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Coast and ocean collective
Home
Research
  • Hydrodynamics
  • Morphodynamics
  • Coastal Hazards
Resources
  • Education
  • Data
  • Books
  • Educational Kids Videos
  • Coast2Coast
  • RCEM 2021
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    • Hydrodynamics
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Coast2Coast Zoominars

  The Coast2Coast zoominar series  started during the May 2020 covid lockdown as a way of  facilitating networking and interactions between researchers in a year  when conferences and travelling were not going to happen.  The Coast2Coast has quickly grown to become a prestigious seminar series with  presenters from many parts of the world. 


Giovanni Coco (University of Auckland), Kristen Splinter and Mitch  Harley (University of New South Wales), Ana Vila-Concejo (University of  Sydney), and Ryan Lowe (University of Western Australia) are the hosts  of Coast2Coast... at least for now!  


C2C#32 Jak McCarroll and Nicolas Pucino

 Victorian costal monitoring programme

   The presentation describes the regular beach surveys at over 20 sites, combined with a statewide network of wave buoys, extensive bathymetric surveys and integrated numerical modelling. At the core of the program is a first-of-its-kind, Eureka prize winning, citizen science led, drone-based beach surveying program. Check out VCMP StoryMaps: https://bit.ly/38gyiZi   

C2C#31 Maarten Kleinhans (Utrecht University)

  What determines estuary planform shape, size and channel-bar patterns?

   Is there such a thing as an equilibrium or are multiple states possible under the same boundary conditions? In this presentation Maarten will show results of his work to address these questions. The tools are the usual combination of field data and numerical  modelling, but also his group’s experiments in the unique Metronome tidal  flume where they create entire estuaries with live vegetation.  

C2C#30 Robbi Bishop-Taylor (Geoscience Australia)

   Time and Tide: Mapping Australia's dynamic coastal zone through time and space using Digital Earth Australia  

 This talk will showcase how new and innovative analysis techniques can be applied to petabytes of DEA satellite data to better understand and monitor Australia’s vast coastal zone from space: from using the rise and fall of the tide to map the 3D shape of Australia’s coast, to tracking how our coastline has shifted and changed over the past three decades in unprecedented scale and detail. 

C2C#29 Matt Blacka (University of New South Wales, Australia)

  Life on the Reef -  examining the interactions   

 this presentation investigates the fascinating interaction between tidal  fluctuations and wave characteristics on the lagoon hydrodynamics. The  analysis was based on several months of intense hydrodynamic field data  collection including bathy-topo surveys, current metering, wave and  water level gauging.  

C2C#28 Meagan Wengrove (Oregon State University, USA)

 BEACH DUNE SUBSURFACE HYDRODYNAMIS AND THE FORMATION OF DUNE SCARPS  

We carried out a 1:2.5 scale beach dune erosion experiment to  study the subsurface hydrodynamics involved in scarp formation.  Measurements of the subsurface hydrodynamics and external forcing of the  prototype dune were collected in the NSF NHERI O.H. Hinsdale Wave  Research Laboratory Large Wave Flume at Oregon State University.    

C2C#27 Itxaso Oderiz (UNAM, Mexico)

  Global wave climate frameworks for the near and far future   

 We discuss global wave climate types and how they are driven  by the pressure and planetary wind systems. We will analyse the signals  of natural variability and global warming on these wave climates over  the last 35 years. In addition, we will discuss how these wave climates  are interconnected across the oceans. Finally, we will evaluate changes  of these wave climates for the next century, under the climate change  scenario RCP 8.5.   

C2C#26 Robin Davidson Arnott ( University of Guelph, Canada)

 Controls on the geomorphic response of beach-dune systems to water level  rise  

This presentation offers a synthesis of the disparate evidence on the  importance of the magnitude and duration of water level rise in both  lacustrine and marine environments in relation to other long term  controls on the coastal response (e.g., wind climatology, vegetation  growth, geological context). 

