Coastal Research (JCR) CERF Stories from the Field
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Multi-Scale, Multi-Proxy Investigation of Late Holocene Tropical Cyclone Activity in the Western North Atlantic Basin
Multi-Scale, Multi-Proxy Investigation of Late Holocene Tropical Cyclone Activity in the Western North Atlantic Basin François Oliva Thesis submitted to the Faculty of Graduate and Postdoctoral Studies in partial fulfillment of the requirements for the Doctorate of Philosophy in Geography Department of Geography, Environment and Geomatics Faculty of Arts University of Ottawa Supervisors: Dr. André E. Viau Dr. Matthew C. Peros Thesis Committee: Dr. Luke Copland Dr. Denis Lacelle Dr. Michael Sawada Dr. Francine McCarthy © François Oliva, Ottawa, Canada, 2017 Abstract Paleotempestology, the study of past tropical cyclones (TCs) using geological proxy techniques, is a growing discipline that utilizes data from a broad range of sources. Most paleotempestological studies have been conducted using “established proxies”, such as grain-size analysis, loss-on-ignition, and micropaleontological indicators. More recently researchers have been applying more advanced geochemical analyses, such as X-ray fluorescence (XRF) core scanning and stable isotopic geochemistry to generate new paleotempestological records. This is presented as a four article-type thesis that investigates how changing climate conditions have impacted the frequency and paths of tropical cyclones in the western North Atlantic basin on different spatial and temporal scales. The first article (Chapter 2; Oliva et al., 2017, Prog Phys Geog) provides an in-depth and up-to- date literature review of the current state of paleotempestological studies in the western North Atlantic basin. The assumptions, strengths and limitations of paleotempestological studies are discussed. Moreover, this article discusses innovative venues for paleotempestological research that will lead to a better understanding of TC dynamics under future climate change scenarios. -
Reconstruction of Prehistoric Landfall Frequencies of Catastrophic Hurricanes in Northwestern Florida from Lake Sediment Records
Quaternary Research 54, 238–245 (2000) doi:10.1006/qres.2000.2166, available online at http://www.idealibrary.com on Reconstruction of Prehistoric Landfall Frequencies of Catastrophic Hurricanes in Northwestern Florida from Lake Sediment Records Kam-biu Liu Department of Geography and Anthropology, Louisiana State University, Baton Rouge, Louisiana 70803 and Miriam L. Fearn Department of Earth Sciences, University of South Alabama, Mobile, Alabama 36688 Received December 10, 1998 proxy record of catastrophic hurricane strikes during the late Sediment cores from Western Lake provide a 7000-yr record of Holocene (Liu and Fearn, 1993). Lake Shelby is the only coastal environmental changes and catastrophic hurricane land- available millennial record of catastrophic hurricane landfalls falls along the Gulf Coast of the Florida Panhandle. Using Hur- for the Gulf of Mexico coast. Here we present a new, high- ricane Opal as a modern analog, we infer that overwash sand resolution record that spans the past 7000 yr from the Gulf layers occurring near the center of the lake were caused by cata- Coast of northwestern Florida. strophic hurricanes of category 4 or 5 intensity. Few catastrophic hurricanes struck the Western Lake area during two quiescent periods 3400–5000 and 0–1000 14C yr B.P. The landfall probabil- THE STUDY SITE ities increased dramatically to ca. 0.5% per yr during an “hyper- active” period from 1000–3400 14C yr B.P., especially in the first Western Lake (30° 19Ј 31Љ N, 86° 09Ј 12Љ W) is separated millennium A.D. The millennial-scale variability in catastrophic from the Gulf of Mexico by a 150- to 200-m-wide barrier hurricane landfalls along the Gulf Coast is probably controlled by beach (Fig. -
Seminar Coastal Morphodynamics Lecturers
