Aktis Hydraulics has tools for designing channel depth ranging from very simple approaches to sophisticated probabilistic design accounting for all the important factors. This is underpinned by in depth knowledge of:
- Wind, waves, currents and tides;
- The vertical movement of the ship in response to waves and the associated distributions;
- Squat, trim and wind and turning induced heel;
- The effect of winds and currents on the orientation of the ship.
The use of a sophisticated admission policy, allows ship access for a higher percentage of the time with a higher degree of safety than a simple system based on a limited number of simple criteria. A consequence of this is that the required dredging will be less when a sophisticated admission system is applied. An example of such a system is PROTIDE (see Bos, Koop & Bolt, PIANC 2011), as applied for the ports of Amsterdam, Rotterdam, Eemshaven, Zeeland (NL), Antwerp (BE), Emden (DE) and Port of Longbeach (USA).
The result of a typical study is typically a recommendation for the minimum dredged depth of an access channel for a particular safety level (e.g. the probability of any ship touching the seabed in a 25 year period is less than 10%).