The Scheldt, which is the gateway whereby ships have access to the port of Antwerp (Belgium), is a tidal river flowing into the North Sea at Flushing (Netherlands). The tidal range which on an average is 3.80 m at the mouth of the river, is as much as 4.70 m in the port of Antwerp. The natural depth over the bars between Hansweert and the port of Antwerp is insufficient for navigational needs. Important dredging operations have to be performed, in order to maintain the depth. Furthermore, as the dimensions of ocean-going vessels are in constant increase, both as regards their beam and their draft, larger and larger quantities of sand have to be dredged. In view of the fact that rthe improvement obtained by dredging is insufficient, it has become necessary to consider the undertaking of river improvement works. These are being studied at the Hydraulics Laboratory at Borgerhout (Antwerp). This is a State-controlled center which comes under the Administration of Waterways (Ponts et Chaussees). The areas most in need of improvement are those of Bath and Walsoorden. They lie in Dutch territory; hence the work will have to be done by common agreement with the Netherlands. The paper describes the results obtained from model studies.
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