Depositional Sedimentary Environments with Reference to Terrigenous Clastics
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A Field Experiment on a Nourished Beach
CHAPTER 157 A Field Experiment on a Nourished Beach A.J. Fernandez* G. Gomez Pina * G. Cuena* J.L. Ramirez* Abstract The performance of a beach nourishment at" Playa de Castilla" (Huel- va, Spain) is evaluated by means of accurate beach profile surveys, vi- sual breaking wave information, buoy-measured wave data and sediment samples. The shoreline recession at the nourished beach due to "profile equilibration" and "spreading out" losses is discussed. The modified equi- librium profile curve proposed by Larson (1991) is shown to accurately describe the profiles with a grain size varying across-shore. The "spread- ing out" losses measured at " Playa de Castilla" are found to be less than predicted by spreading out formulations. The utilization of borrowed material substantially coarser than the native material is suggested as an explanation. 1 INTRODUCTION Fernandez et al. (1990) presented a case study of a sand bypass project at "Playa de Castilla" (Huelva, Spain) and the corresponding monitoring project, that was going to be undertaken. The Beach Nourishment Monitoring Project at the "Playa de Castilla" was begun over two years ago. The project is being *Direcci6n General de Costas. M.O.P.T, Madrid (Spain) 2043 2044 COASTAL ENGINEERING 1992 carried out to evaluate the performance of a beach fill and to establish effective strategies of coastal management and represents one of the most comprehensive monitoring projects that has been undertaken in Spain. This paper summa- rizes and discusses the data set for wave climate, beach profiles and sediment samples. 2 STUDY SITE & MONITORING PROGRAM Playa de Castilla, Fig. 1, is a sandy beach located on the South-West coast of Spain between the Guadiana and Gualdalquivir rivers. -
Different Pockmark Systems and Their Potential Importance for the Hydrological and Biogeochemical Balance of a Perialpine Lake
Different pockmark systems and their potential importance for the hydrological and biogeochemical balance of a perialpine lake Adeline N.Y. Cojean*, Maciej Bartosiewicz**, Jeremy Zimmermann*, Moritz F. Lehmann**, Katrina Kremer*** and Stefanie B. Wirth* * Centre for Hydrogeology and Geothermics, University of Neuchatel, Rue Emile-Argand 11, CH-2000 Neuchâtel ([email protected]) ** Department of Environmental Sciences, University of Basel, Bernoullistrasse 30, CH-4056 Basel ***Swiss Seismological Service (SED), ETH Zürich, Sonneggstrasse 5, CH-8006 Zürich Lacustrine pockmarks Ø Much less investigated than marine pockmark systems Ø Fluid-flow formation Ø CH4 gas ebullition => Lake Constance (Wessel 2010; Bussmann, 2011) Ø Groundwater discharge => Lake Neuchâtel (Reusch 2015; Wirth et al., in prep.) Pockmarks in Lake Thun, Switzerland Thun Lake Thun Tannmoos Fault gypsum carying bedrock Einigen Fault Zone Spiez Fabbri et al., 2017 Beatenberg Interlaken Research questions Thun Ø Are there more pockmarks in Lake Lake Thun Thun? Ø If yes, where are they? Ø What is their mechanism of formation? Spikes in electrical Taanmoos conductivity Ø What is their influence on the lake hydrological and biogeochemical Einigen budget? Fault Zone Beatenberg karst system Spiez Beatenberg Beaten Connected to Daerligen karst system Interlaken Intensive CH4 bubbling Different pockmarks systems in Lake Thun Thun Lake Thun Connection to karst system leads to groundwater discharge? Tannmoos Einigen Fault Zone Beatenberg karst system Spiez Beatenberg Beaten Daerligen -
The 1996 AD Delta Collapse and Large Turbidite in Lake Brienz ⁎ Stéphanie Girardclos A, , Oliver T
