Uncertainties in Sandy Shorelines Evolution Under the Bruun Rule Assumption
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Ufl/Coel-92/008 Historical Shoreline Response To
Historical shoreline response to inlet modifications and sea level rise (M.S. Engineering Thesis) Item Type monograph Authors Grant, Jonathan R. H. Publisher University of Florida, Coastal and Oceanographic Engineering Department Download date 05/10/2021 11:16:43 Link to Item http://hdl.handle.net/1834/18449 UFL/COEL-92/008 HISTORICAL SHORELINE RESPONSE TO INLET MODIFICATIONS AND SEA LEVEL RISE by Jonathan R. H. Grant Thesis May 1992 HISTORICAL SHORELINE RESPONSE TO INLET MODIFICATIONS AND SEA LEVEL RISE By JONATHAN R. H. GRANT A THESIS PRESENTED TO THE GRADUATE SCHOOL OF THE UNIVERSITY OF FLORIDA IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF ENGINEERING UNIVERSITY OF FLORIDA 1992 ACKNOWLEDGEMENTS I would like to thank my advisor, Dr. Robert Dean, for all of his assistance and utmost patience in helping me complete this thesis. The assistance of my other committee members, Dr. Ashish Mehta and Dr. Daniel Hanes, is greatly appreciated. I would like to thank Cynthia Vey, Sandra Bivins, Becky Hudson, Helen Twedell and Sabarna Malakar for their patience, humor and help in transforming my research into a thesis. I would also like to thank all of the professors who have taught me so much outside of my research work. This work was sponsored by Florida Sea Grant, whose continued support of coastal re- search is appreciated. The data used in this study were supplied by the Florida Department of Natural Resources. Special thanks goes to Emmett Foster (of FDNR) for taking the time to help furnish the most up to date shoreline data. -
Erosion Is the Process Where Soft Shorelines (Sand, Gravel Or Cobble) Disappear and Land Is Lost
COASTAL EROSION Action Guide What is Coastal Erosion? Erosion is the process where soft shorelines (sand, gravel or cobble) disappear and land is lost. Erosion generally comes in two forms: 1. A Natural part of the coastal environment where a soft shore moves and changes in response to cyclic climate conditions and 2. Erosion can be induced by human interference of natural sand movement and budget patterns. Erosion can be slow and ongoing over many years or fast and dramatic following large storm events. Many erosion problems in the Pacific today, occur because of poor planning, inappropriate shoreline development, overcrowding, beach mining for building material and due to reef degradation. Erosion is a natural process It is important to understand that erosion is a natural process and in many cases is accompanied by its equal and opposite process “accretion”. Put simply, sandy shorelines are dynamic and should be expected to shift and change over time, sometimes by 100’s of meters. This process becomes an “erosion problem” if development is not carefully planned to avoid unstable shorelines. Why is it that erosion seems more of a problem these days? In past times, people lived in harmony with their moving coasts. Their houses could be easily moved to and shoreline homes were built in way which did not disturb shoreline processes (eg. On stilts or pylons). People knew and avoided dangerous or unstable locations. Today, building styles have changed and homes cannot be easily moved or replaced and lack of space often results in people building in locations which are known to be inappropriate. -
PDF Brunel Et Al., 2014
Geomorphology 204 (2014) 625–637 Contents lists available at ScienceDirect Geomorphology journal homepage: www.elsevier.com/locate/geomorph 20th century sediment budget trends on the Western Gulf of Lions shoreface (France): An application of an integrated method for the study of sediment coastal reservoirs C. Brunel a,⁎,R.Certaina, F. Sabatier b,N.Robina, J.P. Barusseau a,N.Alemana, O. Raynal a a Université de Perpignan, Laboratoire d'Etudes des Géo-Environnements Marins, 52 av. P Alduy, 66860 Perpignan, France b Aix Marseille Université, CEREGE, UMR 7330 CNRS, Europôle Méditerranéen de l'Arbois, 13545 Aix en Provence Cedex 4, France article info abstract Article history: This paper presents a shoreface sediment budget established for the 20th century (1895–1984–2009) along the Received 17 April 2013 microtidal wave-dominated