the bluespotted flathead Platycephalus caeruleopunctatus, around an artificial reef in relation to schools of small pelagic fish. We used a network of acoustic receivers to monitor the fine-scale movements of 48 acoustically tagged flathead around 5 groups of artificial reef modules for 8 mo in conjunction with acoustic surveys of pelagic baitfish and sustained monitoring of current speed and direction. Flathead were highly associated with the artificial reef, with 44% of detections within 10 m of the modules. Flathead had a considerable degree of fidelity to the reef system, with an average residency period of 84 d yr-1 (residency index = 0.23, SD = 24 d). Low activity was recorded by accelerometers in the north-east of the artificial reef. This coincided with high densities of forage fish which were also found inside the stomachs of the flathead. Artificial reefs with high vertical relief allow planktivores to feed through more of the water column, fixing more pelagic biomass into the system. Defining the residency and trophic connectivity of fish at artificial reefs is critical to clarify the production-attraction debate and the sustainability of fishing at artificial reefs.
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UCHIDA, AKIRA. "8. Monitoring of artificial reef for seaweed." NIPPON SUISAN GAKKAISHI 85, no. 2 (March 15, 2019): 203. http://dx.doi.org/10.2331/suisan.wa2597-9.
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González-Rivero, Manuel, Oscar Beijbom, Alberto Rodriguez-Ramirez, Dominic E. P. Bryant, Anjani Ganase, Yeray Gonzalez-Marrero, Ana Herrera-Reveles, et al. "Monitoring of Coral Reefs Using Artificial Intelligence: A Feasible and Cost-Effective Approach." Remote Sensing 12, no. 3 (February 4, 2020): 489. http://dx.doi.org/10.3390/rs12030489.
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Ecosystem monitoring is central to effective management, where rapid reporting is essential to provide timely advice. While digital imagery has greatly improved the speed of underwater data collection for monitoring benthic communities, image analysis remains a bottleneck in reporting observations. In recent years, a rapid evolution of artificial intelligence in image recognition has been evident in its broad applications in modern society, offering new opportunities for increasing the capabilities of coral reef monitoring. Here, we evaluated the performance of Deep Learning Convolutional Neural Networks for automated image analysis, using a global coral reef monitoring dataset. The study demonstrates the advantages of automated image analysis for coral reef monitoring in terms of error and repeatability of benthic abundance estimations, as well as cost and benefit. We found unbiased and high agreement between expert and automated observations (97%). Repeated surveys and comparisons against existing monitoring programs also show that automated estimation of benthic composition is equally robust in detecting change and ensuring the continuity of existing monitoring data. Using this automated approach, data analysis and reporting can be accelerated by at least 200x and at a fraction of the cost (1%). Combining commonly used underwater imagery in monitoring with automated image annotation can dramatically improve how we measure and monitor coral reefs worldwide, particularly in terms of allocating limited resources, rapid reporting and data integration within and across management areas.
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Danendra, Ida Bagus Indra, I. Gusti Bagus Sila Dharma, and Elok Faiqoh. "Komposisi Jenis dan Keanekaragaman Ikan Karang pada 3 Jenis Bahan Terumbu Karang Buatan (Artificial reef) yang Berbeda (Beton, Ban Bekas, dan Besi) di Teluk Jemeluk Amed, Karangasem, Bali." Journal of Marine and Aquatic Sciences 7, no. 2 (December 1, 2021): 169. http://dx.doi.org/10.24843/jmas.2021.v07.i02.p05.
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Artificial reef at Jemeluk Bay, Karangasem, Bali is one of the area’s fisheries potential. Artificial reef is an underwater structure that is made for fishes’ protection and feeding ground. The purpose of this research is to know and understand types of reef fishes that surround the artificial reef, as well as the artificial reef’s affect onto the fish’s abundance at Jemeluk Bay. The method used for reef fish monitoring by visual census at artificial reef made from concrete, rubber tire and steel. This research is done towards six coral reef structures to get the reef fishes composition, which is made out of 7 fish families, 17 species, with an abundance total of 708 individuals. The highest fish abundance was founded at the 2nd rubber tire artificial reef with 6,4 individuals/m2, and the lowest fish abundance was found at the 1st concrete artificial reef with 3,28 individuals/m2. From the calculation at six of the artificial reef structures, the diversity index varies between 1,2 – 1,57, which is categorized as low diversity. The diversity value shows that steel artificial reef have the highest fish species diversity, however is still categorized as low.
Dissertations / Theses on the topic "Artificial reef monitoring"
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Robertson, Jamie. "Monitoring seabed change around the artificial reef: HMS Scylla in Whitsand Bay, Devon." Thesis, University of Plymouth, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.522112.
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Florisson, James. "Can recreational fishers provide an effective means of monitoring artificial reefs?" Thesis, Florisson, James (2015) Can recreational fishers provide an effective means of monitoring artificial reefs? Honours thesis, Murdoch University, 2015. https://researchrepository.murdoch.edu.au/id/eprint/29398/.
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Artificial reefs have been constructed and deployed globally to enhance the productivity of aquatic habitats. In April 2013, two artificial reefs were deployed in Geographe Bay, Western Australia for the purpose of enhancing recreational fishing opportunities. These reefs are designed to create varied complex spaces and habitats, as well as to create shallow water upwelling to drive nutrients up into the water column. The deployment of artificial reefs in Australia has recently become the subject of specific focus of policy makers and regulators. Monitoring costs to meet legislative requirements can be prohibitive, however, a potential method to reduce these costs is to utilise volunteers from the general public to collect data (i.e. citizen science). Thus, the overall objective of this project was to determine whether recreational fishers could potentially provide an effective means for monitoring artificial reefs.