Marine Geology 241 (2007) 137–154 www.elsevier.com/locate/margeo The 1996 AD delta collapse and large turbidite in Lake Brienz ⁎ Stéphanie Girardclos a, , Oliver T. Schmidt b, Mike Sturm b, Daniel Ariztegui c, André Pugin c,1, Flavio S. Anselmetti a a Geological Institute-ETH Zurich, Universitätsstr. 16, CH-8092 Zürich, Switzerland b EAWAG, Überlandstrasse 133, CH-8600 Dübendorf, Switzerland c Section of Earth Sciences, Université de Genève, 13 rue des Maraîchers, CH-1205 Geneva, Switzerland Received 13 July 2006; received in revised form 15 March 2007; accepted 22 March 2007 Abstract In spring 1996 AD, the occurrence of a large mass-transport was detected by a series of events, which happened in Lake Brienz, Switzerland: turbidity increase and oxygen depletion in deep waters, release of an old corpse into surface waters and occurrence of a small tsunami-like wave. This mass-transport generated a large turbidite deposit, which is studied here by combining high- resolution seismic and sedimentary cores. This turbidite deposit correlates to a prominent onlapping unit in the seismic record. Attaining a maximum of 90 cm in thickness, it is longitudinally graded and thins out towards the end of the lake basin. Thickness distribution map shows that the turbidite extends over ∼8.5 km2 and has a total volume of 2.72⁎106 m3, which amounts to ∼8.7 yr of the lake's annual sediment input. It consists of normally graded sand to silt-sized sediment containing clasts of hemipelagic sediments, topped by a thin, white, clay-sized layer. The source area, the exact dating and the possible trigger of this turbidite deposit, as well as its flow mechanism and ecological impact are presented along with environmental data (river inflow, wind and lake-level measurements). -
USER MANUAL SWASH Version 7.01
SWASH USER MANUAL SWASH version 7.01 SWASH USER MANUAL by : TheSWASHteam mail address : Delft University of Technology Faculty of Civil Engineering and Geosciences Environmental Fluid Mechanics Section P.O. Box 5048 2600 GA Delft The Netherlands website : http://www.tudelft.nl/swash Copyright (c) 2010-2020 Delft University of Technology. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back- Cover Texts. A copy of the license is available at http://www.gnu.org/licenses/fdl.html#TOC1. iv Contents 1 About this manual 1 2 Generaldescriptionandinstructionsforuse 3 2.1 Introduction................................... 3 2.2 Background,featuresandapplications . ...... 3 2.2.1 Objectiveandcontext ......................... 3 2.2.2 Abird’s-eyeviewofSWASH. 4 2.2.3 ModelfeaturesandvalidityofSWASH . 7 2.2.4 Relation to Boussinesq-type wave models . .... 8 2.2.5 Relation to circulation and coastal flow models. ...... 9 2.3 Internal scenarios, shortcomings and coding bugs . ......... 9 2.4 Unitsandcoordinatesystems . 10 2.5 Choiceofgridsandtimewindows . .. 11 2.5.1 Introduction............................... 11 2.5.2 Computationalgridandtimewindow . 12 2.5.3 Inputgrid(s)andtimewindow(s) . 13 2.5.4 Input grid(s) for transport of constituents . ...... 14 2.5.5 Outputgrids .............................. 15 2.6 Boundaryconditions .............................. 16 2.7 Timeanddatenotation ............................ 17 2.8 Troubleshooting................................. 17 3 Input and output files 19 3.1 General ..................................... 19 3.2 Input/outputfacilities . .. 19 3.3 Printfileanderrormessages . .. 20 4 Description of commands 21 4.1 Listofavailablecommands. -
Human Impact on the Transport of Terrigenous and Anthropogenic Elements to Peri-Alpine Lakes (Switzerland) Over the Last Decades
Aquat Sci (2013) 75:413–424 DOI 10.1007/s00027-013-0287-6 Aquatic Sciences RESEARCH ARTICLE Human impact on the transport of terrigenous and anthropogenic elements to peri-alpine lakes (Switzerland) over the last decades Florian Thevenon • Stefanie B. Wirth • Marian Fujak • John Pote´ • Ste´phanie Girardclos Received: 22 August 2012 / Accepted: 6 February 2013 / Published online: 22 February 2013 Ó The Author(s) 2013. This article is published with open access at Springerlink.com Abstract Terrigenous (Sc, Fe, K, Mg, Al, Ti) and suspended sediment load at a regional scale. In fact, the anthropogenic (Pb and Cu) element fluxes were measured extensive river damming that occurred in the upstream in a new sediment core from Lake Biel (Switzerland) and watershed catchment (between ca. 1930 and 1950 and up to in previously well-documented cores from two upstream 2,300 m a.s.l.) and that significantly modified seasonal lakes (Lake Brienz and Lake Thun). These three large peri- suspended sediment loads and riverine water discharge alpine lakes are connected by the Aare River, which is the patterns to downstream lakes noticeably diminished the main tributary to the High Rhine River. Major and trace long-range transport of (fine) terrigenous particles by the element analysis of the sediment cores by inductively Aare River. Concerning the transport of anthropogenic coupled plasma mass spectrometry (ICP-MS) shows that pollutants, the lowest lead enrichment factors (EFs Pb) the site of Lake Brienz receives three times more terrige- were measured in the upstream course of the Aare River at nous elements than the two other studied sites, given by the the site of Lake Brienz, whereas the metal pollution was role of Lake Brienz as the first major sediment sink located highest in downstream Lake Biel, with the maximum val- in the foothills of the Alps. -
