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• 22:42, 7 November 2024 Dronkers J (talk | contribs) uploaded a new version of File:SlopingSeabed.jpg (Sloping seabed; definition of the axes.)
• 22:35, 7 November 2024 Dronkers J (talk | contribs) uploaded File:SlopingSeabed.jpg (Sloping seabed; definition of the axes.)
• 20:22, 7 November 2024 Dronkers J (talk | contribs) uploaded File:EdgeWaveRefraction.jpg (Wave ray of incoming and reflected wave crest (red) and wave ray of incoming wave trough (black line). The edge wave is trapped in a coastal strip of width <math>x_c</math>.)
• 20:18, 7 November 2024 Dronkers J (talk | contribs) uploaded a new version of File:EdgeWave.jpg (Principle of wave trapping to the shore by wave refraction and reflection. The wave crest is shown in red at successive times (from left to right), black arrows indicate the wave propagation speed and the dotted line displays the wave ray.)
• 22:09, 2 November 2024 Dronkers J (talk | contribs) uploaded File:SeawallNoSeawall.jpg (A seawall stops shoreline retreat but the beach is lost. Without seawall, the beach is preserved but land is lost (Ruggiero, 2010). Photo credit Chip Fletcher (Hawaii).)
• 22:08, 2 November 2024 Dronkers J (talk | contribs) deleted page File:SeawallNoSeawall.jpg
• 21:44, 2 November 2024 Dronkers J (talk | contribs) uploaded File:SeawallNoSeawall.jpg (A seawall stops shoreline retreat but the beach is lost. Without seawall, the beach is preserved but land is lost (Ruggiero, 2010). Photo credit Chip Fletcher (Hawaii).)
• 22:51, 30 October 2024 Dronkers J (talk | contribs) uploaded File:WaveTransmissionLCB.jpg (Wave transmission over a low-crested breakwater and mathematical symbols.)
• 22:46, 30 October 2024 Dronkers J (talk | contribs) uploaded File:WaveTransmission.jpg (Wave transmission over a low-crested breakwater and mathematical symbols.)
• 22:45, 30 October 2024 Dronkers J (talk | contribs) deleted page File:WaveTransmission.jpg
• 22:44, 30 October 2024 Dronkers J (talk | contribs) uploaded File:WaveTransmission.jpg (Wave transmission over a low-crested breakwater and mathematical symbols.)
• 22:43, 30 October 2024 Dronkers J (talk | contribs) deleted page File:WaveTransmission.jpg
• 22:42, 30 October 2024 Dronkers J (talk | contribs) deleted page File:WaveTransmission.jpg (Deleted old revision 20241030214134!WaveTransmission.jpg)
• 22:41, 30 October 2024 Dronkers J (talk | contribs) uploaded a new version of File:WaveTransmission.jpg (Reverted to version as of 23:03, 15 May 2023 (CEST))
• 20:44, 30 October 2024 Dronkers J (talk | contribs) uploaded a new version of File:WaveTransmission.jpg (Wave transmission over an oyster reef and mathematical symbols. The freeboard <math>R_c</math> is negative when the reef crest is below the still water level <math>SWL</math>.)
• 17:42, 30 October 2024 Dronkers J (talk | contribs) uploaded a new version of File:WaveTransmissionEasternScheldtOysterReef.jpg (Comparison of Eq. (1) (red dashed line) with the wave transmission coefficient measured (blue/green/yellow dots[10]) on an oyster reef in the Eastern Scheldt (Netherlands). Insert: Average cross-shore shape of the oyster reef.)
• 17:07, 30 October 2024 Dronkers J (talk | contribs) uploaded File:WaveReefTransmission.jpg (Wave transmission over an oyster reef and mathematical symbols. The freeboard <math>R_c</math> is negative when the reef crest is below the still water level <math>SWL</math>.)
• 09:30, 15 October 2024 Dronkers J (talk | contribs) uploaded File:SkewWaveTransport.jpg (Horizontal wave orbital velocity <math>U</math> and sediment transport <math>Q</math> averaged over the ripple length for acceleration-skewed waves, velocity-skewed waves and acceleration+velocity-skewed waves. Adapted from Salimi-Tarazouj, A., Tian-Ji...)