A small number of recreational fishers were provided with underwater video cameras and asked to record footage of artificial reefs and nearby natural reefs. Unfortunately, only limited amounts of data were received due to the lack of participation, unseasonal weather and the short timeframe of the project. However, enough videos were received to undertake a preliminary analysis of the differences in the characteristics of the fish faunas of the two types of reef. The results demonstrated that artificial reefs had much higher levels of mean and maximum abundance, number of species and ecological group affinities. However, multivariate statistical analyses did not detect any differences between the fish faunal compositions between artificial and natural reefs. This was due to the dominance of the labrid Coris auricularis and the large amount of variability between replicates.
Given the limited data provided by the above citizen science program, a literature review on other similar projects to evaluate the effectiveness of the citizen science components of the pilot project was completed and provided a set of key recommendations. These included enhancing the methods of contacting and recruiting volunteers, providing simplified and consistent instructions and consistent communication and engagement with volunteers.
Finally, Baited Remote Underwater Video (BRUV) systems, constructed from readily available materials, were deployed randomly around the Busselton artificial reef to test the applicability of this method for future use as a citizen science artificial reef monitoring tool. The video footage was analysed to determine whether there was a difference in fish assemblages between artificial reef modules and the surrounding area, i.e. videos observing areas in which artificial reef modules were, and were not, observed in the camera’s field of view. The results demonstrated that mean number of species and the number of benthic and epibenthic species were greater on footage recorded when the camera faced the modules. There was also a difference in the faunal composition. The footage observing artificial reef modules also exhibited 52.63% more recreational target species than surrounding areas. It was concluded that the BRUV technology employed here could be used, by citizen scientists, to monitor the fish faunas of artificial reefs. However, as this study has also demonstrated that there were significant differences in the characteristics of the fish faunas recorded depending on the direction the camera was facing, consideration is needed to design an unbiased and robust quantitative monitoring regime.
It is concluded that recreational fishers did not provide an effective means for monitoring artificial reefs during this project. This result, however, is a consequence of a lack of data stemming from an absence of volunteer engagement in a limited pilot project with a short time frame and unseasonal weather. This does not exclude the potential for using citizen scientists to monitor artificial reefs, following some changes in the methodology, technology and management of citizen science protocols, and thus it is possible to utilise recreational fishers as an effective means for monitoring artificial reefs. This project was subjected to restrictive and limiting factors but more importantly, discovered ways to overcome these issues by provided key recommendations on technology, methodologies and community engagement that should be followed to increase the effectiveness of using recreational fishers to provide sound scientific information in the future.
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Bateman, Thomas. "Artificial Reefs: Types, applications, trends in deployment and the development of a cost-effective method for monitoring their fish faunas." Thesis, Bateman, Thomas (2015) Artificial Reefs: Types, applications, trends in deployment and the development of a cost-effective method for monitoring their fish faunas. Honours thesis, Murdoch University, 2015. https://researchrepository.murdoch.edu.au/id/eprint/29645/.
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The focus of this thesis is on the design and use of artificial reefs and the development of a cost-effective method for monitoring their fish faunas. A review of habitat enhancement structures around the world, focusing primarily on artificial reefs, found that these structures have been used for a wide range of purposes such as sediment stabilization, mitigation of illegal trawling, enhancing recreational fisheries and the provision of additional habitat and nurseries for threatened fish stocks. Over time, there has been a growing trend in the use of purpose built reef modules as opposed to the use of materials of opportunity. Within Australia this has been most evident in the shift away from the use of tyres and steel vessels, to the use of specially designed concrete reef modules. As these structures can require financial investments within the millions, it is important to evaluate their effectiveness through post deployment monitoring. A central part of the citizen science monitoring project being developed by Recfishwest in Western Australia is the use of university students to extract information from the Baited Remote Underwater Video (BRUV) footage collected by recreational fishers. This study found that whilst observers recorded similar numbers of species and abundance (total MaxN), significant differences were present between observers in terms of their faunal compositions. This indicates that if inexperienced observers are used in the future as part of a cost-effective monitoring project, observer bias may be a potential source of error in the data and should be mitigated through observer training. Statistical analysis of footage collected from the Bunbury and Dunsborough artificial reefs using BRUVs found a significant difference in species composition between the footage from the two reefs but not between camera positions. However, increased camera soak time and footage collection over a greater temporal scale are needed to increase the reliability of the data. Whilst improvements to the sampling regime are recommended, the use of cost-effective BRUVs shows potential as an effective method for monitoring the fish fauna of artificial reefs using citizen science.
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Scarfe, Bradley Edward. "Oceanographic Considerations for the Management and Protection of Surfing Breaks." The University of Waikato, 2008. http://hdl.handle.net/10289/2668.
