1. Map Reading Exercise on River Basin

2. Find the average gradient of the river.

3. Gradient= Height difference / Total length Height difference=?
(600-0)m
Total length = ?
21cm
Scale = 1:50,000
1cm = 50,000cm = 500m
(21X500)m=10,500m

4. differences in fluvial processes between X and Y.

5. differences in fluvial processes between X and Y.
There is more erosion in X than Y.
The main fluvial process at X is erosion but at Y is deposition.
There is mainly vertical erosion at X but lateral erosion at Y.
There are more transportation and deposition at Y than at X.

6. difference in average velocity between X and Y
The velocity at X is low.
The average velocity at X is lower than Y
Because the discharge at X is smaller than Y.
The roughness at X is greater than Y.
The friction at X is higher than Y.
More energy at X is used to overcome the roughness.

7. Hydrograph after hillfire
Time
Discharge(m3/s)

8. The living of the farmers
My living is affected.
The production is affected.
My fields/farm and house will be drowned.
There will be crop failure because there is not enough water for irrigation.
The crop production will drop.
There will be loss of life and properties.

9. 83
Scale 1:20,000

10. 3 Sections of a River 224834 to 220830 220830 to 215826
Grid Reference
Gradient
River Course to to to
Upper course
middelecourse
Lower course
1 in 2.26
1 in 5.91
1 in 60