coast of the western Gulf of Lions (Languedoc-Roussillon, Mediterranean Sea, SE Received in revised form 6 September 2013 France). The implementation of a diachronic bathymetric approach, coupled with the definition of sand reser- Accepted 12 September 2013 voirs (upper sand unit — USU) by very high-resolution seismic surveys and the results of LiDAR investigations, Available online 2 October 2013 offers a new means of defining precisely the magnitude and change trends of the sediment budget. The aim of this study is to link the Large Scale Coastal Behaviour (LSCB) of the littoral prism (expressed in terms of shoreface Keywords: Shoreface sediment budget sediment budget, shoreface sediment volume and spatial distribution pattern of cells) to climatic change, river Large Scale Coastal Behaviour sediment input to the coast, longshore sediment transport distribution, impact of hard coastal defence structures Seismic surveys and artificial beach nourishment. -
Predicting Shoreline Evolution on a Centennial Scale Using the Example of the Vistula (Baltic) Spit I
ISSN 00014370, Oceanology, 2012, Vol. 52, No. 5, pp. 700–709. © Pleiades Publishing, Inc., 2012. Original Russian Text © I.O. Leont’yev, 2012, published in Okeanologiya, 2012, Vol. 52, No. 5, pp. 757–767. MARINE GEOLOGY Predicting Shoreline Evolution on a Centennial Scale Using the Example of the Vistula (Baltic) Spit I. O. Leont’yev Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia Email: [email protected] Received March 31, 2011; in final form, November 22, 2011 Abstract—The proposed algorithm comprises three main steps. The first step is the evaluation of the sedi ment transport and budget. It was shown that the root segment of the Vistula Spit is dominated by eastward longshore sediment transport (up to 50 thousand m3/year). Over the rest of the spit, the shoreline’s orienta tion causes westward sediment transport (more than 100 thousand m3/year). The gradients of the longshore and cross shore sediment transport become the major contributors to the overall sediment balance. The only exception is the northeastern tip of the spit due to the appreciable imbalance of the sediment budget (13 m3 m–1 yr–1). The second step in the prediction modeling is the estimation of the potential sealevel changes during the 21st century. The third step involves modeling of the shoreline’s behavior using the SPELT model [6, 7, 8]. In the most likely scenario, the rate of the recession is predicted to be about 0.3 m/year in 2010–2050 and will increase to 0.4 m/year in 2050–2100. The sand deficit, other than the sealevel rise, will be a key factor in the control of the shoreline’s evolution at the northeastern tip of the spit, and the amount of recession will range from 160 to 200 m in 2010–2100. -
Sea Level Rise and Coastal Morphological Changes on Tropical Islands New Caledonia and French Polynesia (South Pacific) the Project
Manuel Garcin, Marissa Yates, Goneri Le Cozannet, Patrice Walker, Vincent Donato Sea level rise and coastal morphological changes on tropical islands New Caledonia and French Polynesia (South Pacific) The Project • Work completed within the CECILE project (Coastal Environmental Changes: Impact of sea LEvel rise )=> See Poster Le Cozannet et al. same session • Project objectives: to contribute to assessing the physical impact of sea level rise on shorelines during the recent past (last 50 years) and near future (next 100 years). • Focus on tropical islands : New Caledonia, French Polynesia, La Réunion (Indian Ocean), French Caribbean • What is the importance of recent sea level rise with respect to other causes of change ? • What will be the consequences of sea level rise for coastal change in the future ? GARCIN M., YATES M., LE COZANNET G., WALKER P., DONATO V. (EGU 2011) ‐ Sea level rise and coastal morphological changes on tropical islands Generic driving factors influencing coastline mobility, dynamics and morphology Coastline mobility is an indicator integrating numerous parameters • 5 families of driving factors affecting coastline mobility Erosion, accretion, transport... – Climate change External geodynamics – External geodynamic processes Pluviometry processes linked to climate change Biological Sea Level – Internal geodynamic Change, processes winds, storms, processes pluviometry... – Biological processes Coastline Anthropogenic Climate change actions and – Anthropogenic actions and mobility impacts impacts Tectonic, vertical Sea defences, • To note : interactions & movements, gravels isostasy... extraction, mining, retroactions daming.... Internal geodynamics processes GARCIN M., YATES M., LE COZANNET G., WALKER P., DONATO V. (EGU 2011) ‐ Sea level rise and coastal morphological changes on tropical islands Driving factors Or The data problem GARCIN M., YATES M., LE COZANNET G., WALKER P., DONATO V. -