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Although the physical characteristics of surfing breaks are well described in the literature, there is little specific research on surfing and coastal management. Such research is required because coastal engineering has had significant impacts to surfing breaks, both positive and negative. Strategic planning and environmental impact assessment methods, a central tenet of integrated coastal zone management (ICZM), are recommended by this thesis to maximise surfing amenities. The research reported here identifies key oceanographic considerations required for ICZM around surfing breaks including: surfing wave parameters; surfing break components; relationship between surfer skill, surfing manoeuvre type and wave parameters; wind effects on waves; currents; geomorphic surfing break categorisation; beach-state and morphology; and offshore wave transformations. Key coastal activities that can have impacts to surfing breaks are identified. Environmental data types to consider during coastal studies around surfing breaks are presented and geographic information systems (GIS) are used to manage and interpret such information. To monitor surfing breaks, a shallow water multibeam echo sounding system was utilised and a RTK GPS water level correction and hydrographic GIS methodology developed. Including surfing in coastal management requires coastal engineering solutions that incorporate surfing. As an example, the efficacy of the artificial surfing reef (ASR) at Mount Maunganui, New Zealand, was evaluated. GIS, multibeam echo soundings, oceanographic measurements, photography, and wave modelling were all applied to monitor sea floor morphology around the reef. Results showed that the beach-state has more cellular circulation since the reef was installed, and a groin effect on the offshore bar was caused by the structure within the monitoring period, trapping sediment updrift and eroding sediment downdrift. No identifiable shoreline salient was observed. Landward of the reef, a scour hole ~3 times the surface area of the reef has formed. The current literature on ASRs has primarily focused on reef shape and its role in creating surfing waves. However, this study suggests that impacts to the offshore bar, beach-state, scour hole and surf zone hydrodynamics should all be included in future surfing reef designs. More real world reef studies, including ongoing monitoring of existing surfing reefs are required to validate theoretical concepts in the published literature.
Books on the topic "Artificial reef monitoring"
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Bernthal, Thomas W. Using Landsat 7 imagery to map invasive reed canary grass (Phalaris arundinacea): A landscape level wetland monitoring methodology : final report to U.S. EPA - Region V. Edited by Willis Kevin G, Watermolen Dreux J, United States. Environmental Protection Agency. Region V., and Wisconsin. Bureau of Integrated Science Services. Madison, WI: Wisconsin Dept. of Natural Resources, Bureau of Integrated Science Services, 2004.
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Becken, Susanne, Noel Scott, Rod Connolly, Bela Stantic, and Ranju Mandal. Monitoring Aesthetic Value of the Great Barrier Reef by Using Innovative Technologies and Artificial Intelligence. Griffith University, 2018.
Find full textBook chapters on the topic "Artificial reef monitoring"
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Bodilis, P., E. Dombrowski, C. Seytre, and P. Francour. "Monitoring of the Artificial Reef Fish Assemblages of the Marine Protected Areas Along the Alpes-Maritimes Coast (France, North-Western Mediterranean)." In Global Change: Mankind-Marine Environment Interactions, 55–59. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-90-481-8630-3_10.
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Charbonnel, E., and F. Bachet. "Artificial Reefs in the Cote Bleue Marine Park: Assessment After 25 Years of Experiments and Scientific Monitoring." In Global Change: Mankind-Marine Environment Interactions, 73–79. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-90-481-8630-3_13.
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Isdianto, Andik, Oktiyas Muzaky Luthfi, Muhammad Arif Asadi, Muchamad Fairuz Haykal, Berlania Mahardika Putri, Candra Adi Intyas, Mochammad Fattah, Pudji Purwanti, and Edi Susilo. "Human Resources in an Artificial Reef Deployment." In Impact of Artificial Reefs on the Environment and Communities, 169–94. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-6684-2344-8.ch009.
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Artificial reefs are structures that can be natural or artificial materials that are intentionally placed on the seabed, placed at one time or over a long period of time, and ideally will work as part of a natural ecosystem. In artificial reefs deployment, it is necessary to pay attention to several factors so that the artificial reef itself functions optimally. Therefore, competent human resources are needed through the correct technical understanding of artificial reef deployment. The less-than-optimal deployment of artificial reefs in Damas waters is caused by a lack of understanding of human resources, so that when monitoring was carried out, it was found that 22 of the 25 artificial reefs found were mostly in poor condition.
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"Marine Artificial Reef Research and Development: Integrating Fisheries Management Objectives." In Marine Artificial Reef Research and Development: Integrating Fisheries Management Objectives, edited by Tiffanie A. Cross, Beverly Sauls, Rachel Germeroth, and Keith Mille. American Fisheries Society, 2018. http://dx.doi.org/10.47886/9781934874516.ch16.
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<em>Abstract</em>.—Florida boasts an abundance of natural and artificial reefs that support a large and diverse recreational fishery off the Gulf of Mexico coast. Recent efforts to mitigate the effects of the <em>Deepwater Horizon </em>oil spill have increased the number of artificial reefs deployed off Florida’s Gulf Coast. Fisheries-dependent data are needed to assess whether artificial reef programs are meeting intended objectives and to understand changes in recreational angler behavior, which may influence catch per unit effort and biomass of landed fish. The objective of this study was to quantify the use of artificial reefs by recreational anglers targeting reef fishes in the Gulf of Mexico off the west coast of Florida. We utilized an existing survey designed to monitor recreational fishing effort by anglers that target reef fishes from private boats. Over a 20-month period, an estimated total of 776,026 (SD ±27,540) angler trips targeted reef fishes off the Gulf Coast of Florida, of which 46% utilized artificial reefs. Approximately two-thirds of all reef angling trips took place nearshore in state-managed waters, and 70% of trips that utilized artificial reefs occurred in this area. Regionally, the highest proportion of angler trips targeting reef-associated species on artificial reefs took place in the panhandle of Florida, where Red Snapper <em>Lutjanus campechanus </em>are most abundant. Seasonally, state and federal fishing regulations also had an apparent influence on fishing effort and artificial reef use by recreational anglers. The method of assessment we present here could be useful for monitoring future trends in recreational fishing effort with respect to artificial reefs.
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"Marine Artificial Reef Research and Development: Integrating Fisheries Management Objectives." In Marine Artificial Reef Research and Development: Integrating Fisheries Management Objectives, edited by Sean F. Keenan, Theodore S. Switzer, Kevin A. Thompson, Amanda J. Tyler-Jedlund, and Anthony R. Knapp. American Fisheries Society, 2018. http://dx.doi.org/10.47886/9781934874516.ch9.
