Download or read book Sediment transport in a fringing reef Cane Bay St Croix United States Virgin Islands written by James Lester Sadd and published by . This book was released on 1980 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sediment Transport and CaCO3 Budget on a Fringing Reef Cane Bay St Croix U S Virgin Islands written by James Lester Sadd and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: States that in the U.S. Virgin Islands, population and tourist industry growth has badly depleted sand and gravel resources for use as building aggregate, that led to a search of the island shelves for new resources and sand being identified as the most accessible. However, the beaches are a valuable recreational resource, a habitat for endangered species, and as an aesthetic natural environment worth preserving. Points to the need for an understanding of carbonate sediment production, accumulation and transport that may prove valuable in future decisions regarding offshore sand mining as practiced in some islands.
Download or read book Mesophotic Coral Ecosystems written by Yossi Loya and published by Springer. This book was released on 2019-05-22 with total page 1003 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book summarizes what is known about mesophotic coral ecosystems (MCEs) geographically and by major taxa. MCEs are characterized by light-dependent corals and associated communities typically found at depths ranging from 30-40 m. and extending to over 150 m. in tropical and subtropical ecosystems. They are populated with organisms typically associated with shallow coral reefs, such as macroalgae, corals, sponges, and fishes, as well as specialist species unique to mesophotic depths. During the past decade, there has been an increasing scientific and management interest in MCEs expressed by the exponential increase in the number of publications studying this unique environment. Despite their close proximity to well-studied shallow reefs, and the growing evidence of their importance, our scientific knowledge of MCEs is still in its early stages. The topics covered in the book include: regional variation in MCEs; similarities and differences between mesophotic and shallow reef taxa, biotic and abiotic conditions, biodiversity, ecology, geomorphology, and geology; potential connectivity between MCEs and shallow reefs; MCE disturbances, conservation, and management challenges; and new technologies, key research questions/knowledge gaps, priorities, and future directions in MCE research.
Download or read book Journal of Sedimentary Petrology written by and published by . This book was released on 1992 with total page 678 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sediment transport and sediment budget in the fore reef zone of a fringing coral reef Discovery Bay Jamaica written by William Richard Meaney and published by . This book was released on 1973 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecology Abstracts written by and published by . This book was released on 1985 with total page 1008 pages. Available in PDF, EPUB and Kindle. Book excerpt: Indexes journal articles in ecology and environmental science. Nearly 700 journals are indexed in full or in part, and the database indexes literature published from 1982 to the present. Coverage includes habitats, food chains, erosion, land reclamation, resource and ecosystems management, modeling, climate, water resources, soil, and pollution.
Download or read book Boletin de Ciencias Marinas written by and published by . This book was released on 1984 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aquatic Sciences and Fisheries Abstracts written by and published by . This book was released on 1985 with total page 1212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Masters Theses in the Pure and Applied Sciences written by W. H. Shafer and published by Springer. This book was released on 1982-02-01 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and dis seminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the ac tivity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volume were handled by an international publishing. house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 25 (thesis year 1980) a total of 10,308 theses titles from 27 Canadian and 214 United States universities. We are sure that this broader base for theses titles reported will greatly enhance the value of this important annual reference work. While Volume 25 reports theses submitted in 1980, on occasion, certain universities do report theses submitted in previous years but not reported at the time.
Download or read book Sediment Transport and Deposition in Lakes Marion and Moultrie South Carolina 1942 85 written by Glenn G. Patterson and published by . This book was released on 1996 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Petroleum Abstracts Literature and Patents written by and published by . This book was released on 1985 with total page 1486 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Terrigenous Sediment Dynamics in a Small Tropical Fringing reef Embayment written by and published by . This book was released on 2016 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anthropogenic watershed disturbance by industry, agriculture, deforestation, roads, and urbanization alters the timing, composition, and mass of sediment loads to coral reefs, causing enhanced sediment stress on corals near the outlets of impacted watersheds (Syvitski et al., 2005; West and van Woesik, 2001). Few studies have developed an integrated understanding of sediment sources, transport processes, and deposition in small, reef-fringed embayments (Bartley et al., 2014; Draut et al., 2009; Wolanski et al., 2003) and many are outside the scope of local environmental managers in remote islands like at the study site, Tutuila, American Samoa. Ridge-to-Reef studies on sediment dynamics have three general components, which are reflected in the three chapter structure of this dissertation: watershed inputs, hydrodynamic circulation over the reef, and how they interact to govern spatiotemporal distribution of sediment accumulation on the reef. This dissertation provides an example of how a scientific, process-oriented Ridge to Reef study of sediment dynamics can answer critical scientific questions about the source, transport, and fate of sediment in the near-shore environment, and how answers to the scientific questions can support local coral management. Data on suspended sediment yield (SSY) from small, steep, tropical watersheds is limited, and assessments of sediment mitigation projects have been hindered by interannual climatic and sediment source variability. Chapter 1 used an event-wise approach to compare SSY from disturbed and undisturbed subwatersheds from storms of the same size, estimate total SSY to