Shoreline Response to Future Sea Level Rise James Houston Director Emeritus Engineer Research and Development Center Shoreline Response to Future Sea Level Rise
Shoreline Response to Future Sea Level Rise James Houston Director Emeritus Engineer Research and Development Center Shoreline Response to Future Sea Level Rise Florida Florida Sandy Shorelines 1300 km Sandy Shorelines West East Southwest 0 200 kilometers Tourism is Its Leading Industry • Beaches its leading tourist Ft Myers Beach destination • Consequently, Florida beaches studied extensively Miami Beach Destin Beach St Petersburg Beach Shoreline Change • Shoreline position measurements from 1867- 2015 300 m Measurement • Shoreline change Locations East + 50 ± 5 m Southwest + 35 ± 15 m West - 25 ± 10 m • 1867 to before beach nourishment (1970, 1985) East + 25 ± 5 m Southwest + 5 ± 10 m West - 30 ± 10 m Accretion/Erosion Accretion Accretion • Netherland’s central coast has accreted since at least 1900 Onshore transport • Similar onshore transport on Excess Florida’s east/southwest coasts shoreface sand (Houston & Dean, 2014; Houston, 2015) • In contrast, the Florida west coast has eroded like many world coasts Florida West Coast West Coast West Counties (Political subdivisions) Understand the Past to Project the Future • Past (1867 - 2015) - Determine shoreline change using measured data - Quantify processes causing this change • Future (50 year and to 2100) - Project shoreline change with increased sea level rise - Analyze whether beach 2065 2016 nourishment can counter this increased rise Past Shoreline Change, 1867 - 2015 W ΔV ΔV LΔT dQ LΔTϕ LΔX = − LΔS ∗ − sink + source − + h + B h + B h + B dy h + B ∗ ∗ h∗ + B ∗ ∗ Measured Sea Level -
The Modified Bruun Rule Extended for Landward Transport
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by UNL | Libraries University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln US Army Research U.S. Department of Defense 2013 The modified Bruun Rule extended for landward transport J.D. Rosati U. S. Army Corps of Engineers, [email protected] R.G. Dean University of Florida T.L. Walton Coastal Tech Corp Follow this and additional works at: https://digitalcommons.unl.edu/usarmyresearch Rosati, J.D.; Dean, R.G.; and Walton, T.L., "The modified Bruun Rule extended for landward transport" (2013). US Army Research. 219. https://digitalcommons.unl.edu/usarmyresearch/219 This Article is brought to you for free and open access by the U.S. Department of Defense at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in US Army Research by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. Marine Geology 340 (2013) 71–81 Contents lists available at SciVerse ScienceDirect Marine Geology journal homepage: www.elsevier.com/locate/margeo The modified Bruun Rule extended for landward transport J.D. Rosati a,⁎, R.G. Dean b, T.L. Walton c a U. S. Army Corps of Engineers, Washington, DC 20314, United States b University of Florida, Gainesville, FL 32605, United States c Coastal Tech Corp., Tallahassee, FL, United States article info abstract Article history: The Bruun Rule (Bruun, 1954, 1962) provides a relationship between sea level rise and shoreline retreat, and Received 3 January 2013 has been widely applied by the engineering and scientific communities to interpret shoreline changes and to Received in revised form 24 April 2013 plan for possible future increases in sea level rise rates. -
The Bruun Rule: Its Validity and Its Limitation