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<em>Abstract</em>.—Reef-fish assemblage structure was compared among multiple artificial and geologic (i.e., naturally occurring hard bottom) habitats in the northeastern Gulf of Mexico during 2014–2016 as part of a larger fishery-independent survey. Baited remote underwater video systems equipped with stereo cameras were deployed (<em>n </em>= 348) on 11 habitat types, classified through interpretation of side-scan sonar imagery. In the video samples, 11,801 fish were enumerated. Nonparametric analysis of reef-fish assemblages detected four clusters related to habitat; assemblages associated with geologic habitats were distinct, whereas the remaining three clusters represented groupings of artificial habitats of different size, scale, and complexity. While many species, including Vermilion Snapper <em>Rhomboplites aurorubens </em>and Red Snapper <em>Lutjanus campechanus</em>, were observed in greater numbers on artificial reef habitats, most species were observed in all habitats sampled. Among artificial reef habitats, the habitat cluster consisting of unidentified depressions, unidentified artificial reefs, construction materials, and reef modules was similar to geologic habitats in supporting larger individuals, specifically Gray Triggerfish <em>Balistes capriscus </em>and Red Snapper. In contrast, the habitat cluster consisting of smaller, generally solitary chicken-transport cages was inhabited by smaller individuals, including smaller Red Snapper. Although geologic reefs are the predominant reef habitat throughout much of the eastern Gulf, artificial reefs are important locally, especially in the Florida Panhandle. Accordingly, continued incorporation of artificial reef habitats within large-scale fishery-independent monitoring efforts is critical to the accurate assessment of the status of reef-fish stocks on broad spatial scales.
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"Marine Artificial Reef Research and Development: Integrating Fisheries Management Objectives." In Marine Artificial Reef Research and Development: Integrating Fisheries Management Objectives, edited by Daniel J. Pondella, Jonathan P. Williams, Chelsea M. Williams, Jeremy T. Claisse, and David Witting. American Fisheries Society, 2018. http://dx.doi.org/10.47886/9781934874516.ch10.
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<em>Abstract</em>.—The subtidal rocky reefs that surround the Palos Verdes Peninsula in Los Angeles County, California, USA are subject to multiple anthropogenic impacts, including many (at least partially) human-induced landslides over the past half century, which have resulted in chronic sedimentation (e.g., reef burial and scour) and associated turbidity effects along a major stretch of this coastline. The amount of rocky reef habitat has significantly decreased; as such, determining the optimum technique for restoring this lost habitat is the focus of this study. Over the past decade, we mapped and intensively surveyed the nearshore physical and biological characteristics both inside this impacted area and in surrounding reference areas that contain extensive rocky reef habitat with established kelp forests. Notable among all survey locations is a relatively high-relief (~5 m) area of reef within the sediment impacted area that consistently has the highest fish biomass density among anywhere on the peninsula. The high structural relief prevents sediment accumulation, scour, and subsequent reef burial, and this reef ultimately served as the example for the design of sets of quarry rock reef “blocks” that together form the proposed restoration reef. Our primary objective was to use the 63,500 metric tons of quarry rock the budget would allow us to create the most productive habitat by restoring the natural reef environment while balancing scientific study design considerations (i.e., replicated reef components at multiple spatial scales) with maximizing the potential for an effective restoration effort across the range of important species and overall kelp forest biodiversity. To meet this objective, we considered multiple criteria that incorporated engineering specifications and biological performance and were informed by the scientific literature and results of natural and artificial reef surveys in this region. Ultimately, the design incorporated heterogeneity at multiple spatial scales while attempting to maximize high relief components, surface area to volume ratio, perimeter, ecotones, and small-scale current flow features and nutrient flux and while being consistent with the size of natural reefs along the Palos Verdes Peninsula. Further, placement and spacing of individual reef blocks (i.e., 2 × 48 m heterogeneous quarry rock reefs) included space for sand channels between blocks to permit sediment transport and create sand/rock ecotone habitats while remaining close enough to each other and existing natural reefs to maintain biological connectivity. Reef blocks were also located at the depth (15–20 m) where the most productive reef habitat in the region was observed. Finally, we discuss a proposed pre- and post-construction monitoring program and additional studies that could be performed that would leverage the replicated elements in the restoration reef design to inform future reef restoration programs.
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Lök, Altan, Aytaç Özgül, and Vahdet Ünal. "An Overview of the First National Artificial Reef Project of Turkey." In Impact of Artificial Reefs on the Environment and Communities, 110–25. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-6684-2344-8.ch006.
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Although artificial reef applications in Turkey started in the 1980s, the acceptance of its use as a tool in fisheries management ended in the 2000s. The first legal regulation on artificial reefs entered into force in 2001, and the National Artificial Reef Program (NARP) was prepared in 2009. The program was aimed to have two main purposes: (1) create new fishing grounds to promote small-scale fisheries and (2) conserve biodiversity in the littoral zone. The first pilot project within the framework of the NARP was completed in February 2013 in Edremit Bay. With the completion of the deployment of the ARs, a 5-year monitoring program was initiated. In this chapter, the historical development of AR studies in Turkey, the NARP, and the evaluation of the first project within the framework of the program are discussed.
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"Marine Artificial Reef Research and Development: Integrating Fisheries Management Objectives." In Marine Artificial Reef Research and Development: Integrating Fisheries Management Objectives, edited by Robert M. Martore and Melvin Bell. American Fisheries Society, 2018. http://dx.doi.org/10.47886/9781934874516.ch11.