C2C#25 Gene Rankey (University of Kansas, USA)

 Things that make you go “hmmm...” Testing geological concepts using numerical hydrodynamic process models  

 The purpose of this presentation is to start a discussion regarding two  conceptual paradigms prominent in sedimentary geology: 1) that unfilled  atoll lagoons represent a transient state, destined to be filled by  debris from their annular reef, and 2) that “fair-weather wave base” and  “storm wave base” represent consistent, objectively definable datums  for facies and stratigraphic interpretation.  Simple numerical  hydrodynamic simulation models reveal several insights that cast doubt  on the plausibility of these paradigms, in stark contrast with their  widespread application in stratigraphic interpretations. 

C2C#24 Shari Gallop (University of Waikato, NZ)

 The science of returning freshwater to estuaries 

 In this talk, I will discuss estuarine restoration attempts by returning  freshwater inflows, with a focus on the current Aotearoa New Zealand  example of Te Awa o Ngātoroirangi (the Maketū Estuary). Here, the major  freshwater source (the Kaituna River) has been partially returned to the  estuary over the past year, after being diverted out in 1956.  

 ***Please note we were zoombombed so there is an interruption about 12.5 minutes into the video*** 

C2C#23 Dano Roelvink ( IHE Delft / Deltares, The Netherlands)

 Predicting future coastal behaviour: can we do it? 

In this talk Dano Roelvink will take you through principles of modelling  coastal hydrodynamics and morphology, highlight some new model  developments and then will discuss what we can and cannot do when asked  to provide predictions of coastal behaviour in 2100. 

C2C#22 Julia Fiedler ( Scripps Institute of Oceanography, USA)

 Wave runup, forecasting, and enhanced observations with a drone-mounted  LiDAR.

 Extreme runup estimates may be improved, relative to  predictions from general empirical formulae with default parameter  values, by using historical storm waves and eroded profiles in numerical  runup simulations. For use in a local flood warning system, the  relationship between incident wave energy spectra E(f) and SWASH-modeled  shoreline water levels is approximated with the numerically simple  integrated power law approximation (IPA), wherein broad and multi-peaked  E(f) are accommodated by characterizing wave forcing with  frequency-weighted integrals of E(f). Work to integrate uncertainties  and improve and expand the flood warning system is ongoing. 

C2C#21 Patrick Hesp ( Flinders University, Australia)

 Initiation of Coastal Transgressive Sand Sheets and Dunefields   Transgressive aeolian sand sheets and dunefields are coastal aeolian  sand deposits formed by the downwind or across- and/or alongshore  movement of sand over landward terrain. Transgressive aeolian sand sheets may be  flat to undulating with minimal dunes, or slipface-less dunes on the  surface, whilst transgressive dunefields are characterised by various  types of dunes (e.g. barchans, barchanoid and transverse dunes). This talk  will examine and critique the known triggers or initiation mechanisms of  transgressive sand sheets and dunefields, and explore very recent  evidence of the formation of new ones on the SE South Australian coast. 

C2C#20 Mandi Thran (University of New South Wales, Australia)

 Numerical simulations of along-slope, down-slope, and cross-shelf flows  on passive margins   

The hydrodynamic and sedimentary processes that operate on submerged  passive continental margins are often difficult to study due to their  remoteness and the sparse data coverage associated with these regions.  Numerical simulations provide a powerful experimental framework to  investigate such physical processes. This talk will cover “three short  stories” of a variety of numerical models used to provide process-based  insights into the regional-scale hydrodynamic and sedimentary  consequences of margin flows.  

C2C#19 Peter Ruggiero (Oregon State University, USA)

 Combining a stochastic climate emulator with surrogate models of dynamic coastal simulators to drive coastal hazards impacts research   

 This talk will primarily focus on an application of efficient hybrid statistical-dynamical framework to probabilistically  explore coastal flood impacts along both the oceanside and bayside of  San Diego, CA. 

C2C#18 Mitch Harley ( University of New South Wales, Australia)

   CoastSnap

Dr Mitch Harley from the Water Research Laboratory at the University of New South Wales in Australia will tell us about CoastSnap App,  the new citizen science App to monitor your local beach using your  mobile. Make sure you download it and start using it before the zoominar  so you can ask Mitch directly all your questions! 