• 15:53, 13 October 2024 Dronkers J (talk | contribs) uploaded File:SandwavesNorthSea.jpg (Sand waves in the southern North Sea (insert upper left corner, black dot, depth 35-40 m), imaged by multibeam sonar. An indication of the order of magnitude of the wavelength of the sand waves (ca. 100 m) is given by the shipwreck of the freighter Tim...)
• 19:12, 12 October 2024 Dronkers J (talk | contribs) uploaded File:RotationDamp.jpg (Variation of the ratio <math>|\Psi^+/\Psi^|</math> over the vertical, showing that the anticyclonic velocity component <math>\Psi^-</math> is more strongly damped than the cyclonic component <math>\Psi^+<\math>.)
• 10:14, 7 October 2024 Dronkers J (talk | contribs) uploaded File:SeawaterIntrusion3.jpg (Schematic representation of seawater intrusion into a multi-aquifer system.)
• 10:11, 1 October 2024 Dronkers J (talk | contribs) uploaded a new version of File:WindTurbinePileDriving.jpg (Pile driving for the installation of an offshore wind turbine. Source https://www.deingenieur.nl/)
• 09:35, 1 October 2024 Dronkers J (talk | contribs) uploaded File:WindTurbinePileDriving.jpg (Pile driving for the installation of an offshore wind turbine. Photo credit https://www.tudelftcampus.nl/)
• 10:46, 21 September 2024 Dronkers J (talk | contribs) uploaded a new version of File:PCB.jpg (Molecular structure polychlorinated biphenyl (PCB).)
• 10:44, 21 September 2024 Dronkers J (talk | contribs) uploaded File:Tributyltin.jpg (Molecular structure tributyltin (TBT).)
• 10:10, 21 September 2024 Dronkers J (talk | contribs) uploaded File:EutrophicationZostera.jpg (Overgrown Zostera in the Baltic Sea. Photo credit Metsähallitus. Creative Commons Licence CC BY-SA 2.0)
• 15:16, 14 September 2024 Dronkers J (talk | contribs) uploaded File:Exchange fluxes mixing.jpg (Exchange fluxes mixed salt-fresh interface)
• 12:55, 14 September 2024 Dronkers J (talk | contribs) uploaded File:GroundwaterTracer.jpg (Determination of submarine groundwater discharge by measuring tracer concentrations <math>c(x)</math>.)
• 19:16, 10 September 2024 Dronkers J (talk | contribs) uploaded File:TurtlePlasticIngest.jpg (Sea turtle eating a plastic bag. Image from https://tontoton.com/how-does-ocean-plastic-affect-marine-wildlife/#)
• 18:46, 10 September 2024 Dronkers J (talk | contribs) uploaded File:PlasticGarbageBeach.jpg (Beach covered with plastic garbage. Photo credit: Mel D Cole/World Bank)
• 18:45, 10 September 2024 Dronkers J (talk | contribs) uploaded File:EntangledTurtle.jpg (A green sea turtle is entangled in an abandoned fishing net. Image courtesy of Doug Helton, NOAA. Wikimedia commons)
• 21:14, 5 September 2024 Dronkers J (talk | contribs) uploaded File:TankerSpillStats23.jpg (Quantities of oil spilled from tanker incidents 1970-2023. From ITOPF website https://www.itopf.org/knowledge-resources/data-statistics/statistics/)
• 21:12, 5 September 2024 Dronkers J (talk | contribs) deleted page File:TankerSpillStats23.jpg .jpg
• 21:11, 5 September 2024 Dronkers J (talk | contribs) uploaded File:TankerSpillStats23.jpg .jpg (Quantities of oil spilled from tanker incidents 1970-2023. From https://www.itopf.org/knowledge-resources/data-statistics/statistics/)
• 22:06, 31 August 2024 Dronkers J (talk | contribs) deleted page How to explore science capacity (content was: "==Bibliographic search== This task aims at performing a bibliographic compilation of key coastal zone management publications with links also to maritime activities, planning, and conflicts within the limits of the territorial waters...")