The Bruun Rule: its validity and its limitation As you have already learned, sea level rise is one of the main problems affecting coastal zones on a global scale. It is not as simple as that the coast will just drown as if the coast is in a bath tub with increasing water level, since the coast will respond in a dynamic sense. Actually, a natural coast will adapt to sea level rise, the coast will want to keep pace with sea level rise, raising its profile relative to the sea level. A perfect response to rising sea levels! In order to do this a sediment budget deficit is created however. How does this actually work? Bruun (a Danish born coastal engineer that spent most of his career as a University Professor in Gainesville, FL, USA) was the first to describe this effect in 1962. The main idea behind the Bruun- Rule (c.f. Bosboom and Stive, 2010) is the assumption that the upper shore face (the morphologically active -on a time scale of years- part of the continental shelf, vertically extending from the first dune or berm ridge to a depth of 5 m to 20 m depending on the strength of the stormy waves) has a profile that is in equilibrium with the hydrodynamic forcing (i.e. wave driven processes mainly, but also density driven currents near river or estuarine entrances) and that for any perturbation in the forcing, the response of the profile will be relatively fast (see the video The origin and evolution of beaches, with the sand castle being absorbed in the coastal profile within a few wave motions). -
Beach Erosion in the Gulf of Castellammare Di Stabia in Response to the Trapping of Longshore Drifting Sediments of the Gulf of Napoli (Southern Italy)
geosciences Article Beach Erosion in the Gulf of Castellammare di Stabia in Response to the Trapping of Longshore Drifting Sediments of the Gulf of Napoli (Southern Italy) Micla Pennetta ID Dipartimento di Scienze della Terra, dell’Ambiente e delle Risorse (DiSTAR), Università degli Studi di Napoli “Federico II”, 80138 Naples, Italy; [email protected] Received: 10 May 2018; Accepted: 25 June 2018; Published: 27 June 2018 Abstract: The results of this study have allowed verification that longshore sediment transport along the coast of Napoli Gulf (southern Italy) takes place from Northwest to Southeast. The current analysis describes the results of an integrated sedimentological and geomorphological study of the Neapolitan coastal area. A sedimentological and morphosedimentary study was carried out by bathymetric survey and sampling of bottom sediments. The analysis of modal isodensity curves shows that all the sediments are moved from NW to SE by longshore currents parallel to the coastline. The morphological evolution of the Castellammare di Stabia Gulf coastal area, based on historical coastline changes, starts from 1865, when the sandy littoral was wide and in its natural state. Since the construction of the Torre Annunziata harbor in 1871, sediments transported by a NW-SE longshore drift have become trapped, inducing the genesis of a new wide triangular-shaped beach on the updrift side (NW) of the harbor breakwall. This process induced a significant shoreline retreat of the south-east sector of the littoral. Widespread beach erosion of the coastal physiographic unit of Castellammare di Stabia Gulf (delimited by two ports) is more developed in the southern portion. -
Beach Nourishment Effects Hald Beach - Denmark 1984
Beach nourishment effects Hald beach - Denmark 1984 July 2020 Project Building with Nature (EU-InterReg) Start date 01.11.2016 End date 01.04.2020 Project manager (PM) Ane Høiberg Nielsen Project leader (PL) Per Sørensen Project staff (PS) Henrik Vinge Karlsson Time registering 402412 Approved date 27.01.2020 Signature Report Analysis of the effect of a beach nourishment, Hald beach, Denmark Author Henrik Vinge Karlsson, Per Sørensen Keyword Beach nourishment, Coastal protection, Building with nature, Hald beach Distribution www.kyst.dk, www.buildingwithnature.com Referred to as Kystdirektoratet (2020), Beach nourishment effects – Hald Beach, Kystdirek- toratet, Lemvig. 2 Beach Nourishment Effects Contents 1 Introduction .............................................................................................................. 5 1.1 Objective ............................................................................................................................................................................... 6 1.2 Criteria’s for the nourishment stretch .....................................................................................................................7 1.3 Decision on nourishment stretch ..............................................................................................................................7 1.4 Financing of the beach nourishment ...................................................................................................................... 8 1.5 Definitions and term diagram ................................................................................................................................... -