Seminar Coastal Morphodynamics IMAU, Utrecht University, 2008 Lecturers: Prof. dr. Paolo Blondeaux Prof. dr. Giovanna Vittori Dpt. of Environmental Engineering University of Genoa, Italy Huib de Swart 2 1 General objective of this seminar Discuss physical processes that cause the presence of undulations of the sea bottom Example 1: Ripples at the beach Horizontal length scale ~ 10 cm ; height ~ 2 cm Generation timescale ~ hours Due to: waves Relevance: wave prediction, estimation of sediment transport 3 Example 2: Tidal sand waves Horizontal length scale ~ 500 m; height ~ 2 m Generation timescale ~ years Due to: tides Relevance: e.g, buckling of pipelines, navigation 4 2 Sand waves in the Marsdiep 5 Example 3: Sand ridges on the outer and inner shelf Britain Netherlands North Sea Tidal sand ridges Shoreface-connected sand ridges Horizontal length scale ~ km; height ~ 5-10 m Generation timescale ~ 100 years Due to: tides and storm-driven currents Relevance: sand mining, coastal stability 6 3 Research questions 1. Which mechanisms are responsible for the formation and maintenance of rhythmic topography in coastal seas? 2. Can we predict the characteristics of bedforms? • spatial pattern • migration speed • height 3. What is the response of bottom patterns to - human interventions (e.g., extraction of sand)? - sea level changes? 7 Research approaches: 1. Collection and analysis of field observations (identify phenomena+ describe behaviour) Problems: • lack of data • selection of spatial + temporal resolution • selection of spatial + temporal extent • what is transient/nontransient behaviour? 8 4 2. Collection and analysis of laboratory data C. Paolo Univ. of Minnesota Advantages: data obtained under controlled conditions Problems: link to reality (scaling problems) 9 3. -
Coastal Morphodynamics Affected by Beachrocks: Observations from Selected Beaches in Jamaica, W
Geophysical Research Abstracts Vol. 20, EGU2018-17701-1, 2018 EGU General Assembly 2018 © Author(s) 2018. CC Attribution 4.0 license. Coastal morphodynamics affected by beachrocks: observations from selected beaches in Jamaica, W. I. Taneisha Edwards and Simon Mitchell The University of the West Indies (Mona), Department of Geography and Geology, Jamaica ([email protected]) Effects of beachrocks on wave and coastal morphodynamics are not at this time known. However, since more beachrocks are becoming exposed with sea level rise and erosion it is important that we try to understand and quantify the processes in order to inform and fine-tune temporal models of beach response to daily coastal processes and storm events. The observations of wave morphodynamics at some Jamaican beaches represent a new class of beach that probably operates outside the bounds of existing morphodynamical models. Beaches affected by beachrocks in Jamaica depict a heightened backwash resulting in faster scouring and erosion. This scouring and erosion results in loss of sediment seaward. Beachrock when buried does not directly affect waves but indirectly affects the backwash by changing the porosity of the beach body. This change will negatively affect the drainage regime, by reducing the infiltration potential of the swash and increasing the backwash. Alternately, when beachrocks are exposed waves are directly affected; in early stages of exposure, beachrock appears to be a buffer and protects the beach from erosion by reflecting and refracting waves. Sediment is often build up behind the beachrock. However, after prolonged exposure, the opposite is seen where the beachrock is isolated, and the profile of the beach is lowered as most of the sediment is loss and physical features of erosion persist such as scarps, and scour lagoons behind the beachrock on the shore-face. -
Modelling the Impact of Coastal Defence Structures on the Nearshore Morphodynamics
MODELLING THE IMPACT OF COASTAL DEFENCE STRUCTURES ON THE NEARSHORE MORPHODYNAMICS A thesis submitted to Cardiff University in candidature for the degree of Doctor of Philosophy by Fernando Alvarez-Martinez Hydro-environmental Research Centre School of Engineering Cardiff University 2016 Acknowledgements ACKNOWLEDGEMENTS I would like to express my appreciation to the people and organisations that supported and accompanied me in this long journey. To the School of Engineering of Cardiff University for supporting this PhD programme. To all Cardiff University staff in the Research, Finance and Teaching offices for their support to all PhD students, making things easier for all during the process. To family and friends that always supported me and encouraged me to keep going until the end. To Dr. Shunqi Pan for his patience, advice and support during all the stages of this PhD and to Professor Roger A. Falconer for his support. i Abstract MODELLING THE IMPACT OF COASTAL