Graph Descriptions 1 New

Graph Descriptions From source to mouth and from site to site the width of the river increased, ‘site 1’ being the smallest and ‘site 2’ being the biggest,. ‘site 4’ is 14.8 times wider than ‘site 1’ the depth of the river starts quite deep at 21.12cms and then the next site is more shallow at 8cms however form there on the next sites get gradually deeper. ‘site 3’ being 13cms and ‘site 4’ being 19.12cms this making ‘site 1’ deepest and 2.64 times deeper than ‘site 2’. CSA (Cross Sectional Area) The CSA of the river increases downstream. At each of the sites the CSA increases and ‘site 4’ being 22.4 times larger then ‘site 1’ Velocity With the velocity (cork) test the velocity increased form ‘site 1’ to ‘site 2’ largely as ‘site 1’ is 5.2 times higher than ‘site 1’ however from then on the waters velocity only decreases and from ‘site 2’ to ‘site 3’ to ‘site 4’ it decreases quite rapidly. However in the other velocity test with the flowmeter, the results came back differently. The velocity increases from ‘site 1’ to ‘site 3’ but then it drops down again at ‘site 4’. The velocity was lowest at ‘site 1’ and highest at ‘site 3’ and ‘site 3’ was 4.5 times higher than ‘site 1’, this meaning the velocity was higher under the surface of the river but lower on the surface. Discharge The discharge of the river is worked out with the flowmeter test. My graph shows that the discharge consistently increases through-out the sites. ‘Site 1’ being the smallest, and ‘site 4’ being the largest. Load amount My graph shows there was a very high load amount at ‘site 1’ however it rapidly decreased at ‘site 2’ from 17.7 cms to 2.4 cms, then it gradually rose to 3.8 cms at ‘site 3’ and then on to 4 cms at ‘site 4’. The load amount was 4.3 times larger at ‘site 1’ than at ‘site 4’ Load size The load size at ‘site 1’ on my pie charts show that sand is the majority, then stones, then pebbles and the finally gravel. ‘Site 2’ shows the majority is sand, then gravel, then pebbles and then no rocks. At ‘site 4’ the majority is sand again, then pebbles, then gravel and then again no stones. At ‘site 4’ 3 quarters of the load size is sand, then comes stones, then gravel and then hardly any pebbles.

Friction My friction graph shows that from ‘site 1’ to site 4 the friction steadily decreased. At ‘site 1’ there was 2 times more friction than at ‘site 4’ Efficiency The efficiency ratio graph shows that the efficiency ratio of the River Tillingbourne increases from source to mouth. The ratio is 3.2 times higher at ‘site 4 ‘ than it is at ‘site 1’.