Uploads by Dronkers J
This special page shows all uploaded files.
| Date | Name | Thumbnail | Size | Description | Versions |
|---|---|---|---|---|---|
| 13:53, 9 November 2026 | HarborSiltation.jpg (file) | Error creating thumbnail: File missing |
111 KB | Zero-order mass balance for harbor siltation | 1 |
| 20:52, 8 November 2026 | ChannelStress.jpg (file) | Error creating thumbnail: File missing |
27 KB | Ratio of maximum wave-induced bed shear stresses on the channel bed and in the surrounding waters as a function of relative channel depth. | 1 |
| 16:04, 8 November 2026 | DistributionNonLinearWaves3.jpg (file) | Error creating thumbnail: File missing |
47 KB | The probability density distribution <math>p(\zeta)</math> (purple) including kurtosis <math>\kappa=0.2</math>. | 1 |
| 15:58, 6 November 2026 | CuspScheme.jpg (file) | Error creating thumbnail: File missing |
165 KB | Schematic representation of a beach cusp with wave uprush and downrush. | 1 |
| 11:03, 31 October 2026 | EnergyFluxBreakerLine.jpg (file) | Error creating thumbnail: File missing |
57 KB | The longshore component of the wave energy flux trough the breaker depth contour per unit contour length is given by <math>F \cos\alpha \sin\alpha</math>. | 1 |
| 20:24, 27 October 2026 | MassMomentumBalance.jpg (file) |  |
40 KB | Derivation of the 1D momentum and mass balance equations. | 1 |
| 21:18, 24 October 2026 | WaveTheoryLimits.jpg (file) |  |
58 KB | Validity domain of theoretical wave descriptions. | 1 |
| 21:03, 22 October 2026 | EcosystemFunctionsValues.jpg (file) |  |
79 KB | Relationships between coastal zone functions, the benefits and opportunities they provide, and the categories of Total Economic Value. | 1 |
| 10:28, 2 October 2026 | RegressionTree.jpg (file) |  |
72 KB | Example of a regression tree predicting wave height from wind speed and wind direction. | 1 |
| 18:41, 30 September 2026 | MCAsmall.jpg (file) |  |
51 KB | MCA diagram with 3 options and 3 criteria. | 1 |
| 15:06, 21 September 2026 | PurpleMarshCrab.jpg (file) |  |
152 KB | Purple salt marsh crab ''Sesarma reticulatum''. Courtesy [https://nantucketconservation.org/2015/12/22/salt-marsh-dieback-and-the-purple-marsh-crab-on-nantucket/ Nantucket Conservation Foundation]. | 1 |
| 21:14, 6 September 2026 | PosidoniaFlumeWaveDamping.jpg (file) |  |
197 KB | Investigation of wave damping by Posidonia seagrass in a wave flume expriment at the Universitat Politecnica de Catalunya, Barcelona, Spain. | 1 |
| 08:39, 6 September 2026 | PosidoniaWaveDampingFlume.jpg (file) |  |
132 KB | Investigation of wave damping by Posidonia seagrass in a wave flume expriment at the Universitat Politecnica de Catalunya, Barcelona, Spain. https://www.upc.edu/es/sala-de-prensa/noticias/posidonias-de-plastico-para-proteger-las-playas-de-las-erosion... | 1 |
| 14:04, 5 September 2026 | SeineMudflats.jpg (file) |  |
162 KB | Mudflats and wetlands of the Seine estuary adjacent to the port-industrial area of Le Havre. Photo credit: HAROPA Port. | 1 |
| 14:04, 5 September 2026 | VulnerabilityRisk.jpg (file) |  |
96 KB | Schematic of vulnerability and risk assessment. | 1 |
| 13:03, 5 September 2026 | Callantsoog.jpg (file) |  |
30 KB | Callantsoog, a Dutch coastal village below sea level, protected by a dune. | 1 |
| 15:28, 4 September 2026 | TrophicCascade.jpg (file) |  |
25 KB | Trophic cascades in top-down (a) and bottom-up (b) controlled ecosystems. | 1 |
| 09:46, 2 September 2026 | ImposexGastropod.jpg (file) |  |