• 09:08, 31 August 2024 Dronkers J (talk | contribs) uploaded File:SeabedRipples.jpg (Seabed ripples. Photo credit Julia Harwood.)
• 12:31, 30 August 2024 Dronkers J (talk | contribs) uploaded a new version of File:PhaseLead.jpg (The phase lead angle <math>\phi</math> of the bed shear stress relative to the bed perturbation as a function of <math>k \, d_{50}</math>. Figure adapted from Charru et al. (2013<ref name=C13/>).)
• 11:37, 30 August 2024 Dronkers J (talk | contribs) uploaded File:PhaseLead.jpg (The phase lead angle <math>\phi</math> of the bed shear stress relative to the bed perturbation as a function of <math>k \, d_{50}</math>. Figure adapted from Charru et al. (2013<ref name=C13/>).)
• 19:02, 22 August 2024 Dronkers J (talk | contribs) uploaded File:Bedform7.jpg (If oscillating flow is assumed to be equivalent to successive periods of steady flow from the right and from the left, then the net resulting flow pattern consists of circulation cells that move sediment grains from the troughs to the crests.)
• 19:00, 22 August 2024 Dronkers J (talk | contribs) uploaded File:Bedform6.jpg (Flow pattern adjusted to a bed perturbation similar as in Fig. 5, but with the flow direction reversed.)
• 18:58, 22 August 2024 Dronkers J (talk | contribs) uploaded File:Bedform5.jpg (The negative vorticity balance on the upstream side of the ripple drives a counterclockwise circulation, while the positive balance on the downstream side drives a clockwise circulation.)
• 18:29, 22 August 2024 Dronkers J (talk | contribs) uploaded File:Bedform4.jpg (Transport of vorticity (rotational component of velocity) at the ripple trough and ripple crest.)
• 18:29, 22 August 2024 Dronkers J (talk | contribs) uploaded File:Bedform3.jpg (The velocity profiles at the ripple trough and the ripple crest corresponding to the contraction-divergence of the streamlines.)
• 18:27, 22 August 2024 Dronkers J (talk | contribs) uploaded File:Bedform2.jpg (The emerging ripple is eroded where the shear stress increases due to contraction of the streamline toward the sediment bed. Accretion occurs where streamlines diverge from the sediment bed. The erosion-accretion boundary is shifted by the saturation l...)
• 18:26, 22 August 2024 Dronkers J (talk | contribs) uploaded File:Bedform1.jpg (Steady flow streamlines over an emerging bed ripple in a vertical longitudinal section.)
• 10:17, 12 August 2024 Dronkers J (talk | contribs) uploaded a new version of File:WaveAngles.jpg (Wave incidence angles in a 1-line model where the breaker contour line is parallel to the shoreline.)
• 20:11, 10 August 2024 Dronkers J (talk | contribs) deleted page Impacts from maritime transport (content was: "Impacts from from oil spills on coastal zones often regard losses of biodiversity, of environmental quality or of other non-use or passive-use values, which are difficult to estimate with traditional techniques and concepts o...")
• 10:18, 9 August 2024 Dronkers J (talk | contribs) uploaded File:BumpheadParrotfish JennyHuang.jpg (Bumphead parrotfish. Parrotfish contribute to bioerosion by rasping algae from coral and other rocky substrates with their teeth tightly packed on the external surface of their jaw bones. For example, parrotfish grazing accounted for the production of...)
• 19:39, 3 August 2024 Dronkers J (talk | contribs) uploaded File:NileDeltaDuneFences.jpg (Dune development with sand fences for coastal protection (Egypt, 2022). Green Climate Fund project “Enhancing Climate Change Adaptation in the North Coast and Nile Delta Regions”.)
• 16:00, 3 August 2024 Dronkers J (talk | contribs) uploaded a new version of File:ChadwickFig2a.jpg (Wave transformations at Bigbury bay, Devon, England. Photograph courtesy of Dr S M White.)

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