• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

The Changes in Loughton Brook as it Moves Downstream

Extracts from this document...


Geography Coursework The Changes in Loughton Brook as it Moves Downstream My general aim for this enquiry is to investigate the processes and changes of Loughton Brook as it moves downstream. In order to do this I have chosen three theories to investigate. To conduct my research I visited Loughton Brook in Epping Forest. Epping Forest lies to the north-east of London. It forms a large crescent of land stretching from Wanstead in the south to Epping in the north. The main part of the 19km forest lies on a high ridge of land (a watershed) between the valleys of the River Lea to the west and the River Roding to the east. On top of the ridge are patches of pebble gravel overlying bagshot beds which consist mainly of sand and clay, and at the bottom of the ridge is London clay. The top two layers are essentially free draining while the lower layers are relatively impermeable. ...read more.


The lowest point is at 17m and it is where Loughton Brook forms a confluence with the River Roding. The drainage basin of Loughton Brook is 5.6km2 in total. This consists of 2.2km2 of urban catchment and 3.4km2 of forest catchment. The geology of the complete area consists of alluvium, glacial gravel, pebble gravel, bagshot beds, claygate beds and London clay. The map below demonstrates this more clearly. My first hypothesis is that the width, depth, and velocity of the river will increase as it moves downstream. I think this will happen because river discharge usually increases downstream due to the drainage basin becoming bigger, and therefore the volume of water reaching the channel via tributaries, surface flow, through flow, and groundwater flow increasing. I think that the velocity will increase downstream due to the decrease in number of pebbles and rocks. As the pebbles decrease in number and size, friction also decreases. This means that the river has more energy to flow. ...read more.


A flood occurs when the water in a river overflows out of its banks and leaves the channel. Deposition is often a major factor of flooding. This occurs when a river lacks enough energy to carry its load. Deposition, beginning with the heaviest material first, can occur following a dry spell when the discharge and velocity of the river drop, or where the current slows down. However, flooding can also occur during a wet period when there is simply too much water in the channel. This aspect of my project is related to both physical and human geography as I have also researched the affect of flooding on the local people's homes and businesses. To observe the changes of the river as it moves downstream, I visited three sites along Loughton Brook. The first site was up stream, the second mid stream and the third down stream. I also visited a fourth site which has been artificially straightened to transport the water into the local town. At the first three sites I measured exactly the same things so that I could easily compare them and note the differences that occur as the river travels along its course. 1 ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Hydrology & Fluvial Geomorphology section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Hydrology & Fluvial Geomorphology essays

  1. Geography Coursework: Epping Forest

    The area was a good site for the investigation because it has a field centre, which has information on the river and also because it is local. The river also is a tributary of the river Thames. The ground in the area is mostly soil with leaves covering it.

  2. Study the downstream changes of Loughton Brook.

    ) This map shows the location of the forest itself in relation to the River Lea and River Roding History of the Forest In the past, Epping Forest was used officially as a Royal Hunting Forest. However, local people used it for cattle grazing and as a source for firewood.

  1. Loughton Brook River Studies - Epping Forest

    Method: In this part of the investigation, we measured the river load of the river by using a small container to get some pebbles out of the river , using a metre ruler to find the long axis and by using the Powers' Roundness index we recorded the pebbles Long axis (cm), Roundness index (0-5)

  2. How does Loughton Brook change as it moves downstream?

    After collecting the results we see for any trends and use them to answer our key questions. Then we will see whether the data collected was enough to complete the investigation and to answer the set key questions. We could also explore other ways of improving my work.

  1. I am going to study the characteristics of rivers and how they change as ...

    If two 2nd order streams join up a 3rd order stream is made. The stream ordering doesn't necessarily need to stop at stream order 3; it can go on much higher. That explains how stream ordering is done. The diagram below shows how the stream ordering would look like: I

  2. Whitewell Brook: To what extent does the discharge of the Whitewell Brook agree with ...

    There is a lot more power in the river and with that entire extra load, the stones and boulders in the river will erode the banks and the river floor. Therefore the channel will get deeper and wider. The aim of the coursework The aim of our coursework is the

  1. River channel processes.

    - Making the channel straight in order to reduce flood risk and aid navigation RIVER BANK EROSION- as talked about before rivers erode and deposit on the bed and banks within its channel. The erosion pat of his can be a significant problem, e.g.

  2. Interpretation of why average velocity changes with distance downstream

    Therefore there will be a lower level of water entering the river at that point. The lower section however has no tree to intercept the water and as there are impervious surfaces such as tarmac and concrete. The water which falls will then all run as overland flow into a

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work