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  • Canadian Science Publishing  (3)
  • 1975-1979  (3)
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  • Canadian Science Publishing  (3)
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  • 1975-1979  (3)
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  • 1
    Online Resource
    Online Resource
    Currents in Johnstone Strait, British Columbia: Supplemental Data on the Vancouver Island Side
    Canadian Science Publishing ; 1977
    In:  Journal of the Fisheries Research Board of Canada Vol. 34, No. 5 ( 1977-05-01), p. 697-703
    Details
    In: Journal of the Fisheries Research Board of Canada, Canadian Science Publishing, Vol. 34, No. 5 ( 1977-05-01), p. 697-703
    Abstract: Records from a current meter recently found adrift after 3 yr have been used to complete previously published cross sections of mean flow and tidal currents in Johnstone Strait. The new plots emphasize the cross-channel asymmetry of the estuarine circulation and the large phase lag of the upper layer current relative to the bottom currents for the diurnal (K 1 ) tidal constituent. A recalculation of the net volume transport shows that its magnitude and direction remain undeterminable to the order of ± 10 3  m 3 ∙s −1 . Key words: tidal currents, residual currents, estuarine circulation, Johnstone Strait
    Type of Medium: Online Resource
    ISSN: 0015-296X
    URL: Article
    DOI: 10.1139/f77-108
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1977
    detail.hit.zdb_id: 3036-3
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  • 2
    Online Resource
    Online Resource
    Longshore Current Generation by Internal Waves in the Strait of Georgia
    Canadian Science Publishing ; 1975
    In:  Canadian Journal of Earth Sciences Vol. 12, No. 3 ( 1975-03-01), p. 472-488
    Details
    In: Canadian Journal of Earth Sciences, Canadian Science Publishing, Vol. 12, No. 3 ( 1975-03-01), p. 472-488
    Abstract: Presented in this paper is a derivation of the longshore current generated by breaking lowest mode internal waves in a two layer fluid of slowly shallowing depth, with emphasis on the nearshore region of the Fraser River delta in the Strait of Georgia. It is proposed that such a current, having a maximum speed of order 10 4 /μ v  cm 3 /s 2 (equal to 10 2  cm/s for reasonable vertical eddy viscosities, μ v , of 10 2  cm 2 /s) and a width of order kilometers based on measured water properties and internal wave characteristics in the Strait, is responsible for the persistent northward flow observed to be associated with the delta in summer. Accordingly, it is suggested that the longshore current would have important implications to sedimentation rates and pollutant dispersal in the delta area, with greatest effects possibly occurring in summer and fall when the stratification in the Strait of Georgia is most pronounced.
    Type of Medium: Online Resource
    ISSN: 0008-4077 , 1480-3313
    URL: Article
    DOI: 10.1139/e75-041
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1975
    detail.hit.zdb_id: 417294-2
    detail.hit.zdb_id: 1491201-6
    SSG: 16,13
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  • 3
    Online Resource
    Online Resource
    Tidal Currents and Estuarine-Type Circulation in Johnstone Strait, British Columbia
    Canadian Science Publishing ; 1976
    In:  Journal of the Fisheries Research Board of Canada Vol. 33, No. 10 ( 1976-10-01), p. 2242-2264
    Details
    In: Journal of the Fisheries Research Board of Canada, Canadian Science Publishing, Vol. 33, No. 10 ( 1976-10-01), p. 2242-2264
    Abstract: Four months of current meter observations across the western basin of Johnstone Strait have been examined, with particular attention given to the mean flow and to variations at tidal frequencies. We show that the time-averaged motions are typical of a moderately stratified estuary driven by tidal mixing and nonlinear advection. Steady currents are nearly unidirectional at all depths with the net outflow in the upper layer essentially balanced by a net inflow in the lower layer to order 10 3  m 3 ∙s −1 . In addition, the relatively small variation in residual current speed is found to decrease with depth and to be associated mostly with the quasi-fortnightly tidal cycle. Near the surface the variance in the residual flow appears to be related to along-channel winds whose speeds and duration exceed 6 m∙s −1 and 24 h, respectively. Time-dependent motions are dominated by the tidal signal which is mixed, predominately semidiurnal. Maximum speeds of order 1 m∙s −1 are found at depth and are generally 1.5–1.7 times larger than in the upper layer. There is also a strong correlation between the tidal current speeds below 150-m depth and the local tide height lagged by 6 h. It is suggested that these large lower layer currents are associated with baroclinic motions being generated by the barotropic tide propagating over the rapidly shoaling bathymetry to the east of the observation region.
    Type of Medium: Online Resource
    ISSN: 0015-296X
    URL: Article
    DOI: 10.1139/f76-272
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1976
    detail.hit.zdb_id: 3036-3
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