HIGH AND LOW WATER PREDICTION AT LAGOS HARBOUR, NIGERIA

  • OT Badejo DEPARTMENT OF SURVEYING AND GEOINFORMATICS, UNIVERSITY OF LAGOS, LAGOS STATE, NIGERIA
  • SO Akintoye DEPARTMENT OF SURVEYING AND GEOINFORMATICS, UNIVERSITY OF LAGOS, LAGOS STATE, NIGERIA
Keywords: harbor, tidal harmonic analysis, tidal prediction model, water level.

Abstract

In this work, 500 hourly water level tidal data were used to perform least squares tidal harmonic analysis. Eleven tidal constituents were used for the harmonic analysis. Astronomical arguments (v + u) and the nodal factor (f) were computed for each tidal constituent and at each observational period with a programme written in Matlab environment. The harmonic constants determined from the least squares tidal harmonic analysis were substituted into a tidal prediction model to predict hourly tidal data and tidal predictions at 5 minutes’ intervals. Series of high and low water heights from the tidal predictions made at 5 minutes’ intervals were determined and matched with their corresponding times. Autocorrelation at lags 1 to 30 for the residuals of the observed and predicted tidal data shows that there is no significant correlation in the range of the 30 lags. The series of residuals of the observed and predicted tidal data is therefore white noise.

 

 

http://dx.doi.org/10.4314/njt.v36i3.39

Published
2017-06-30
Section
Agricultural, Bioresources, Biomedical, Food, Environmental & Water Resources Engineering

Journal Identifiers


eISSN: 2467-8821
print ISSN: 0331-8443