X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Online Resource
    Online Resource
    THE KAPODISTRIAS GROUNDING AND OIL SPILL CAPE RECIFE, SOUTH AFRICA
    International Oil Spill Conference ; 1987
    In:  International Oil Spill Conference Proceedings Vol. 1987, No. 1 ( 1987-04-01), p. 33-38
    Details
    In: International Oil Spill Conference Proceedings, International Oil Spill Conference, Vol. 1987, No. 1 ( 1987-04-01), p. 33-38
    Abstract: In July 1985, a Panamanian registered bulk carrier, the Kapodistrias ran aground off Cape Recife, South Africa with just over 900 m3 of oil on board as fuel. Some oil was lost to the sea at various stages during the attempted salvage operation. Wind and wave action drove a part of this oil into Algoa Bay, to within 10 km of St. Croix Island which is an important breeding area for jackass penguins (Spheniscus demersus). The effect of oil on the penguin population and the action taken is discussed, as are the immediate uptake and subsequent depuration of hydrocarbons in locally occurring shellfish. No other major environmental damage occurred. Despite the relatively small size of the spill (500 m3 over 15 days), a significant effect on seabirds was observed, indicating that the influence of an oil spill depends not only on the amount of oil spilled but also on the sensitivity of the environment affected.
    Type of Medium: Online Resource
    ISSN: 2169-3358 , 2169-3366
    URL: Article
    DOI: 10.7901/2169-3358-1987-1-33
    Language: English
    Publisher: International Oil Spill Conference
    Publication Date: 1987
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Online Resource
    Open Access Request
    Availability (electronic / print)
  • 2
    Online Resource
    Online Resource
    Tidal flow structures and sedimentation in the lower Kowie estuary, Port Alfred, South Africa
    Informa UK Limited ; 2001
    In:  Transactions of the Royal Society of South Africa Vol. 56, No. 1 ( 2001-01), p. 11-24
    Details
    In: Transactions of the Royal Society of South Africa, Informa UK Limited, Vol. 56, No. 1 ( 2001-01), p. 11-24
    Type of Medium: Online Resource
    ISSN: 0035-919X , 2154-0098
    URL: Article
    DOI: 10.1080/00359190109520452
    Language: English
    Publisher: Informa UK Limited
    Publication Date: 2001
    detail.hit.zdb_id: 2115326-7
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Online Resource
    Open Access Request
    Availability (electronic / print)
  • 3
    Online Resource
    Online Resource
    Sea level variability in South African estuaries
    Academy of Science of South Africa ; 2013
    In:  South African Journal of Science Vol. 109, No. 3/4 ( 2013-03-26), p. 7-
    Details
    In: South African Journal of Science, Academy of Science of South Africa, Vol. 109, No. 3/4 ( 2013-03-26), p. 7-
    Abstract: Sea level variability in the coastal ocean affects water levels in adjacent estuaries over a wide range of periods and to varying distances landward. An assessment is given here of the responses of a number of South African estuaries, focusing on tidal and subtidal periods where the dominant effects are found and the necessary data are available. Shorter period inputs tend to be limited to mouth regions and require more detailed, higher frequency data. Subtidal fluctuations, in particular those caused by coastal trapped waves, play an important part in the dynamics of estuaries in the Western Cape and Eastern Cape. In many cases their influence dominates tidal oscillations farther upstream, and it is apparent that such fluctuations must be considered in any assessment of estuarine characteristics, and indeed their upstream extent. Nonetheless, it should be emphasised that each estuary has unique properties, and must be assessed individually. Sea level variability changes dramatically north of the Kei Estuary, and particularly off the coast of KwaZulu-Natal. Unfortunately, few measurements were available from these estuaries, but the mouth conditions of the estuaries and the build-up of river flow appear to be important factors in resulting estuary water levels. These results show that using only tidal variations in the sea can result in very misleading conclusions about concurrent water levels in estuaries.
