Water Level Data

Water levels are recorded at six locations along the Dubai coast. The Valeport 740 tide gauges measure water level every 10 minutes while Valeport 730 WT tide gauges record tidal slope, maximum positive wave amplitude, maximum negative wave amplitude, mean wave period, mean zero upcrossing period, wave period, wave height, and absolute pressure every 30 minutes and water temperature, water temperature error, absolute pressure, absolute pressure error and water level every 15 minutes.

The vented tide gauges (all tide gauges, except Mamzar and Jebel Ali) actually report hydrostatic pressure in dbar. 1 dbar is approximately equivalent to 1 m of water. Hydrostatic pressure is linearly dependent on depth, so by establishing a local datum at each vented tide gauge and measuring the position of the sea surface relative to that datum, it is possible to calibrate these tide gauges via linear regression. The datum used for calibration is 0 DMD, which is slightly deeper than the Lowest Astronomical Tide (LAT). Once calibrated, the vented tide gauges report "tidal elevation", which is the depth of the water above 0 DMD. All the vented tide gauges have been calibrated.

Water level data available for different stations as follows:

• Jebel Ali Nearshore: July 2010 - Present.
• Mamzar: March 2010 - Present.
• Mina Seyahi: July 2002 - Present.
• Jumeirah Beach Hotel: May 2010 - Present.
• Shindagha: February 2010 - Present.
• Dubai Festival City: March 2010 - Present.