Constitution of an Automized Processing Chain to Analyse a Meris Time Series of Swiss Lakes
CONSTITUTION OF AN AUTOMIZED PROCESSING CHAIN TO ANALYSE A MERIS TIME SERIES OF SWISS LAKES Daniel Odermatt a, *, Thomas Heege b, Jens Nieke a, Mathias Kneubühler a and Klaus Itten a a Remote Sensing Laboratories (RSL), Dept. of Geography, University of Zurich, Winterthurerstrasse 190, CH-8050 Zurich, Switzerland - (dodermat, nieke, kneub, itten)@geo.unizh.ch b EOMAP GmbH & Co. KG, Sonderflughafen Oberpfaffenhofen, D-82205 Gilching, Germany - [email protected] KEY WORDS: Inland water, Case II water, lakes, MERIS, water constituents ABSTRACT: The physically based Modular Inversion & Processing System (MIP) is used in an automized processing chain for inland water constituent retrieval from MERIS level 1B data. Preprocessing routines are used to automatically convert the ESA generic data products into MIP input data format. Water/land masking, atmospheric correction and water constituent retrieval are accomplished by simple batch executables from MIP. The accuracy of the constituent retrieval mainly depends on the spectral fit between the image input data and the radiative transfer model results extracted from a database. Therefore, thresholds and initial values for model fitting have to account for all occurring lake specific temporal variations and need careful adjustment. 1. INTRODUCTION Heege, 2000), using the Modular Inversion & Processing System (MIP) (Heege and Fischer, 2004). Monitoring of water quality in lakes is required as an integral part of water resource management, in order to guarantee the In this work, a processing chain to automatically derive water sustainable use of water and to track the effects of constituents from MERIS level 1B data for Swiss lakes is built anthropogenic influences. Simultaneously, adequate monitoring around MIP. -
Coastal Landform Processes 29/03/2018 Do Now Copy Below: When Waves Lose Energy Material Is Deposited
Coastal Landform Processes 29/03/2018 Do Now Copy below: When waves lose energy material is deposited. This typical happens in sheltered areas such as bays, this explains why beaches are found here. Wave refraction is where the energy of the wave is reduced Aim ▪ To understand process acting on the coast that lead to landforms Wave energy converges on the headlands Wave energy is diverged Wave energy converges on the headlands Sediment moves and is deposited http://www.bbc.co.uk/education/cli ps/zsmb4wx Erosion Destructive waves will erode the coastline in four different ways: 1. Hydraulic Power Complete your 2. Corrasion erosion sheet 3. Attrition 4. Corrosion 5. Abrasion Longshore Drift • “Longshore drift is a process by which sediments such as sand or other materials are transported along a beach.” • The general direction of longshore drift around the coasts of the British Isles is controlled by the direction of the dominant wind. http://www.bbc.co.uk/learningzo ne/clips/the-coastline- longshore-drift-and- spits/3086.html Longshore Drift: A bird’s eye view Cliff Beach Sea Longshore Drift: A bird’s eye view Cliff Eroded material Beach from the cliffs is left on the beach Bob the pebble Sea Longshore Drift: A bird’s eye view Cliff Beach Waves The waves from the sea come onto the beach at an angle and pick Bob and other material up and move them up the beach. Sea Longshore Drift: A bird’s eye view Cliff Beach Swash This movement of the waves is called SWASH. The waves come in at an angle due to Sea wind direction Longshore Drift: A bird’s eye view Cliff Beach The waves then move back down the beach in a straight Swash direction due to gravity. -
3.2.6. Methods for Field Measurement and Remote Sensing of the Swash Zone
