Construction of BOS and BES
The BOS consists of six basic elements:
- The script (consisting of algorithmic
decision-rules): the procedures for
the New Waterway Storm Surge Barrier,
the Hartel Barrier and the Hartel
Sluices. This software contains all
the procedures for opening and
closing the barriers and the sluices and for the
movements of the barrier during
closure. The script determines when a
function is used.
- The script interpreter. This reads
the decision-rules from the script
and activates the necessary functions
in the metacomputer.
The metacomputer. This is in fact a
collection of all possible
conceivable functions of the barrier.
The script determines when a function
Sobek, a water-movement model,
developed by the Research Institute
for Waste-Water Purification (RIZA)
in collaboration with the
Hydrological Laboratory at De Voorst
(North-East Polder). On the basis of
a large number of data, Sobek
calculates the anticipated water
levels at Rotterdam, Spijkenisse and
Dordrecht. Apart from current
information Sobek also works with
historical data (going back 12 days).
The data communication network, which
gathers data from all relevant
measurement networks in the "outside
world": measurement networks of the
Department of Public Works and Water Management, the Hydro
and Meteo Information Centre Rijnmond
and the Storm Surge Warning Service.
In alarm situations the data
communication network also sends out
Direct connections with the barrier
control system (BES).