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<em>Abstract</em>.—In support of the Magnuson–Stevens Conservation and Management Reauthorization Act of 2006, which tasked regional fisheries management councils with ending overfishing of numerous marine finfish species, the South Atlantic Fisheries Management Council established 8 deepwater (90–150 m [300–500 ft]) type II marine protected areas (MPAs) along the coastline of the southeastern United States. At the request of the South Carolina Department of Natural Resources (SCDNR), one of these MPAs was established on an undeveloped sand-bottom area previously permitted by SCDNR for artificial reef development. After monitoring the production potential of unfished artificial reefs for several years on shallower experimental reef sites, SCDNR staff proposed that a deeper location had the potential to become a highly productive spawning site, particularly for deepwater grouper species. Development of this permitted site began in 2014 when two 79-m (260 ft) barges with nearly 30 m (100 ft) of added profile were deployed. Subsequent monitoring of the site through remotely operated underwater vehicle video revealed colonization by several target species, including Warsaw Grouper <em>Hyporthodus nigritus</em>, Snowy Grouper <em>H. niveatus</em>, and Misty Grouper <em>H. mystacinus</em>. Due in part to the success of this deepwater MPA, the SCDNR was also granted spawning special management zone designation for its two previously established, undisclosed experimental artificial reef sites in federal waters off South Carolina in 2017.
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Isomura, Naoko. "Coral Reef Ecosystems in Marine Environments." In Monitoring Artificial Materials and Microbes in Marine Ecosystems: Interactions and Assessment Methods, 1–10. BENTHAM SCIENCE PUBLISHERS, 2020. http://dx.doi.org/10.2174/9789811437250120020003.
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"Marine Artificial Reef Research and Development: Integrating Fisheries Management Objectives." In Marine Artificial Reef Research and Development: Integrating Fisheries Management Objectives, edited by Stephen C. Schroeter, Daniel C. Reed, and Peter Raimondi. American Fisheries Society, 2018. http://dx.doi.org/10.47886/9781934874516.ch12.
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<em>Abstract</em>.—The Wheeler North Reef (WNR) is a large (70.4 ha [174 acre]) artificial reef in Southern California designed to mitigate the loss of kelp forest habitat and its associated community of algae, invertebrates, and fishes caused by the operation of the San Onofre Nuclear Generating Station (SONGS). Conditions of the SONGS’ operating permit require that the success of WNR in compensating for the kelp forest resources destroyed by the 30 years of the power plant’s operations be determined by long-term monitoring that is independent of the owners of SONGS. Performance standards pertaining to physical and ecological attributes of WNR are used as a basis for determining the success of WNR in meeting the mitigation objective to replace kelp forest resources in kind. We discuss details of the sampling design, evaluation criteria, and monitoring results and show how they are used to inform adaptive management that helps to ensure that the mitigation goals are met.
Conference papers on the topic "Artificial reef monitoring"
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Barger, N. "Yukon artificial reef monitoring project. Data collection using volunteer research divers." In Oceans 2003. Celebrating the Past ... Teaming Toward the Future (IEEE Cat. No.03CH37492). IEEE, 2003. http://dx.doi.org/10.1109/oceans.2003.178422.
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Yamamoto, Ikuo, Akihiro Morinaga, and Murray Lawn. "Research on Underwater Vehicle for Monitoring of Offshore Wind Generation Systems." In ASME 2019 2nd International Offshore Wind Technical Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/iowtc2019-7506.
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Abstract A compact low cost lightweight ROV (Remotely operated underwater vehicle) has been developed to assist in the monitoring of offshore wind generation systems. The ROV successfully dove 76 meters to check the condition of the spa to the base and associated moorings of a floating offshore wind generator (Goto, Nagasaki, Japan). An abundance of sea life was also observed around the base as the base provides a kind of artificial reef which fosters a marine ecosystem. The design philosophy of this ROV and overall system are described in this paper including the proposed addition of robotic arms.
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Niedzwiedz, Gerd. "Underwater Long-Term Observation at the Largest German Artificial Reef in the Baltic Sea." In 25th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/omae2006-92203.
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The Baltic Sea is one of the most frequented regions in the world. The Baltic neighbouring states more and more see the need to adapt their economic interests to the given ecological conditions. This can not always be done sufficiently, which can be seen at the example of coastal fishery in some of these countries. Owing to the critical condition of economically important fish stocks, selective fishing and fish-stock saving measures have become main fields of research. Supported by the European Union and by the federal state government we have tried in Mecklenburg-Vorpommern during the last four years to investigate the effects of an artificial Baltic reef with respect to fishing. For this purpose more than 1300 reef elements — made of a special sort of concrete and having different shapes and size — have been arranged on an area of 200 × 200 m at a water depth of 12 m about 1.5 m away from the coast. Over a period of almost four years different methods and techniques have been applied to observe and record the effects of these structures on the natural environment in a long-term investigation. Continuous video-optical underwater observation using up to nine simultaneously controlled underwater cameras proved to be a special technical challenge. Important results have been gained from a monitoring with research divers and from a defined test and comparison fishing done once every month. Various fishing methods have been applied — also those which are normally not common in that region. A special low-cost variant of a remote controlled underwater stereo photo camera has been developed and built in order to get biometric data of the fish without catching it.
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Maslov, Dmytro, Eduardo Pereira, Tiago Miranda, Maria Valente, Fabio Cruz, and Marisa Pinheiro. "Innovative monitoring strategies for multifunctional artificial reefs." In OCEANS 2018 MTS/IEEE Charleston. IEEE, 2018. http://dx.doi.org/10.1109/oceans.2018.8604656.