© Author(s) 2014. CC Attribution 4.0 License. ISSN 2047-0371 3.2.6. Methods for field measurement and remote sensing of the swash zone Sebastian J. Pitman1 1 Ocean and Earth Sciences, National Oceanography Centre, University of Southampton ([email protected]) ABSTRACT: Swash action is the dominant process responsible for the cross-shore exchange of sediment between the subaerial and subaqueous zones, with a significant part of the littoral drift also taking place as a result of swash motions. The swash zone is the area of the beach between the inner surfzone and backbeach that is intermittently submerged and exposed by the processes of wave uprush and backwash. Given the dominant role that swash plays in the morphological evolution of a beach, it is important to understand and quantify the main processes. The extent of swash (horizontally and vertically), current velocities and suspended sediment concentrations are all parameters of interest in the study of swash processes. In situ methods of measurements in this energetic zone were instrumental in developing early understanding of swash processes, however, the field has experienced a shift towards remote sensing methods. This article outlines the emergence of high precision technologies such as video imaging and LIDAR (light detection and ranging) for the study of swash processes. Furthermore, the applicability of these methods to large-scale datasets for quantitative analysis is demonstrated. KEYWORDS: run-up, morphodynamics, coastal imaging, video, LIDAR. Introduction al., 2004) and its dominant responses are largely well understood. It is the most The beachface is a highly spatially and energetic zone in terms of bed sediment temporally dynamic zone, predominantly due movement and is characterised by strong and to swash processes such as wave run up. -
Sand-Gravel Marine Deposits and Grain-Size Properties
GRAVEL ISSN 1678-5975 Novembro - 2005 Nº 3 59-70 Porto Alegre Sand-Gravel Marine Deposits and Grain-Size Properties L. R. Martins1,2 & E. G. Barboza2 1 COMAR- South West Atlantic Coastal and Marine Geology Group; 2 Centro de Estudos de Geologia Costeira e Oceânica – CECO/IG/UFRGS. RESUMO A plataforma continental Atlântica do Rio Grande do Sul e Uruguai foi utilizada como laboratório natural para testar as relações entre propriedades de tamanho de grão e ambiente sedimentar. A evolução Pleistoceno/Holoceno da região foi intensamente estudada através de um mapeamento detalhado, e de estudos sedimentológicos e estratigráficos, oferecendo, dessa forma, uma excelente oportunidade para esse tipo de trabalho. Acumulações de areia e cascalho, vinculadas a níveis de estabilização identificados da transgressão Holocênica, localizados nas isóbatas de 110-120 e 20-30 metros, fornecem elementos confiáveis relacionados com a fonte, transporte e nível de energia de deposição e podem ser utilizados como linhas de evidencias na interpretação ambiental. ABSTRACT The Atlantic Rio Grande do Sul (Brazil) and Uruguay inner continental shelf was used as a natural laboratory to test the relationship between grain-size properties and sedimentary environment. The Pleistocene/Holocene evolution of the region was intensively studied through detailed mapping, sedimentological and stratigraphic research thus offering an excellent opportunity of developing this type of work. Sand and gravel deposits linked with identified stillstands of the Holocene transgression located at 110-120 and 20-30 meters isobath provided elements related to the source, transport and depositional energy level and can be used as a tool for environmental interpretation. Keywords: marine deposits, grain-size, sand-gravel, Holocene. -
Subaquatic Slope Instabilities: the Aftermath of River Correction And