DEFENCE STRUCTURES ON THE NEARSHORE MORPHODYNAMICS Fernando Alvarez-Martinez ABSTRACT Coastal areas are heavily populated in countries around the world and are a source of economic activity, both recreational and industrial. Waves and tides interact with sediments in a dynamic equilibrium which leads to coastal morphological changes at different temporal and spatial scales. Natural or human-induced changes in this equilibrium may lead to an alteration of the coastline causing environmental or economic impacts. Coastal defences are often needed in order to protect specific areas and reduce such impacts. Therefore, understanding the impact that coastal defence structures have on coastal morphological changes is important for coastal managers. -
Beach Safety in Atypical Rip Current Systems: Testing Traditional Beach Safety Messages in Non-Traditional Settings
Beach safety in atypical rip current systems: testing traditional beach safety messages in non-traditional settings Benjamin Robert Van Leeuwen A thesis in fulfilment of the requirements for the degree of Master of Science School of Biological, Earth and Environmental Science (BEES) Faculty of Science Supervisors: Associate Professor Robert Brander, School of Biological, Earth and Environmental Sciences, UNSW Australia, Sydney, NSW, 2052, Australia Professor Ian Turner, Water Research Laboratory, School of Civil and Environmental Engineering, UNSW Australia, Manly Vale, NSW, 2093, Australia July 2015 PLEASE TYPE THE UNIVERSITY OF NEW SOUTH WALES Thesis/Dissertation Sheet Surname or Family name: Van Leeuwen First name: Benjamin Other name/s: Robert Abbreviation for degree as given in the University calendar: MSc School: School of Biological, Earth and Environmental Sciences Faculty: Science Title: Beach safety in atypical rip current systems: testing traditional beach safety messages in non-traditional settings Abstract 350 words maximum: (PLEASE TYPE) As a major coastal process and hazard, rip currents are a topic of considerable interest from both a scientific and safety perspective. Collaborations between these two areas are a recent development, yet a scientific basis for safety information is crucial to better understanding how to avoid and mitigate the hazard presented by rip currents. One such area is the field of swimmer escape strategies. Contemporary safety advice is divided on the relative merits of a ‘Stay Afloat’ versus ‘Swim Parallel’ strategy, yet conceptual understanding of both these strategies is largely based on an idealised model of rip current morphology and flow dynamics where channels are incised in shore-connected bars. -
Alcohol and Hate by LUKE Mcilveen and KARA LAWRENCE December 12, 2005 THEY Called It a Day of Pride, but It Will Go Down As a Day of National Disgrace
Click here to print this page Alcohol and hate By LUKE McILVEEN and KARA LAWRENCE December 12, 2005 THEY called it a day of pride, but it will go down as a day of national disgrace. Thousands of drunken youths descended on Cronulla yesterday for the race riots police had feared. "I'm an Australian, I was born here," a Middle Eastern youth told locals who had taunted him with chants of "Kill Lebs". Minutes later, he was left covered in blood, punched to the ground and kicked, before being led to safety by police. Two Middle Eastern girls were also pushed to the ground and pelted with beer bottles as police tried to rescue them. The day began as a show of solidarity with thousands of locals draping themselves in Australian flags and calling for peace in their beachside suburb. Up to 150 police, including the dog squad and the PolAir helicopter, were positioned to cope with the 5000-strong crowd. But as the beer flowed into the afternoon, the huge crowd became violent, roaming the streets in search of a target for their anger. The threats had been made since two volunteer lifesavers were bashed eight days ago -- and yesterday, they were looking to get square. Few Middle Eastern youths came to Cronulla, but those who did became victims of mob justice. Police reacted only to rescue the victims of the bashings and rushed them to safety through the front entrance of the local Northies pub. "What the Lebs did last week was low and it's time we showed a bit of pride towards where we live," Luke O'Brien, a volunteer lifesaver said. -
ENGADINE DRAGONS CRICKET CLUB INC Newsletter No.1
