7.3 Coastal Geographical Processes

1. It was necessary to extend the Tweed River breakwaters because silt was being deposited at the river mouth and was clogging it up. 
2. Severe storm erosion added onto the effect of the breakwaters would mean that it would take a long time for the removed sand to return to its normal position on the beaches.

3. The Tweed River became unsafe to shipping because the silting caused the sandbars on the ships routes to be higher, making the water shallower. The natural process that caused it however was longshore drift. 

4. The dredging of the Tweed River and the associated beach nourishment program was only a short term solution as it was not efficient or sustainable for the environment.

5. The sand that is built up on the sandbank is pumped through a series of pipes, under Tweed River and is released at one of four deposit points.

8. The mouth of the river has extended further out as time has gone on and the mouth of the river has moved more to the right of the photograph.