    Type of Medium: Online Resource
    ISSN: 1996-7489
    URL: Article
    DOI: 10.1590/sajs.2013/1332
    Language: Unknown
    Publisher: Academy of Science of South Africa
    Publication Date: 2013
    detail.hit.zdb_id: 2067033-3
    detail.hit.zdb_id: 2482725-3
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Online Resource
    Open Access Request
    Availability (electronic / print)
  • 4
    Online Resource
    Online Resource
    Wind-driven mixed layer and coastal upwelling processes off the south coast of South Africa
    Journal of Marine Research/Yale ; 1999
    In:  Journal of Marine Research Vol. 57, No. 4 ( 1999-7-1), p. 671-691
    Details
    In: Journal of Marine Research, Journal of Marine Research/Yale, Vol. 57, No. 4 ( 1999-7-1), p. 671-691
    Type of Medium: Online Resource
    ISSN: 1543-9542 , 0022-2402
    URL: Article
    DOI: 10.1357/002224099321549639
    Language: Unknown
    Publisher: Journal of Marine Research/Yale
    Publication Date: 1999
    detail.hit.zdb_id: 410655-6
    detail.hit.zdb_id: 2066603-2
    SSG: 12
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Online Resource
    Open Access Request
    Availability (electronic / print)
  • 5
    Online Resource
    Online Resource
    Oceanic exchanges and temperature variability in the Knysna Estuary
    Informa UK Limited ; 2000
    In:  Transactions of the Royal Society of South Africa Vol. 55, No. 2 ( 2000-01), p. 123-128
    Details
    In: Transactions of the Royal Society of South Africa, Informa UK Limited, Vol. 55, No. 2 ( 2000-01), p. 123-128
    Type of Medium: Online Resource
    ISSN: 0035-919X , 2154-0098
    URL: Article
    DOI: 10.1080/00359190009520438
    Language: English
    Publisher: Informa UK Limited
    Publication Date: 2000
    detail.hit.zdb_id: 2115326-7
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Online Resource
    Open Access Request
    Availability (electronic / print)
  • 6
    Online Resource
    Online Resource
    Nurdle drifters around South Africa as indicators of ocean structures and dispersion
    Academy of Science of South Africa ; 2019
    In:  South African Journal of Science Vol. 115, No. 5/6 ( 2019-05-29)
    Details
    In: South African Journal of Science, Academy of Science of South Africa, Vol. 115, No. 5/6 ( 2019-05-29)
    Abstract: Dispersion processes in the ocean typically involve wind, ocean currents and waves. All these factors were included in an analysis to model nurdle dispersion from an accidental spill in Durban Harbour, South Africa, in October 2017. Nurdle sightings on beaches by members of the public are used as indicators of the dispersion which extended over 2000 km of the South African coastline in a period of 8 weeks. Using known oceanographic current structures, satellite imagery, wave data and surface wind drift values of between 5% and 8% of wind speed, good agreement was found between the modelled dispersion and nurdle sightings. In particular, it was found that nurdles remained in specific sections of the coast for long periods, and that sporadic wind events were required to move them into new coastal areas. Such results may also contribute to understanding the dispersal behaviours and strategies adopted by larval stages of marine organisms, particularly fishes, that have pelagic larval durations that extend over weeks to months. The event was recognised as a major pollution incident rivalling other nurdle spillages reported worldwide, and extensive efforts were made to collect the nurdles, particularly along the northern KwaZulu-Natal coast. However, 9 months later, less than 20% had been recovered. The results emphasise the connectivity of different ocean regions, and in particular that pollution of the ocean is not a localised activity. Matter discharged at one point will disperse over a wide area – in this case, significantly further afield than the area of recovery operations. Significance: Wind drift in the upper metre or two of the ocean has been notoriously difficult to quantify, and the spread of nurdles along the South African coastline can only be explained by using drift percentages two or three times the generally accepted value of 3% or less. Nonetheless, it is important to realise that there are substantial differences in dispersion rates between the upper few centimetres of the ocean and that even a metre or two deeper. The rapid manner in which nurdles, and other microplastics, can be dispersed is important in terms of understanding the spread of this form of pollution in the world’s oceans. The results also confirm the important role that wind can play in the movement of eggs, larvae and invertebrates and the significance of vertical migrations in and out of the surface layers.