46 KB | Female gastropod ''Stramonita brasiliensis'' with imposex. Photo credit Barreira and Castro (2020<ref>Barreira, C.A.R. and Castro, I.B. 2020. Compostos triorganoestanicos. In: Contaminantes orgânicos em ambientes aquáticos, Imprensa Universitária da... | 1 |
| 13:27, 28 August 2026 | RotationDamp.jpg (file) |  |
133 KB | Variation of the ratio |Ψ+/Ψ| over the vertical, showing that the anticyclonic velocity component Ψ− is more strongly damped than the cyclonic component <math>\Psi^+<\math>. | 2 |
| 13:45, 18 August 2026 | SeaweedEvolution.jpg (file) |  |
74 KB | Phylogenetic schematic of seaweeds. They are an ecological grouping, not a single evolutionary lineage. | 1 |
| 20:56, 15 August 2026 | ResistanceResilienceSystemEvolution.jpg (file) |  |
79 KB | Schematic plot of the (eco)system response to a temporal change in environmental conditions that exert a pressure (red) on the system. The time evolution of the ecosystem state is represented by blue lines corresponding to different resistance-resilien... | 2 |
| 14:49, 15 August 2026 | FeedingDiversity.jpg (file) |  |
114 KB | Examples of marine feeding modes used as functional traits in functional-diversity analysis. | 1 |
| 20:18, 14 August 2026 | TraitSpace.jpg (file) |  |
52 KB | Species with similar trait combinations can be grouped together, but boundaries between groups are often approximate. | 1 |
| 19:17, 13 August 2026 | RegimeShift.jpg (file) |  |
48 KB | Schematic ecosystem responses to increasing environmental pressure: gradual response (left), sharp threshold-like response without alternative stable states (middle), and a regime shift between alternative stable states with hysteresis (right). | 1 |
| 09:53, 11 August 2026 | DutchCoastalZoneSites.jpg (file) |  |
85 KB | Characteristics of the Dutch coast. The figure shows a bathymetric map [m] of the coastal zone and wind roses (significant wave height and peak period) at the location indicated by the arrow. | 1 |
| 14:58, 10 August 2026 | SandMotorBalance2021.jpg (file) |  |
411 KB | The evolution of the 21 million m3 ‘sand motor’ nourishment on the Dutch coast from 2011 (initial state) to 2021. | 1 |
| 10:21, 10 August 2026 | OneLineModel.jpg (file) |  |
40 KB | The one-line model schematization of shoreline evolution. | 1 |
| 18:28, 6 August 2026 | InnerClosureDepth.jpg (file) |  |
48 KB | Schematic illustration of the closure-depth concepts of Hallermeier and Kraus et al. The active coastal zone is represented here by the upper shoreface, where cross-shore sediment exchange occurs frequently over timescales of years to decades. The inne... | 1 |
| 09:01, 2 August 2026 | DuneStabilizationConditions.jpg (file) |  |
58 KB | Influence of beach width on dune stabilisation. Figure produced with AI. | 1 |
| 20:06, 28 July 2026 | OilImpact.jpg (file) |  |
562 KB | Schematic of oil spill impact on the marine ecosystem. | 1 |
| 13:00, 26 July 2026 | Nematode.jpg (file) |  |
10 KB | Nematode ''Sabatieria longisetosa''. Photo credit Daniel Leduc. https://www.nemys.ugent.be/photogallery.php?album=777&pic=184838 | 1 |
| 12:59, 26 July 2026 | HarpactacoidCopepod.jpg (file) |  |
6 KB | Harpactacoid copepod. Photo credit Lodewijk van Walraven. https://plankton.photography/harpacticoid-copepods/ | 1 |
| 12:59, 26 July 2026 | Foraminifer.jpg (file) |  |
15 KB | Foraminifer ''Nonionella stella''. Photo credit Isabel Mendes. https://www.marinespecies.org/photogallery.php?album=772&pic=47554 | 1 |
| 12:58, 26 July 2026 | Gastrotrich.jpg (file) |  |
13 KB | Gastrotrich Photo credit Jasper Nance. http://www.flickr.com/photos/nebarnix/ Jasper Nance | 1 |