Short Course on Principles and Applications of Beach Nourishment
Sediment storage at tidal inlets Item Type book_section Authors Mehta, Ashish J. Publisher University of Florida Coastal and Oceanographic Engineering Department Download date 02/10/2021 02:44:06 Link to Item http://hdl.handle.net/1834/18142 UFL/COEL - 89/002 SHORT COURSE ON PRINCIPLES AND APPLICATIONS OF BEACH NOURISHMENT February 21, 1989 * * Instructors * * Thomas Campbell Robert G. Dean Ashish J. Mehta Hsiang Wang S* Organized by * FLORIDA SHORE AND BEACH PRESERVATION ASSOCIATION DEPARTMENT OF COASTAL AND OCEANOGRAPHIC ENGINEERING. UNIVERSITY OF FLORIDA Short Course on Principles and Applications of Beach Nourishment February 21, 1989 Organized by Florida Shore and Beach Preservation Association Department of Coastal and Oceanographic Engineering, University of Forida Instructors Thomas Campbell Robert G.Dean Ashish J. Mehta Hsiang Wang Chapter 4 SEDIMENT STORAGE AT TIDAL INLETS Ashish J. Mehta Coastal and Oceanographic Engineering Department University of Florida, Gainesville INTRODUCTION Accumulation of sediment around tidal inlets has become a matter of renewed interest mainly for three reasons. The first of these is the need to estimate the shoal volumes, particularly in the ebb shoal, as a potential source of sediment for beach nourishment. Portions of the ebb shoal can be transferred to the beach provided there are no measurable adverse effects on navigation, or on the stability of the shoreline near the inlet. Such an operation, for example, has been carried out successfully at Redfish Pass, on the Gulf of Mexico coast of Florida (Olsen, 1979). A schematic example of a potential site for ebb shoal excavation and sand transfer to the downdrift beach is shown in Fig. -
Aeolian Sediment Transport and Natural Dune Development, Skodbjerge, Denmark
Aeolian Sediment Transport and Natural Dune Development, Skodbjerge, Denmark January 2020 Project Building with Nature (EU-InterReg) Start date 01.11.2016 End date 01.07.2020 Project manager (PM) Ane Høiberg Nielsen Project leader (PL) Per Sørensen Project staff (PS) Henrik Vinge Karlsson and Britt Gadsbølle Larsen Time registering 402412 Approved date 27.01.2020 Signature Report Aeolian sediment transport and natural dune development, Skodbjerge, Denmark. Author Henrik Vinge Karlsson and Britt Gadsbølle Larsen Keyword Aeolian sediment transport, Aeolian sedimentary budget, Skodbjerge, Dune development, Building with nature, Distribution www.kyst.dk, www.northsearegion.eu/building-with-nature/ Kystdirektoratet, BWN Krogen, 2018 Referred to as Kystdirektoratet (2020), Aeolian sediment transport and natural dune de- velopment, Skodbjerge, Denmark. Lemvig. 2 Aeolian Sediment Transport and Natural Dune Development, Skodbjerge, Denmark Abstract This study is part of the EU-InterReg project Building with Nature. The focus of this report is the natural development of a 3.7 km dune stretch at Skodbjerge located on the North Sea coast of Denmark. Since 2005, the designated study area has been subject to high-resolution digital elevation mappings (DEMs). The DEMs derive from LIDAR scans and serve as primary data resource throughout this report. Previous analyses of the coast assume that sediment accumulation inland of the dune top could be dis- regarded when analyzing the sedimentary budget of the coast, as the volumes in question were consi- dered insignificant. The analysis of this report suggests otherwise, as considerable amounts of sediment accumulated in the area leeward of the dune crest during the study period. Findings are based on the changes in elevation over time, obtained by analyzing the DEMs and thereby determining the sedimen- tary budget between dune face and dune leeside.