A Study of the Changes in River ProcessesThis is a study of the changes in river processes along the longprofile of a river. To study this we will use a sample river. Theriver the study will be based on Loughton Brook, which is a riversituated in Epping Forest in Essex and is also a tributary of theriver Thames. A journey will be made to the river and measurementswill be made at three different sites. The measurements that weretaken will be studied so conclusions can be made about the changes tocharacteristics of a river with distance downstream.Aims and Hypotheses
The overall aim of this study is to investigate the changes in rivercharacteristics downstream along Loughton Brook.
To investigate these changes in more detail a range of hypotheses willbe tested. These hypotheses are:
1. The width of the river channel will increase with distancedownstream.
I expect to find this because in the long profile of a river channelwidth increases. This is because there is a greater volume of water ata faster velocity. This causes more hydraulic power erosion in theriver channel downstream, which makes the channel wider.
2. The depth of the river channel will increase with distancedownstream.
I am expecting to find this because as the velocity of the riverincrease further downstream there will be more hydraulic power erosionwhich will cause the river to become deeper.
3. The wetted perimeter increases with distance downstream.
This is because I expect the depth and width increase so the wettedperimeter must also increase.
4. The gradient will decrease with distance downstream.
I expect to find this because in the long profile of a river thefurther downstream along the river the less high the river is aboveits base level.
5. The velocity increases with distance downstream.
I expect to find this because as the river flows downstream there willbe a larger volume of water.