How were the investigations at Sabden Brook and Bury linked to wider geographical models? Flashcards
question for Sabden Brook investigation
investigating downstream changes at Sabden Brook
question for Bury investigation
does Bury have the characteristics of a typical CBD?
subsidiary hypothesis for Sabden Brook
- bedload size decreases with distance from the source
- there is a relationship between hydraulic radius and velocity
subsidiary hypothesis for Bury
- building height increases towards the centre of the CBD
- major clothing and shoes shops cluster in the centre of the CBD
- there’s a relationship between shopping quality and pedestrian density
why do rivers increase in velocity over distance?
more water is added to the river via tributaries=less water is in contact with the bed of the river and banks=less energy used to overcome friction
what is hydraulic radius?
measure of how efficient the channel is at transporting water and sediment . calculated by dividing the cross sectional area by the wetted perimeter
relationship between velocity and hydraulic radius
wider shallow channels have large wetted perimeters. the speed of the water affects the wetted perimeter
why should bedload size decrease over distance?
rivers erode the rocks as the stones are transported downstream. it is transported more efficiently so its eroded more
why does building height increase towards the centre of the CBD?
- high rents result from the competition for land
- flats above shops as people want to be in the centre near everything
why do major clothing and shoe shops cluster in the centre of the CBD?
department stores and specialist shops with the highest turnover compete for prime locations to attract the most business
why is there a relationship between shopping quality and pedestrian density?
pedestrians are attracted to major retail brands that are well known for quality
