DEVELOPMENT OF HYDRODYNAMIC, WATER QUALITY AND EUTROPHICATION MODELS - Integrating GIS, Remote Sensing, and Mathematical Modelling for Surface Water Quality Management - page 136

Figure (7-6a, b): Monthly discharges of Edko and Barseek Drains (year 2006).
The tide in the ocean is semidiurnal with amplitude ranging between 0.2 and 1.2 m. Due to a lack of
measured data, tidal varying water levels at the exit channel to the sea were developed using theWX-
TIDE prediction computer program. Figure (7-7) shows the tidal water level variations for the selected
modelling period.
Figure (7-7): Water Level oscillations at sea exit during the simulation period
(January-July 2006).
Wind data used in the model input is based on an hourly time series data collected from the
meteorological station at Alexandria port, which is the nearest point to the study catchment at location
(31.2 latitude and 29.95 longitude). An analysis of the wind time series for the year 2006 gives the
wind rose diagram, which shows the distribution of the wind speed and the frequency of the varying
wind directions. It is concluded from this analysis that the prevailing wind direction in this coastal
region is NNW with an average speed of 5 m/sec as shown in Figure (7-8) .