dc.contributor.advisor | Diedericks, Gerhardus Petrus Jacobus | en_ZA |
dc.contributor.advisor | Fidder-Woudberg, Sonia | en_ZA |
dc.contributor.author | Mphasha, Rosa | en_ZA |
dc.contributor.other | Stellenbosch University. Faculty of Science. Dept. of Mathematical Sciences (Applied Mathematics) | en_ZA |
dc.date.accessioned | 2016-03-09T14:27:45Z | |
dc.date.available | 2016-03-09T14:27:45Z | |
dc.date.issued | 2016-03 | |
dc.identifier.uri | http://hdl.handle.net/10019.1/98508 | |
dc.description | Thesis (MSc)--Stellenbosch University, 2016 | en_ZA |
dc.description.abstract | ENGLISH ABSTRACT : Factors that lead to the generation of currents in the nearshore area within the
Natal Bight were investigated. The investigation was carried out on data that
spans from the 6th June 2012 to the 16th January 2013. The data comprised
current measurements, wave measurements, water level measurements, as well
as wind measurements. The measurements were decomposed into different direction
components in order to study their impacts on corresponding current
measurements. Current measurements were resolved into tidal currents and
non-tidal currents through the use of harmonic analysis. Stokes drift was estimated
using a monochromatic spectrum to obtain the wave induced current.
The effect of the wind on the currents was analysed through the use of wind
roses and duration analysis. The study was completed with an exploration
of the contribution of the Agulhas current. It was found that the waters are
characterized by a semi-diurnal, micro-tidal system and tides have a limited
contribution to the generation of currents. The contribution of Stokes drift
to the overall currents is less than that of tides. Wind is the most significant
generator of the nearshore currents. | en_ZA |
dc.description.abstract | AFRIKAANSE OPSOMMING : Faktore wat lei tot die opwekking van strome in die kusgebied binne die Natal
Bog (Eng. Natal Bight) was ondersoek. Die ondersoek is uitgevoer op data wat
strek vanaf die 6de Junie 2012 tot die 16de Januarie 2013. Die data bestaan
uit stroom metings, golf metings, watervlak metings asook wind metings. Die
metings word ontbind in verskillende komponente ten einde die impak daarvan
op die ooreenstemmende stroom metings te bestudeer. Stroom metings was
onderskeidelik in gety strome en nie-gety strome verdeel deur gebruik te maak
van harmoniese analise. Stokes dryf was bereken deur van ’n monochromatiese
golfspektrum gebruik te maak. Die uitwerking van die wind op die strome is
analiseer deur die gebruik van wind rose en ’n analise van die duurte waaroor
winde uit spesifieke rigtings gewaai het. Die studie is voltooi met ’n ondersoek
na die bydrae van die Agulhas-stroom tot die gemete strome. Daar is gevind
dat die waters gekenmerk word deur ’n twaalf-uurlikse, mikro-gety stelsel en
dat getye ’n beperkte bydrae tot die opwekkinging van strome het. Die bydrae
van Stokes dryf tot die algehele strome is minder as die bydrae van getye.
Wind is die belangrikste stroomopwekker van die strome langs die kus. | af_ZA |
dc.format.extent | xx, 197 pages : illustrations (mainly colour) | en_ZA |
dc.language.iso | en_ZA | en_ZA |
dc.publisher | Stellenbosch : Stellenbosch University | en_ZA |
dc.subject | Nearshore currents -- South Africa -- Kwa-Zulu Natal | en_ZA |
dc.subject | Non-tidal currents -- South Africa -- Kwa-Zulu Natal | en_ZA |
dc.subject | Tidal currents -- South Africa -- Kwa-Zulu Natal | en_ZA |
dc.subject | UTCD | en_ZA |
dc.subject | Natal Bight | en_ZA |
dc.subject | Stokes drift velocity | en_ZA |
dc.subject | Time series analysis | en_ZA |
dc.subject | Ocean current generation | en_ZA |
dc.title | Time series analysis of data measured in the nearshore area | en_ZA |
dc.type | Thesis | en_ZA |
dc.rights.holder | Stellenbosch University | en_ZA |