7.6 Questions: TRESBP

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 long-shore 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. 

7.1 Questions

1. Because roughly 85% of the Australian population is placed within 50 kilometres of the coast, increased environmental pressure is put on our coastline. This problem needs to be managed by geographers so the development of our coastline is sustainable.

2. The reason they aim to create a sustainable development along the coastline is so that it will continue to last, as such a huge proportion of Australia’s population is on the coast.

3. Changing lifestyles: eg. Moving house from the city lifestyle to the sea, large towns to small, etc.

4. Residential caps to keep population down. 

5. Pollution: urban development. Tourism and recreational pressures: environmental pressure from same “scenic route” driving, flying, vehicle pollution, etc. Population growth: increasing pressure on coastal environment as many country families are moving to the coast and other coastal areas. Overdevelopment:  Environmental pressure from excessive building of large structures such as office buildings and apartment blocks.

6. Geographers provide the correct statistics to ensure that there isn’t too much pressure on the coast from large apartment blocks, which is common in the coastal lifestyle.   

7.2 Model Diagrams