| 15:37, 24 July 2026 | MicrobialLoop.jpg (file) |  |
77 KB | Schematic representation of the microbial loop and its position in the pelagic food web. | 1 |
| 20:48, 23 July 2026 | MarineMicroorganisms.jpg (file) |  |
180 KB | Simplified classification of the principal groups commonly referred to as marine microorganisms. | 1 |
| 21:07, 22 July 2026 | SieburthPlanktonScale.jpg (file) |  |
60 KB | The ‘Sieburth-scale’, redrawn from Sieburth et al. (1978<ref> Sieburth, J. Mn., Smetacek, V. and Lenz, J. 1978. Pelagic ecosystem structure: Heterotrophic compartments of the plankton and their relationship to plankton size fractions. Limnology and... | 1 |
| 19:34, 22 July 2026 | PlanktonFoodWeb.jpg (file) |  |
47 KB | Marine plankton in the food web. Schematic illustration of food-web relationships within the plankton community and their role in the marine ecosystem. | 1 |
| 19:34, 22 July 2026 | PlanktonCommunity.jpg (file) |  |
69 KB | Principal groups of marine plankton, arranged approximately according to increasing organism size. | 1 |
| 18:38, 21 July 2026 | MangroveRestorationTiwoho.jpg (file) |  |
40 KB | Hydrological rehabilitation of abandoned aquaculture ponds at Tiwoho, North Sulawesi, Indonesia. Photo credit Ben Brown, Rignolda Djamaluddin<ref>Brown, B. and Djamaluddin, R. 2017. A site history and field guide for Ecological Mangrove Rehabilitation... | 2 |
| 10:49, 17 July 2026 | CreekDispersion.jpg (file) |  |
21 KB | The maximum dispersion by a tidal creek due to a phase difference between filling/emptying and the channel current. The corresponding scaled dispersion function <math>f_max/L</math> is shown as a function of the phase <math>\phi</math>. | 1 |
| 10:48, 17 July 2026 | CreekSketch.jpg (file) |  |
27 KB | Definition sketch of a tidal creek. | 1 |
| 13:18, 7 July 2026 | SaltWedgeSlopingBed.jpg (file) |  |
36 KB | In an estuary with bed slope <math>\tan \beta</math>, the salt-wedge length tends to the limiting value <math>L_b=h_s/\tan \beta</math> when the river discharge is small. | 1 |
| 13:26, 3 July 2026 | SalinityTemperatureDensityPlot.jpg (file) |  |
34 KB | Curves of density anomaly [kg m<sup>-3</sup>] for temperatures in the range 0-30°C , salinities in the range 0-40 and atmospheric pressure, based on the EOS-80/UNESCO polynomial. | 1 |
| 15:04, 2 July 2026 | ConductivityCell.jpg (file) |  |
78 KB | Flow-through conductivity cell. Seawater is pumped through a narrow bore containing platinum electrodes. | 1 |
| 15:04, 2 July 2026 | ConductivityPrinciple.jpg (file) |  |
37 KB | Electrode conductivity principle. | 1 |
| 13:37, 29 June 2026 | RevetmentSection.jpg (file) |  |
37 KB | Schematic cross-section of a pattern-placed revetment on an earthen embankment. | 1 |
| 20:39, 25 June 2026 | GroyneRip.jpg (file) |  |
43 KB | Boundary rip: Offshore deviated longshore current along a groyne, carrying sediment outside the surf zone. Photo credit Dr. Wendy Carey, Delaware Sea Grant. https://www.weather.gov/safety/ripcurrent-photos | 1 |
| 20:38, 25 June 2026 | GroyneFieldRip.jpg (file) |  |
79 KB | Groin field at Beach Haven, New Jersey (USA), showing boundary rips. From Hapke et al. (2010<ref name=H10>Hapke, C.J., Himmelstoss, E.A., Kratzmann, M.G., List, J.H. and Thieler, E.R. 2010. National Assessment of Shoreline Change: Historical Shoreline... | 1 |
| 20:38, 25 June 2026 | GroyneFieldBeachResponse.jpg (file) |  |
55 KB | Typical saw-tooth shoreline pattern (updrift accretion and downdrift erosion) in a groyne field on the Long Island coast, NY. Image credit USGS EarthExplorer. | 1 |
