Atoll lagoon flushing forced by waves

Callaghan, David P.; Nielsen, Peter; Cartwright, Nick; Gourlay, Michael R.; Baldock, Tom E.

doi:10.1016/j.coastaleng.2006.02.006

Cited by 89 publications

(84 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the absence of hoa is not always an impediment to lagoon circulation. On the atolls of Manahiki and Rakahanga in the Cook group, for example, the windward side is a wall of islands, but large waves force water over the rim (Callaghan et al, 2006). Waves may also break on the reef flats and be driven across (e.g., Majuro in the Marshall Islands; Kraines et al, 2001).…”

Section: Lagoon Variation: An Abbreviated Overview Of the Atoll Familymentioning

confidence: 99%

Atolls of the World: Revisiting the Original Checklist

Goldberg¹

2016

Atoll Research Bulletin

View full text Add to dashboard Cite

Section: Lagoon Variation: An Abbreviated Overview Of the Atoll Familymentioning

confidence: 99%

Atolls of the World: Revisiting the Original Checklist

Goldberg¹

2016

Atoll Research Bulletin

View full text Add to dashboard Cite

“…Although the two node model is very simple in its form, it is able to simulate semi-realistic flooding behaviour in Lake Conjola. This was expected as similar approaches at Manihiki atoll lagoon using a correspondingly simplistic approach also adequately reproduced measurements (Callaghan et al, 2006;Sugandika et al, 2013). Model improvements were discussed in general terms (i.e., what more complex models would need to account for) and in terms of this particular model (refining the pumping height).…”

Section: Discussionmentioning

confidence: 53%

“…The third point is that during the storm period when there was no overwash (e.g., 6th April), all models matched well with the measured lake levels, confirming right orders of channel and roughness parameters determined. Finally, the wave overwash required to lift lake levels above that of the ocean was also concluded by Callaghan et al (2006) for a continuous rim atoll lagoon. …”

Section: Node 2 Nodementioning

confidence: 99%

See 1 more Smart Citation

Ocean Driven Flooding of a Coastal Lake

Callaghan

Hanslow³

et al. 2014

Int. Conf. Coastal. Eng.

Self Cite

View full text Add to dashboard Cite

Analysis of Lake Conjola flooding in April 2006, provided in this paper, attributes it to waves pumping water over a 300 m long beach berm and into Lake Conjola. This overwash, generated by the medium wave height swell occurring during this flooding, was able to lift the lake levels near the entrance, persistently over several tidal cycles, to well above the ocean water levels . The wave pump model was used to model this flooding. Lake Conjola water storage and dynamics were modelled by using a two-node continuity based model that a change in storage in time is driven by the net inflow to a node and these nodes and the ocean are linked by log-law. The extents of these two nodes were established from previous water surface measurements. While the qualitative flood behavior was reproduced by this remarkably simple model, the peak flood level was not satisfactorily predicted when using literature values for model turning parameters. One reason for this mismatch was that the waves pumped against a head including critical flow on the beach berm. Based on recent images of Lake Conjola wave overwash events, it may be concluded that pumping against critical flow is too harsh. Removing this from the model has halved the gap between the measurements and predictions. However, more research is definitely required to establish what components should be included in the hydraulic head pumped against.

show abstract

“…Oceanic waters flow into and exit the lagoons of these atolls through passes, although most water flows into the lagoons of these NWHI atolls, and many other atolls and reefs elsewhere (Callaghan et al 2006;Coronado et al 2007), across their barrier reefs (R. Hoeke, NOAA Fisheries, Pac. Islands Fish.…”

Section: Study Areamentioning

confidence: 99%

Influences of wind-wave exposure on the distribution and density of recruit reef fishes at Kure and Pearl and Hermes Atolls, Northwestern Hawaiian Islands

et al. 2009

View full text Add to dashboard Cite

This paper describes the results of a field survey designed to test the prediction that the density of benthic juveniles of shallow-reef fishes is greater on wind-wave "exposed" sectors of a pair of isolated oceanic atolls (Kure, Pearl and Hermes) at the far northwestern end of the Hawaiian Islands, an archipelago in which east-northeasterly trade winds dominate onshore water flow and transport by surface currents. The densities of recruits (juveniles ≤5 cm total length) were higher overall on windward versus leeward sectors of carbonate rock-rubble back reefs at both atolls, and the pattern was stronger for smaller (likely younger, more recently settled) recruits of four of the five most abundant species and the remainder pooled as an "Other" taxon. The windward-leeward disparity was four-fold greater at Pearl Hermes (the atoll with a three-fold longer perimeter) than at Kure. Resident predator biomass also was correlated with recruit densities, but habitat (benthic substratum) effects were generally weak. The distribution and abundance of recruits and juveniles of the primarily endemic reef fishes on shallow back reefs at these atolls appear partly influenced by relative rates of water flow over windward vs. leeward sectors of barrier reef and by the size, shape, and orientation of habitat parcels that filter out postlarval fishes with relatively weak swimming capabilities like labroids. Whole-reef geomorphology as well as fine-scale habitat heterogeneity and rugosity should be considered among the suite of many factors used to interpret observed spatial patterns of post-settlement juvenile fish distribution at atolls and perhaps some other tropical reefs.

show abstract

Atoll lagoon flushing forced by waves

Cited by 89 publications

References 15 publications

Atolls of the World: Revisiting the Original Checklist

Atolls of the World: Revisiting the Original Checklist

Ocean Driven Flooding of a Coastal Lake

Influences of wind-wave exposure on the distribution and density of recruit reef fishes at Kure and Pearl and Hermes Atolls, Northwestern Hawaiian Islands

Contact Info

Product

Resources

About