    Type of Medium: Online Resource
    ISSN: 1996-7489
    URL: Article
    DOI: 10.17159/sajs.2019/5372
    Language: Unknown
    Publisher: Academy of Science of South Africa
    Publication Date: 2019
    detail.hit.zdb_id: 2067033-3
    detail.hit.zdb_id: 2482725-3
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Online Resource
    Open Access Request
    Availability (electronic / print)
  • 7
    Online Resource
    Online Resource
    Interannual wind variability on the south and east coasts of South Africa
    American Geophysical Union (AGU) ; 1992
    In:  Journal of Geophysical Research: Atmospheres Vol. 97, No. D18 ( 1992-12-20), p. 20397-20403
    Details
    In: Journal of Geophysical Research: Atmospheres, American Geophysical Union (AGU), Vol. 97, No. D18 ( 1992-12-20), p. 20397-20403
    Abstract: An analysis of 38 years of wind data from three sites along the South African east and south coasts is made to determine interannual variability. Different period bands are investigated, and it is found that the northernmost site (Durban, at about 30°S) differs markedly from the two southern sites (Port Elizabeth and Cape Town, at about 34°S). At the latter sites interannual trends exist in the yearly averaged wind directions, while for Port Elizabeth the principal axis orientations including winds lying within the “weather band” also show such a trend. It appears that a major readjustment occurred at the two southern sites during the very strong El Niño Southern Oscillation (ENSO) event in 1982/1983, with abrupt changes of up to 30° in the wind directions being registered. On the other hand, there are no clearly identifiable trends in the wind speeds, and longer time series will be needed to establish correlations with weaker ENSO events.
    Type of Medium: Online Resource
    ISSN: 0148-0227
    URL: Article
    DOI: 10.1029/92JD02215
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 1992
    detail.hit.zdb_id: 2033040-6
    detail.hit.zdb_id: 3094104-0
    detail.hit.zdb_id: 2130824-X
    detail.hit.zdb_id: 2016813-5
    detail.hit.zdb_id: 2016810-X
    detail.hit.zdb_id: 2403298-0
    detail.hit.zdb_id: 2016800-7
    detail.hit.zdb_id: 161666-3
    detail.hit.zdb_id: 161667-5
    detail.hit.zdb_id: 2969341-X
    detail.hit.zdb_id: 161665-1
    detail.hit.zdb_id: 3094268-8
    detail.hit.zdb_id: 710256-2
    detail.hit.zdb_id: 2016804-4
    detail.hit.zdb_id: 3094181-7
    detail.hit.zdb_id: 3094219-6
    detail.hit.zdb_id: 3094167-2
    detail.hit.zdb_id: 2220777-6
    detail.hit.zdb_id: 3094197-0
    SSG: 16,13
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Online Resource
    Open Access Request
    Availability (electronic / print)
  • 8
    Online Resource
    Online Resource
    Freshwater Inflow and Estuarine Variability in the Gamtoos Estuary, South Africa
    Springer Science and Business Media LLC ; 1997
    In:  Estuaries Vol. 20, No. 1 ( 1997-03), p. 124-
    Details
    In: Estuaries, Springer Science and Business Media LLC, Vol. 20, No. 1 ( 1997-03), p. 124-
    Type of Medium: Online Resource
    ISSN: 0160-8347
    URL: Article
    DOI: 10.2307/1352726
    Language: Unknown
    Publisher: Springer Science and Business Media LLC
    Publication Date: 1997
    detail.hit.zdb_id: 434402-9
    detail.hit.zdb_id: 2229170-2
    detail.hit.zdb_id: 2029242-9
    SSG: 12
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Online Resource
    Open Access Request
    Availability (electronic / print)