2018/2019 Season Newsletter No.1 engadinedragonscc.org.au ENGADINE DRAGON CRICKET CLUB Page 2 ENGADINE DRAGON CRICKET CLUB Page 2 ENGADINE DRAGON CRICKET CLUB Page 3 DRAGON’S NEWS Welcome to another season of cricket with the Dragons as the Club celebrates its 60th Anniversary – This season the Club will be fielding 14 junior teams (140 players) an increase of 2 teams. With player numbers dropping across the Association Engadine are only one of a couple of clubs that has seen a rise in junior registrations. Our senior numbers have dropped this season from 7 teams to 5 teams (82 players). There have been a number of big changes to the junior competition with the U10 and U12 no longer playing two day matches opting for one day games, batting restrictions, reduced fielders and shorter pitches. These changes are part of Cricket Australia’s vision to increase player participation. Sponsorship – This season is looking to be the most supported season in relation to sponsorship. We welcome back our existing Gold Sponsors – Plus Fitness 24/7 Engadine, Generation Legal and Club Engadine who have returned again for another season without any hesitation. The Engadine Bowling Club have increased their sponsorship this season which puts them into the Gold Level Sponsorship, which is awesome news for the club, we love having our club night at the Bowlo. Our other returning sponsors for the season are Terri Mackay Reality, 20/20 Sports Physiotherapy, Engadine Town Square, GNP Marine Trimming, Razor Cuts Barbers, Corner Brew Cafe and The Engadine Tavern. We are very grateful to have their ongoing support. -
Draft Cronulla Centre Strategy Draft Cronulla Centre Strategy
DRAFT CRONULLA CENTRE STRATEGY DRAFT CRONULLA CENTRE STRATEGY Executive Summary The purpose of this strategy document is to present a vision for the Cronulla Centre which makes provision for more housing opportunities, balancing increased development with the protection of the environmental, scenic and lifestyle values that create Cronulla’s unique character. The strategy also aims to improve the pedestrian experience and ease of use of the centre, including improved pedestrian connections, particularly between Gunamatta Bay, the railway station and commercial centre and the beach. Cronulla is an iconic seaside suburb which is important as both a residential location and as a centre of tourism. The centre has the benefit of proximity to scenic waterways and natural areas. Cronulla is defined by the NSW Draft South Subregional Strategy as a Town Centre. There is strong demand for new prestige flats in this premium location, which has led to Council’s review of the current planning framework. Cronulla is a favoured location for older Shire residents looking to downsize to apartments as well as young people wanting access to beaches and entertainment. Residents enjoy the beachside location and in turn support local businesses. New mixed use developments in the centre would improve the quality of the built environment and enliven the experience of the centre, while potentially making available a wider range of shops and services. This review of the planning strategy for the Cronulla centre seeks a balance between allowing good quality development to occur, while preserving the existing relaxed ambience of the centre and improving the amenity and attractiveness of Cronulla as a place to live and visit. -
Influence of Wave Shape on Sediment Transport in Coastal Regions
Archives of Hydro-Engineering and Environmental Mechanics Vol. 65 (2018), No. 2, pp. 73–90 DOI: 10.1515/heem-2018-0006 © IBW PAN, ISSN 1231–3726 Influence of Wave Shape on Sediment Transport in Coastal Regions Rafał Ostrowski Institute of Hydro-Engineering, Polish Academy of Sciences, ul. Kościerska 7, 80-953 Gdańsk, Poland e-mail: [email protected] (Received September 05, 2018; revised November 11, 2018) Abstract The paper deals with the influence of the wave shape, represented by water surface elevations and wave-induced nearbed velocities, on sediment transport under joint wave-current impact. The focus is on the theoretical description of vertically asymmetric wave motion and the effects of wave asymmetry on net sediment transport rates during interaction of coastal steady cur- rents, namely wave-driven currents, with wave-induced unsteady free stream velocities. The cross-shore sediment transport is