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Elkafrawy, Sameh, Sameh Elkafrawy, Akram Soliman, Akram Soliman, Mohamed Bek, and Mohamed Bek. "EVALUATING SHORELINE, URBAN AND ROADS CHANGES IN THE HURGHADA AREA, EGYPT, USING MULTISPECTRAL SATELLITE IMAGES." In Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.31519/conferencearticle_5b1b9422c50d28.22324330.
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The rapid urban development in the Hurghada area since the 1980s has dramatically enhanced the potential impact of human activities. To inventory and monitor this urban development effectively, remote sensing provides a viable source of data from which updated land cover information can be extracted efficiently and cheaply. In this study, data from three satellite datasets, Landsat Thematic Mapper (Landsat 5 TM), Landsat Enhanced Thematic Mapper Plus (Landsat 7 ETM+) and Terra/Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), acquired during 1987, 2000 and 2005, respectively, were used to detect and evaluate Hurghada's urban expansion. Five change detection techniques were tested to detect areas of change. The techniques considered were image differencing, image ratioing, image overlay, multidate principal component analysis (PCA) and post-classification comparison. The post-classification comparison was found to be the most accurate procedure and produced three land use/land cover (LULC) maps of the years 1987, 2000 and 2005 with overall accuracies of 87.8%, 88.9% and 92.0%, respectively. The urban expansion analysis revealed that the built-up area has expanded by 40 km2 in 18 years (1987–2005). In addition, 4.5 km2 of landfill/sedimentation was added to the sea as a result of the coastal urban development and tourist activities. The booming coastal tourism and population pressure were considered to be the main factors driving this expansion, and some natural and artificial constraints constrained the physical shape of the city. The expansion is represented by urban fringe development, linear, infill and isolated models. Topography, lithology and structures were also analysed as possible factors that influenced the expansion. The understanding of the spatial and temporal dynamics of Hurghada's urban expansion is the cornerstone for formulating a view about the future urban uses and for making the best use of the limited resources that are available [1]. A Landsat 5 Thematic Mapper (TM) image of 1987 and a Landsat 7 Enhanced Thematic Mapper Plus (ETM+) image of 2000 were used to examine changes in land use/land cover (LULC) around Hurghada, Egypt, and changes in the composition of coral reefs offshore. Prior to coral reef bottom type classification, the radiance values were transformed to depth invariant bottom indices to reduce the effect of the water column. Subsequently, a multi component change detection procedure was applied to these indices to define changes. Preliminary results showed significant changes in LULC during the period 1987–2000 as well as changes in coral reef composition. Direct impacts along the coastline were clearly shown, but it was more difficult to link offshore changes in coral reef composition to indirect impacts of the changing LULC. Further research is needed to explore the effects of the different image processing steps, and to discover possible links between indirect impacts of LULC changes and changes in the coral reef composition [2]. Knowledge and detecting impacts of human activities on the coastal ecosystem is an essential management requirement and also very important for future and proper planning of coastal areas. Moreover, documentation of these impacts can help in increasing public awareness about side effects of unsustainable practices. Analysis of multidate remote sensing data can be used as an effective tool in environmental impact assessment (EIA). Being synoptic and frequent in coverage, multidate data from Landsat and other satellites provide a reference record and bird’s eye viewing to the environmental situation of the coastal ecosystem and the associated habitats. Furthermore, integration of satellite data with field observations and background information can help in decision if a certain activity has caused deterioration to a specific habitat or not. The present paper is an attempt to utilize remote sensing data for assessment impacts of some human activities on the major sensitive habitats of the north western Egyptian Red Sea coastal zone, definitely between Ras Gemsha and Safaga. Through multidate change analysis of Landsat data (TM & ETM+ sensors), it was possible to depict some of the human infringements in the area and to provide, in some cases, exclusive evidences for the damaging effect of some developmental activities [3]. The coastline of Hurghada has experienced considerable environmental stress from tourist and residential recreational activities. Uncontrolled tourist development has already caused substantial damage to inshore reefs and imbalance in the hydrodynamic pattern of the coastal sediments. The objective of this paper is to investigate environmental changes using multitemporal, multispectral satellite data to identify changes at Hurghada caused by anthropogenic influences. Major detected changes include resort beaches, protection structures and landfill areas; these changes are mainly due to human intervention. Two Landsat Thematic Mapper (TM) images acquired in 1984 and 1997 are used for this analysis. The landfill areas formed during this period are calculated at about 2.15 Km2 . Whilst landfill creates new inexpensive land and improves access to the sea for tourists, it is the cause of environmental problems. In addition, land-use/land-cover and beach changes are determined over the 13-year period [4]. The Red Sea coastal zone is characterized by its sensitive, fragile, unique natural resources and habitats. In the Hurghada coastal region, major changes in the tourism industry have taken place in the last few decades. The detection of environmental changes, in a selected site of the Red Sea coastal zone, will be helpful to protect and develop this coastal environment. A methodology for separating natural and man-made changes in satellite images was developed. It was based on the following assumptions: (1) slow changes, which occur within the range of the class reflectance, represent a natural change rather than an anthropogenic one; (2) natural changes tend to be in the same land-use/land-cover class in each date, i.e. slow changes in the reflectance, not leading to changes in the type of land-use/land-cover class from the master image to the destination one; and (3) rapid changes in the reflectance of the Earth's objects are usually related to anthropogenic activities. This technique is used to identify and assess changes along the coast of Hurghada and Ras Abu Soma, the Red Sea. Results indicate serious human impacts and the necessity for control measures and monitoring. Recommendations are presented [5]. The rapid urban development of the Hurghada area began in early 1980 to build villages and huge tourist resorts and this has continued urban development and subsequent land filling and dredging of the shoreline and the destruction of coral so far. These coastal developments have led to an increase in shoreline land filling and dredging. Despite all the environmental laws of the organization to reduce infringement on the shoreline, the abuses are still ongoing. Change detection analysis using remote sensing is a very good tool to monitor the changes condition in urban development and shoreline. Four sensors was used in this study, three of them are, Landsat Multispectral Scanner (Landsat 1 MSS), Landsat Thematic Mapper (Landsat 5 TM), Landsat Enhanced Thematic Mapper Plus (Landsat 7 ETM+) and the another one is SPOT XS 4 (Originally Système Probatoire de l’Observation de la Terre), acquired during 1972, 1984, 1992, 2004 and 2011, respectively, were used to detect and evaluate Hurghada’s urban expansion and shoreline changes. After the images have been geometrically, radio-metrically and atmospherically corrected using ENVI 5.0 software, the digital number was transformed to the reflectance values and the images were ready to change detection process with the integration of geographic information system using Arc GIS 10 software. The results show that changes during the 39 years of the shoreline is 6.29 km2, (5.65 km2 accretion and 0.64 km2 erosion) and urban development is 16.47 km2 the road network is the 8.738 km2.