  • 9
    Online Resource
    Online Resource
    Agulhas current variability and inshore structures off the Cape Province, South Africa
    American Geophysical Union (AGU) ; 1990
    In:  Journal of Geophysical Research: Oceans Vol. 95, No. C1 ( 1990-01-15), p. 667-678
    Details
    In: Journal of Geophysical Research: Oceans, American Geophysical Union (AGU), Vol. 95, No. C1 ( 1990-01-15), p. 667-678
    Abstract: Satellite imagery over a 3‐year period is used to provide statistical data on the position of the Agulhas Current, frontal features, and meanders off the southeast coast of South Africa. Data recorded during a cruise undertaken over the continental shelf off Algoa Bay in May 1987 provided subsurface temperature data of a large frontal feature and is used to correlate in situ measurements with satellite imagery. It is found that the inshore thermal front of the Agulhas Current lay, on average, at the shelf break northeast of Algoa Bay and seaward of it to the west. Its thermal core was about 26 km further out. The Agulhas Current influences the ocean structures over the shelf area by longer‐term Natal Pulses and shorter term warm surface frontal plume fluctuations. A case study of a rapidly propagating meander (average speed, 42 km/day) showed that an inshore plume formed a thin wedge over the cooler shelf water, and it illustrated that the surface signature as seen by satellite imagery does not necessarily correspond to the subsurface structure. The formation of a large shear‐edge eddy could also be followed and was possibly accentuated by a severe storm.
    Type of Medium: Online Resource
    ISSN: 0148-0227
    URL: Article
    DOI: 10.1029/JC095iC01p00667
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 1990
    detail.hit.zdb_id: 2033040-6
    detail.hit.zdb_id: 3094104-0
    detail.hit.zdb_id: 2130824-X
    detail.hit.zdb_id: 2016813-5
    detail.hit.zdb_id: 2016810-X
    detail.hit.zdb_id: 2403298-0
    detail.hit.zdb_id: 2016800-7
    detail.hit.zdb_id: 161666-3
    detail.hit.zdb_id: 161667-5
    detail.hit.zdb_id: 2969341-X
    detail.hit.zdb_id: 161665-1
    detail.hit.zdb_id: 3094268-8
    detail.hit.zdb_id: 710256-2
    detail.hit.zdb_id: 2016804-4
    detail.hit.zdb_id: 3094181-7
    detail.hit.zdb_id: 3094219-6
    detail.hit.zdb_id: 3094167-2
    detail.hit.zdb_id: 2220777-6
    detail.hit.zdb_id: 3094197-0
    SSG: 16,13
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Online Resource
    Open Access Request
    Availability (electronic / print)
  • 10
    Online Resource
    Online Resource
    Floods, sedimentation and tidal exchanges in the Keurbooms Estuary, South Africa
    Springer Science and Business Media LLC ; 2021
    In:  Geo-Marine Letters Vol. 41, No. 3 ( 2021-09)
    Details
    In: Geo-Marine Letters, Springer Science and Business Media LLC, Vol. 41, No. 3 ( 2021-09)
    Type of Medium: Online Resource
    ISSN: 0276-0460 , 1432-1157
    URL: Article
    DOI: 10.1007/s00367-021-00709-4
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2021
    detail.hit.zdb_id: 1481423-7
    detail.hit.zdb_id: 381526-2
    SSG: 13
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Online Resource
    Open Access Request
    Availability (electronic / print)
Nothing or not found what you are looking for? Please check your search query or use the Interlibrary Loan Search.
Close ⊗
This website uses cookies and the analysis tool Matomo. Further information can be found on the KOBV privacy pages