C2C#17 Karin Bryan (University of Waikato, NZ)

 Building new land to hold the line on sea-level rise: the interactions between mangroves, bed properties and hydrodynamics 

 Despite expanding invasively locally, mangroves are declining worldwide,  substantially depleting one of the world’s most effective carbon-burial  ecosystems. Mangroves spread seaward by establishing seedlings and  roots, which alter the hydrodynamics and ultimately change the way in  which sediment is deposited and morphology changes. This talk will summarise our recent work on mangroves and their  role in building intertidal land. 

C2C#16 Ryan Lowe ( University of Western Australia, Australia)

  Wave transformation through reef surf zones  

 This  presentation will summarise recent research designed to elucidate how  incident wind-wave energy is transformed across reefs, becomes converted  to other energy forms via nonlinear energy transfers, and ultimately is  dissipated by a combination of wave breaking and bottom friction. An  overview of recent results from field, laboratory and numerical  modelling studies will be presented, with a particular focus on the  dynamics of the energetic surf zone region where plunging wave breaking  occurs. 

C2C#15 Melanie Biausque ( University of Ulster, Northern Ireland)

 Multiple intertidal bars on beaches  

 To date, a  detailed understanding of the formation of MITB has remained elusive and  their precise definition is still unclear. It has been suggested that  MITB features are the result of both swash and surf zone processes  acting on the intertidal beach profile. These processes are involved in  the formation, the long-term persistence, and behaviour of MITB. 

C2C#14 Ben Hague ( Bureau of Metereology, Australia)

 The Search for Australia's Next Top Coastal Flood Zone  

 In this  talk Ben will discuss how his work on defining impact-based thresholds  for coastal inundation has progressed research on some of these  questions, with a focus on Sydney, New South Wales, including: - How can we define impact-based metrics for coastal flood monitoring? - How frequently does coastal flooding occur around Australia? - How is sea level rise affecting coastal flooding? - When will frequent flooding (e.g. weekly, daily) occur under various  sea level rise scenarios? 

C2C#13 Mike Kinsela ( NSW Government, Australia)

 Mapping the shoreface: geomorphology, sediments, the active zone and  system feedback. Which will control future coastal change, and when? 

 - What do seabed geomorphology and sediment distributions tell us about sediment budgets and shoreline behaviour? 

- Identifying the shoreface ‘active zone’ and ‘morphodynamic state’ – response timescales and feedback processes 

- Which aspects of the coupled beach-shoreface system will influence future shoreline response to sea-level rise? 

C2C#12 Amaia Ruiz de Alegría-Arzaburu (UABC, Mexico)

 Subaerial and subtidal sand exchange at a swell dominated beach on seasonal and interannual scales  

  • How much sand is transported between the subaerial and subtidal beach on a seasonal scale?
  •  How did the beach respond to the highly energetic El Niño 2015-16 winter?
  •  Which are the mechanisms of the beach to return the sand volume to the subaerial beach?
  •  Details on the total sediment budget willbe provided.

C2C#11 Oscar Ferreira (University of Algarve, Portugal)

Assessment of risk reduction measures to minimise the impacts of storms at sandy shores

Coastal  storms often cause damages and losses in occupied areas. This  presentation focus on the assessment, trough modelling and field  validation, of disaster risk reduction measures at sandy shores. The  proposed methodology is adaptable to any coastal region and can be used  to test (and improve) management options at a broad number of coastal  areas, helping to optimise implementation costs while reducing the risk  to the occupation and people.

C2C#10 Yoshi Kuriyama ( National Institute of Maritime, Port and Aviation Technology, Japan) )

 Simulation of volume change in the backshore at Hasaki, Japan

A  one-dimensional model is developed and applied to the Hasaki Coast in  Japan to predict changes in backshore volume. The model is calibrated and validated using beach profile data obtained weekly at the Hasaki Coast over a 28-year  period from 1987 to 2014. The validation suggests that the model can  reasonably reproduce the cumulative volume change, but it underestimates the  time-varying fluctuations of the weekly averaged volume change rate.

C2C#09Jak McCarroll ( University of Plymouth, UK)

 Can transport from the lower shoreface save beaches from SLR?   

 

  • What are the components of a ‘total sediment budget’ for a wave-dominated beach? 
  • How important are sediment fluxes with the lower shoreface such as headland bypassing, deep onshore transport and mega-rips? 


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