The beneficial role of rubble mound coastal structures on seawater oxygenation

Daniil, EI; Tsoukala, VK; Moutzouris, CI

dc.contributor.author	Daniil, EI	en
dc.contributor.author	Tsoukala, VK	en
dc.contributor.author	Moutzouris, CI	en
dc.date.accessioned	2014-03-01T01:15:55Z
dc.date.available	2014-03-01T01:15:55Z
dc.date.issued	2000	en
dc.identifier.issn	0992-7689	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13822
dc.subject	oceanography	en
dc.subject	physical	en
dc.subject	air-sea interactions	en
dc.subject	surface waves and tides	en
dc.subject.classification	Astronomy & Astrophysics	en
dc.subject.classification	Geosciences, Multidisciplinary	en
dc.subject.classification	Meteorology & Atmospheric Sciences	en
dc.subject.other	GAS TRANSFER	en
dc.subject.other	PLUNGING BREAKERS	en
dc.subject.other	BREAKING WAVES	en
dc.subject.other	TRANSPORT	en
dc.subject.other	MODEL	en
dc.title	The beneficial role of rubble mound coastal structures on seawater oxygenation	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/s00585-000-1360-8	en
heal.identifier.secondary	http://dx.doi.org/10.1007/s00585-000-1360-8	en
heal.language	English	en
heal.publicationDate	2000	en
heal.abstract	The beneficial role of rubble mound coastal structures on oxygenation under the effect of waves is discussed, based on analytical considerations and experimental data from laboratory experiments with permeable and impermeable structures. Significant oxygenation of the wave-protected area was observed as a result of horizontal transport through the permeable structure. A two-cell model describing the transport of dissolved oxygen (DO) near a rubble mound breakwater structure was developed and used for the determination of the oxygen transfer coefficients from the experimental data. Oxygen transfer through the air-water interface is considered a source term in the transport equation and the oxygen flux through the structure is taken into account. The mass transport equations for both sides of the structure are solved analytically in terms of time evolution of DO concentration. The behaviour of the solution is illustrated for three different characteristic cases of initial conditions. The oxygen transfer through the air-water interface in the wave-influenced area increases the DO content in the area; the resulting oxygen flux through the structure is discussed. The analytical results depend on the initial conditions, the oxygen transfer coefficient and the exchange flow rate through the structure. Experiments with impermeable structures show that air water oxygen transfer in the harbour area is negligible in the absence of waves. In addition the ratio of the horizontal DO flux to the vertical flux into the seaward side tends towards a constant value, independent of the initial conditions.	en
heal.publisher	SPRINGER-VERLAG	en
heal.journalName	ANNALES GEOPHYSICAE-ATMOSPHERES HYDROSPHERES AND SPACE SCIENCES	en
dc.identifier.doi	10.1007/s00585-000-1360-8	en
dc.identifier.isi	ISI:000165131100010	en
dc.identifier.volume	18	en
dc.identifier.issue	10	en
dc.identifier.spage	1360	en
dc.identifier.epage	1371	en