345
Fig. 10.26 Schematic representation of the hydrodynamics at a typical asymmetrical entrance
(Nielsen and Gordon 1980). The entrance asymmetry created by a single jetty induces a separation
eddy on the ebb tide discharge creating an inlet directed current along the beach, which constricts
the ebb tide flow and contributes littoral drift to the entrance channel. Flood tide flow across the
surf zone bars contributes a considerable amount of suspended sediment to the entrance channel.
Wallis Lake Inlet 1952 (Photograph courtesy NSW Government)
10 Long Term Impacts of Jetties and Training Walls on Estuarine Hydraulics…
Fig. 10.26 Schematic representation of the hydrodynamics at a typical asymmetrical entrance
(Nielsen and Gordon 1980). The entrance asymmetry created by a single jetty induces a separation
eddy on the ebb tide discharge creating an inlet directed current along the beach, which constricts
the ebb tide flow and contributes littoral drift to the entrance channel. Flood tide flow across the
surf zone bars contributes a considerable amount of suspended sediment to the entrance channel.
Wallis Lake Inlet 1952 (Photograph courtesy NSW Government)
10 Long Term Impacts of Jetties and Training Walls on Estuarine Hydraulics…