Hindcasting wave climatology off Jeddah coast

Abstract EN

Wave characteristics off Jeddah CO extensive set of hourly meteorological data extending over 12 months.

A preliminary survey shows that there are only limited information available regarding (he wave characteristics in front of Jeddah, which appear to be based on general terms and not well founded on scientific basis.

Method of ?ierson, Neumann and James (PNJ) is applied to the adjusted wind data to hindcast the wave generation spectrum.

To verify the results of the hindcasted scheme, waves are measured in front of Jeddah coast (4 miles west of Ubhur Creek entrance).

Analysis of the observed wave records shows an energetic band of waves at frequencies around 0.135 Hz, (period = 7.4 sec) and significant wave height around 1.3 m, during the period of measurements.

shows a <؛ve،؛'^ Comparison between the hindcasted and observed number of qualitative agreement with physical basis for the quantitative variations.

Results demonstrate the limitation of the standard procedure re-commended by SPM (1984) to adjust the over-land wind (0 over-sea e^pe-cially at calm wind conditions.

However, the comparison with field data de-ol-،،؛m؛monstrates the ability of PNJ method to reasonably hindcast wave cl ,ogy off Jeddah coast -