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Elkafrawy, Sameh, Sameh Elkafrawy, Akram Soliman, Akram Soliman, Mohamed Bek, and Mohamed Bek. "EVALUATING SHORELINE, URBAN AND ROADS CHANGES IN THE HURGHADA AREA, EGYPT, USING MULTISPECTRAL SATELLITE IMAGES." In Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.21610/conferencearticle_58b4316250187.
Full textAbstract:
The rapid urban development in the Hurghada area since the 1980s has dramatically enhanced the potential impact of human activities. To inventory and monitor this urban development effectively, remote sensing provides a viable source of data from which updated land cover information can be extracted efficiently and cheaply. In this study, data from three satellite datasets, Landsat Thematic Mapper (Landsat 5 TM), Landsat Enhanced Thematic Mapper Plus (Landsat 7 ETM+) and Terra/Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), acquired during 1987, 2000 and 2005, respectively, were used to detect and evaluate Hurghada's urban expansion. Five change detection techniques were tested to detect areas of change. The techniques considered were image differencing, image ratioing, image overlay, multidate principal component analysis (PCA) and post-classification comparison. The post-classification comparison was found to be the most accurate procedure and produced three land use/land cover (LULC) maps of the years 1987, 2000 and 2005 with overall accuracies of 87.8%, 88.9% and 92.0%, respectively. The urban expansion analysis revealed that the built-up area has expanded by 40 km2 in 18 years (1987–2005). In addition, 4.5 km2 of landfill/sedimentation was added to the sea as a result of the coastal urban development and tourist activities. The booming coastal tourism and population pressure were considered to be the main factors driving this expansion, and some natural and artificial constraints constrained the physical shape of the city. The expansion is represented by urban fringe development, linear, infill and isolated models. Topography, lithology and structures were also analysed as possible factors that influenced the expansion. The understanding of the spatial and temporal dynamics of Hurghada's urban expansion is the cornerstone for formulating a view about the future urban uses and for making the best use of the limited resources that are available [1]. A Landsat 5 Thematic Mapper (TM) image of 1987 and a Landsat 7 Enhanced Thematic Mapper Plus (ETM+) image of 2000 were used to examine changes in land use/land cover (LULC) around Hurghada, Egypt, and changes in the composition of coral reefs offshore. Prior to coral reef bottom type classification, the radiance values were transformed to depth invariant bottom indices to reduce the effect of the water column. Subsequently, a multi component change detection procedure was applied to these indices to define changes. Preliminary results showed significant changes in LULC during the period 1987–2000 as well as changes in coral reef composition. Direct impacts along the coastline were clearly shown, but it was more difficult to link offshore changes in coral reef composition to indirect impacts of the changing LULC. Further research is needed to explore the effects of the different image processing steps, and to discover possible links between indirect impacts of LULC changes and changes in the coral reef composition [2]. Knowledge and detecting impacts of human activities on the coastal ecosystem is an essential management requirement and also very important for future and proper planning of coastal areas. Moreover, documentation of these impacts can help in increasing public awareness about side effects of unsustainable practices. Analysis of multidate remote sensing data can be used as an effective tool in environmental impact assessment (EIA). Being synoptic and frequent in coverage, multidate data from Landsat and other satellites provide a reference record and bird’s eye viewing to the environmental situation of the coastal ecosystem and the associated habitats. Furthermore, integration of satellite data with field observations and background information can help in decision if a certain activity has caused deterioration to a specific habitat or not. The present paper is an attempt to utilize remote sensing data for assessment impacts of some human activities on the major sensitive habitats of the north western Egyptian Red Sea coastal zone, definitely between Ras Gemsha and Safaga. Through multidate change analysis of Landsat data (TM & ETM+ sensors), it was possible to depict some of the human infringements in the area and to provide, in some cases, exclusive evidences for the damaging effect of some developmental activities [3]. The coastline of Hurghada has experienced considerable environmental stress from tourist and residential recreational activities. Uncontrolled tourist development has already caused substantial damage to inshore reefs and imbalance in the hydrodynamic pattern of the coastal sediments. The objective of this paper is to investigate environmental changes using multitemporal, multispectral satellite data to identify changes at Hurghada caused by anthropogenic influences. Major detected changes include resort beaches, protection structures and landfill areas; these changes are mainly due to human intervention. Two Landsat Thematic Mapper (TM) images acquired in 1984 and 1997 are used for this analysis. The landfill areas formed during this period are calculated at about 2.15 Km2 . Whilst landfill creates new inexpensive land and improves access to the sea for tourists, it is the cause of environmental problems. In addition, land-use/land-cover and beach changes are determined over the 13-year period [4]. The Red Sea coastal zone is characterized by its sensitive, fragile, unique natural resources and habitats. In the Hurghada coastal region, major changes in the tourism industry have taken place in the last few decades. The detection of environmental