1 1 Subaquatic slope instabilities: The aftermath of river correction and 2 artificial dumps in Lake Biel (Switzerland) 3 4 Nathalie Dubois1,2, Love Råman Vinnå 3,5, Marvin Rabold1, Michael Hilbe4, Flavio S. 5 Anselmetti4, Alfred Wüest3,5, Laetitia Meuriot1, Alice Jeannet6,7, Stéphanie 6 Girardclos6,7 7 8 1 Eawag, Swiss Federal Institute of Aquatic Science and Technology, Department of 9 Surface Waters – Research and Management, Dübendorf, Switzerland 10 2 Department of Earth Sciences, ETHZ, Zürich, Switzerland 11 3 Physics of Aquatic Systems Laboratory, Margaretha Kamprad Chair, École 12 Polytechnique Fédérale de Lausanne, Institute of Environmental Engineering, 13 Lausanne, Switzerland 14 4 Institute of Geological Sciences and Oeschger Centre for Climate Change Research, 15 University of Bern, Bern, Switzerland 16 5 Eawag, Swiss Federal Institute of Aquatic Science and Technology, Department of 17 Surface Waters - Research and Management, Kastanienbaum, Switzerland 18 6 Department of Earth Sciences, University of Geneva, Geneva, Switzerland 19 7 Institute for Environmental Sciences, University of Geneva, Geneva, Switzerland 20 21 Corresponding author: Nathalie Dubois, [email protected] 22 23 Associate Editor – Fabrizio Felletti 24 Short Title – Mass transport events linked to river correction 25 This document is the accepted manuscript version of the following article: Dubois, N., Råman Vinnå, L., Rabold, M., Hilbe, M., Anselmetti, F. S., Wüest, A., … Girardclos, S. (2019). Subaquatic slope instabilities: the aftermath of river correction and artificial dumps in Lake Biel (Switzerland). Sedimentology. https://doi.org/10.1111/sed.12669 2 26 ABSTRACT 27 River engineering projects are developing rapidly across the globe, drastically 28 modifying water courses and sediment transfer. -
Under Pressure Coastal Stack & Stump: Sediment Are Thrown Against Weathering (Freeze- the Cliffs by Waves
Tides: UP1 –Waves & Tides Constructive Waves: Longshore Drift: Transportation: • These are the rise and fall of the sea level, due • Traction: mainly to the pull of the moon • Strong swash and weak backwash that • Waves approach the beach at an angle due Large boulders and sediments • As the moon travels around the Earth, it push sand and pebbles up the beach to the prevailing wind direction are rolled along the sea bed. attracts the sea and pulls it upwards. The sun • Low waves with longer gaps between the • As the wave breaks, the swash carries They are too heavy to be helps too – but its much further away. So its crests (6-8 per min – low frequency) material up the beach at the same angle pull is not as strong. • Under 1m (oblique angle) as the prevailing wind picked up fully by the waves. • High tide occurs about every 12 and ½ hours, • Known as spilling waves as they ‘spill’ up • The backwash carries material back down with low tides in between. The difference the beach the beach at a right angle (90o) due to • Saltation: between the high and low tide is called the tidal • Gently sloping wave front gravity where small pieces of shingle range • Formed by storms often 100s KMs away • This means that material is moved along the or large sand grains are • Gentle beach beach in a zig zag route bounced along the sea bed. Waves: Destructive Waves: • Suspension: • Are formed by wind that blows over the sea, friction with the surface of water causes • Weak swash and strong backwash pulling small particles such as silts ripples to form and these develop into waves. -
Switzerland Vacation
Switzerland Vacation Bruce McKay www.Travel-Pix.ca Switzerland Vacation Contents Contents 2 Introduction 3 Maps 4 Welcome 6 Interlaken 9 Harder Kulm 11 Lauterbrunnen 17 Murren 27 Lake Brienz 36 Schynige Platte 44 Lake Thun 46 Rain Day 50 Zurich 54 Lake Zurich 56 Switzerland Vacation Introduction After I first visited Switzerland and had a great time I often told friends it was a place I'd love to revisit. An opportunity for that arose when I booked on for the European Castles Tours "Three Corners of Europe – Black Forest, Alsace and Switzerland". That tour was designed for air travel to and from Zurich, so there was an easy way to add an extension of my own. The last full day of the tour was at Lucerne, and I was able to plan my extension starting there. I didn't want to repeat everything I'd done before, but I did know there was a magic region where I'd love to spend some more time. The Bernese Oberland in central Switzerland extends south into the Bernese Alps. Its mixture of mountains, lakes, and valleys has made it very popular, not only for sightseeing but also for hiking and active sports, both winter and summer. I visited the most famous sites on an earlier tour. This was a more relaxed visit. I stayed in Interlaken, the regional transportation hub, and made day excursions from there. The photos from my longer tour are in the Switzerland-1 and -2 PDFs, and the ones from the first part of this trip are on the "Three Corners" page.