Faga'alu Bay, and estimate annual SSY to compare to other watersheds. It was unknown what the dominant sediment source was in Faga'alu watershed, and what potential management solutions were available. The sediment budget developed in the first chapter of this dissertation showed the quarry was a significant source, compared to natural background, and so local managers focused on reducing sediment discharge from the quarry. Continued monitoring presented in the third dissertation chapter showed SSY to the Bay was significantly reduced following sediment mitigation at the quarry. The fate of suspended sediment once it enters the marine environment is difficult to predict, but is strongly controlled by hydrodynamic conditions and circulation patterns. Computer models of hydrodynamic circulation require detailed forcing data, bathymetric data, and computer resources that are often unavailable to local managers. Chapter 2 of the dissertation used a simple approach combining Lagrangian GPS-logging drifters and Eulerian acoustic current profilers to determine dominant water circulation patterns under the most common conditions that characterize forcing in the Bay: calm, high onshore winds, and high waves. Measuring sediment accumulation on the reef is a contested area of research and the most common method, using tube traps, has some weaknesses. Others argue flat surfaces should be used to show net sediment accumulation. Chapter 3 presents results from both tubular sediment traps and flat-surfaced sediment pods to show gross vs net monthly sediment accumulation over one year. While many studies deploy traps haphazardly, or just below stream outlets, here sediment traps were arranged to observe spatial patterns between the north and south sections of the reef, as a result of prevailing currents and distance from the stream outlet. Integrating SSY and water circulation from Chapters 1 and 2 with observations of sediment accumulation in Chapter 3 showed that the predominant water circulation patterns deflect the storm-supplied terrigenous sediment from the stream over the northern reef where it caused enhanced sediment stress on corals. Temporal patterns of sedimentation were complex, and only the site nearest the stream outlet correlated with monthly SSY from the watershed, whereas nearly all sites showed increased carbonate sedimentation with increased wave energy. Sediment accumulated in traps and on sediment pods was mostly similar to surrounding benthic sediment, and correlated with wave energy, showing most sediment transport over the reef was from wind and wave-forced resuspension of carbonate sediment.
Download or read book Bibliography and Index of Geology written by and published by . This book was released on 1983 with total page 1846 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shelf Sediment Transport Process and Pattern written by Donald J. P. Swift and published by . This book was released on 1973 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains papers presented in a symposium on Shelf Sediment Transport conducted at the annual meeting of the Geological Society of America held in Washington, D.C., November 1971.
Download or read book The Effect of Watershed Runoff and Sediment Resuspension on Turbidity and Sediment Deposition in St John US Virgin Islands written by Stephen E. Campbell and published by . This book was released on 2017 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the US Virgin Islands (USVI), land-based (terrigenous) sedimentation has been identified as a major cause of coral stress. Development, such as the building of unpaved roads in steep coastal watersheds, has increased sediment yields and marine terrigenous sedimentation by up to an order of magnitude above background levels. When activated during storm events, ephemeral streams transport sediment from the watershed to coastal waters. Once deposited on the seafloor, resuspension of benthic sediments can further increase turbidity and deposition. However, isolating the relative contributions of runoff and resuspension to turbidity and deposition using conventional sediment trap monitoring has been challenging. Here we describe the spatial and temporal variability of marine sediment dynamics in response to runoff and resuspension events in St. John, USVI. Between late July 2013 and January 2014, nephelometers were deployed at three reef and five shoreline sites next to ephemeral stream outfalls equipped with a water level sensor (10-min resolution) and peak crest gauges (~13-day resolution). At each instrument site, benthic sediment samples were collected every ~26 days. While runoff events resulted in high-magnitude spikes in turbidity and deposition, which were up to 900 and 17,000 times background, respectively, they were short-lived (hours). Resuspension-induced spikes in turbidity and deposition were lower in magnitude but of longer duration (days-weeks), particularly at sites with finer-grained benthic sediments, and were associated with increased wave height during low tides. While the relative contribution of runoff and resuspension to turbidity and deposition were spatially variable between our study sites, resuspension contributed at least 7 times more to turbidity and 3 times more to deposition than runoff during the 2013 rainy season at one of our coastal marine monitoring sites. Though previous studies have measured marine sedimentation over months-centuries in St. John, no studies have monitored turbidity or the relative contributions to turbidity and deposition from runoff and resuspension at the time scale of minutes-days. Understanding the relative contribution of runoff vs. resuspension to marine turbidity and deposition is important to effectively manage land-based sedimentation, marine development, as well as evaluate the effectiveness of watershed restoration programs which aim to reduce marine terrigenous sedimentation.
Download or read book Bottom Sediment Transport written by Donald Ormond Hodgins and published by . This book was released on 1986 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sediment transport and soil liquefaction under wave loading are major concerns for offshore hydrocarbon developments in Canadian waters. This report presents a state-of-the-art review of five topics concerned with seabed mobility and liquefaction, together with a summary of research priorities to address a number of outstanding problems facing the offshore industry. The review deals with sediment transport produced by waves and currents without structures such as pipelines or platform footings present to modify the flow. Thus such topics as localized scour around structures are not considered.
Download or read book Wave Changes and Mass Transport on Tague Reef St Croix US Virgin Islands written by H. H. R. and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