shown to depend on wave asymmetry not only quantitatively (in terms of rate), but also qualitatively (in terms of direction). Within longshore lithodynamics, wave asymmetry appears to have a significant effect on the net sediment transport rate. Key words: wave shape, nearbed free stream velocities, wave-driven currents, cross-shore sediment transport, longshore sediment transport 1. Introduction Many coastal engineering problems are associated with changes in the sea bed profile. Investigations of this evolution are partly related to search for the origin of bars and theoretical description of their migration. Besides, the knowledge of sea bed dynam- ics makes it possible to accurately predict changes in the shoreline position. Conven- tionally, coastal morphodynamics are modelled theoretically by means of the spatial variability of net sediment transport rates. -
Cronulla SLSC Annual Report 2016-17
CRONULLA SLSC 110TH ANNUAL REPORT 2016-2017 SEASON WORLD CHAMPION Chloe Mannix-Power World Life Saving Champion - Youth Female Beach Sprint JOHN & KERRYN SALMON OAM - CRONULLA SLSC A lifetime commitment to Surf Life Saving and Bushcare has resulted in the Order of Australia medal being bestowed on John Salmon. John joined Cronulla SLSC in 1949 at the age of 14 and quickly established himself as an outstanding surfboard paddler. In the early 1960s John transferred his interests to Wanda where he became involved with the administration of the club, serving time as President. At Wanda John and Kerryn were involved for the first nine years in the organisation and running of the Sutherland to Surf fun run and walk. After a short stay with Elouera John and Kerryn moved to Bateau Bay on the Central Coast. At Bateau Bay John and Kerryn co-founded the volunteer Bateau Bay Bushcare group and have played an active part in the creation and restoration of bushland. In recent years John has been part of the group who compiled our 100 year book - The Cronulla Story. John is a Life Member of both the Cronulla and Wanda Surf Life Saving Clubs. John & Kerryn Salmon OAM - Cronulla SLSC 2 CRONULLA SURF LIFE SAVING CLUB ANNUAL REPORT 2016-2017 CRONULLA SURF LIFE SAVING CLUB INCORPORATED FOUNDED 1907 OFFICIALS FOR THE 2016-2017 SEASON PATRON G.C. Forshaw VICE PATRONS J.W. Bentley, K.E. English, I.A. Goode OAM, J.H. Hollingdale PRESIDENT R.P. Short DEPUTY PRESIDENT D.J. Wood CLUB CAPTAIN C.A. Barber SECRETARY E. -
Coastal Morphodynamics and Human Impacts Roshan T Ramessur* Department of Chemistry, Faculty of Science, University of Mauritius
astal D o ev f C e o lo l p a m Ramessur, J Coast Dev 2013, 16:3 n r e u n t o J Journal of Coastal Development DOI: 10.4172/1410-5217.1000e104 ISSN: 1410-5217 EditorialResearch Article OpenOpen Access Access Coastal Morphodynamics and Human Impacts Roshan T Ramessur* Department of Chemistry, Faculty of Science, University of Mauritius Keywords: Coastal erosion and accretion rehabilitation; Coastal the loss of settlements, such as villages and towns. Countries are now protection; Coastal engineering solutions. increasingly being affected mostly by hydrogeometeorological hazards and disasters, namely, floods, mass movements (e.g. erosion, landslides It has long been obvious that our beaches have evolved with time and siltation), tropical cyclones, hurricanes, tsunamis, swells and storms in response to factors including the supply of sediment, the action of due to climate change [1-4]. The Special Issue in the Journal of Coastal waves and currents, geological constraints, structures and sea level rise. Development on “Coastal Morphodynamics and Human Impacts” The coastal zone is a delicate dynamic balance between the powerful will deal with papers on erosion and accretion, coastal protection and driving forces of the ocean such as cyclones, waves, surges and tides rehabilitation and coastal conservation plan, shoreline modifications as well as the reef-lagoon-beach ecosystem. It offers protection against and human impacts. Articles can deal with coastal evolution and sea these processes, as well, as producing sediments for the beaches and level rise, seasonal variation, storm response, conceptual models as should be viewed as one complex multidisciplinary entity with the scientific and engineering tools for a variety of coastal landforms and various conflicting uses and activities taking place within the zone.