Hydro-ecological relations in the Delta Waters

2 CHIWGES XN TEE DELTA
The Delta are was formed by the interaction 05 the rivers &be. Meuse
and Scheldt and the tidal movements of the Xorth Sea. Tlie average
discharges from the Rhine. Meuse and Scheldt are 2200 m3/sec.
260 mg/sec and 100 m31sec respectively. The original discharge
distribunon over the tidal @lies, prior to thaDelta Project
closures, is given in Figure 2. In the period befere 1965, the
influence of tbe Rhine and Ueuse -tended ta the Eastern Scheldt
estuary. At that time the Delta was Fn a state approaching
morphologioal equilibrium. Until 1970, the amount of sand and silt
brought down by the rivers Rhine and Meuse was ronghly equal to that
Figure 2
Dischatge distribution over the maior rivers 1965 (vduee
in m8/sec)