changes, in a selected site of the Red Sea coastal zone, will be helpful to protect and develop this coastal environment. A methodology for separating natural and man-made changes in satellite images was developed. It was based on the following assumptions: (1) slow changes, which occur within the range of the class reflectance, represent a natural change rather than an anthropogenic one; (2) natural changes tend to be in the same land-use/land-cover class in each date, i.e. slow changes in the reflectance, not leading to changes in the type of land-use/land-cover class from the master image to the destination one; and (3) rapid changes in the reflectance of the Earth's objects are usually related to anthropogenic activities. This technique is used to identify and assess changes along the coast of Hurghada and Ras Abu Soma, the Red Sea. Results indicate serious human impacts and the necessity for control measures and monitoring. Recommendations are presented [5]. The rapid urban development of the Hurghada area began in early 1980 to build villages and huge tourist resorts and this has continued urban development and subsequent land filling and dredging of the shoreline and the destruction of coral so far. These coastal developments have led to an increase in shoreline land filling and dredging. Despite all the environmental laws of the organization to reduce infringement on the shoreline, the abuses are still ongoing. Change detection analysis using remote sensing is a very good tool to monitor the changes condition in urban development and shoreline. Four sensors was used in this study, three of them are, Landsat Multispectral Scanner (Landsat 1 MSS), Landsat Thematic Mapper (Landsat 5 TM), Landsat Enhanced Thematic Mapper Plus (Landsat 7 ETM+) and the another one is SPOT XS 4 (Originally Système Probatoire de l’Observation de la Terre), acquired during 1972, 1984, 1992, 2004 and 2011, respectively, were used to detect and evaluate Hurghada’s urban expansion and shoreline changes. After the images have been geometrically, radio-metrically and atmospherically corrected using ENVI 5.0 software, the digital number was transformed to the reflectance values and the images were ready to change detection process with the integration of geographic information system using Arc GIS 10 software. The results show that changes during the 39 years of the shoreline is 6.29 km2, (5.65 km2 accretion and 0.64 km2 erosion) and urban development is 16.47 km2 the road network is the 8.738 km2.
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Naciri, M., M. Viola, Z. Wang, and R. Yam. "Mooring Line Failure Detection in the Absence of Load Monitoring." In ASME 2022 41st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/omae2022-79591.
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Abstract Mooring Integrity Management (MIM) is a key operational aspect for FPSO operators, mooring system designers and Recognized Classification Societies (RCS). MIM programs should include the capability to detect a mooring line failure. When direct or indirect measurement of line tension is available continuously and reliably over time, this requirement can be readily fulfilled. Current industry-wide experience shows it has been challenging to develop robust cost-effective real-time anchor line load monitoring systems for the offshore environment. To remedy this situation, Artificial Intelligence (AI) techniques are used to extract an intact or damage diagnosis for a spread moored unit offshore Brazil based on data readily available in situ. The Intelligent Agent (IA) developed has been reviewed by the Classification Society against Ref. [1] and [2]. Following this review a statement of maturity has been issued Ref. [3] qualifying the new technology.
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Tian, Zhen, Jianhua Zhu, and Bing Han. "Research on coral reefs monitoring using WorldView-2 image in the Xiasha Islands." In Second Target Recognition and Artificial Intelligence Summit Forum, edited by Tianran Wang, Tianyou Chai, Huitao Fan, and Qifeng Yu. SPIE, 2020. http://dx.doi.org/10.1117/12.2553067.
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Vincent, Mahamadaly, Urbina Bareto Isabel, Fréchon Louis, Pinel Romain, Garnier Rémi, and Deslarzes Kenneth. "Underwater Photogrammetry as an Environmental Assessment Tool to Monitor Coral Reefs and Artificial Structures." In Offshore Technology Conference. OTC, 2021. http://dx.doi.org/10.4043/31025-ms.
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Abstract Over the past decade, photogrammetry has grown considerably thanks to technical advances in digital cameras and computing performance. Popular in terrestrial applications with the development of UAV acquisition, photogrammetry provides access to accurate scene reconstruction, high-resolution measurements, and temporal comparisons with a wide range of geolocated and scaled 2D and 3D supports. Nowadays, photogrammetry represents a particular challenge in the underwater field such as environmental monitoring, marine construction, technical inspection, and archaeology. Our study aims to develop underwater acquisition protocols and new tools for marine resources surveys and management to understand the role of 3D characteristics in both coral reefs and artificial structures. Two specific protocols were designed and optimized to reconstruct from coral colonies to coral reefs and artificial structures (up to 500m²) with a mean resolution of 0.05cm/pixel. Here several quantitative descriptors based on 2D and 3D metrics (such as slope, length, surface, volume, rugosity) were calculated for morphological studies and temporal comparisons. The photogrammetric technique now offers higher quality and accuracy tools compared to traditional survey methods. These advantages make possible to access to new scientific surveys of underwater ecosystems and as environmental management tools may prove to be valuable for future.