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

Below is a table that would show us how to grade each river

Extracts from this document...


Stage 3: Collection of data When we went out of school to the sites, and we did seven different tasks at each site. Then, when we came back to our school, we did five more analysis. The table below shows which tests we conducted in the field, at each site, and then it shows the tests that we conducted back in the lab at school. In The Field In The Lab 1 noted signs of visible pollution tested for nitrate levels 2 take photographs tested for ammonium levels 3 measure dissolved oxygen tested for any conductivity 4 measure river speed tested for phosphate levels 5 estimate width of river Tested to see whether there was any detergent in the water. ...read more.


Lots in shallows Several Items Foam Small Odour 3 Brown Abundant Many items Abundant foam Pungent 4 Very Brown Choked Abundant Foam covers river Very smelly Dissolved Oxygen Oxygen inside a river, or any water could be a big problem. It is one of the most important factors in measuring how clean a river is. It can be expressed in percentages, when there is the most amount of water present then there would be 100% oxygen levels. A high oxygen level can be caused from fertilisers running off fields and into the rivers, and it causes an over growth of water plants such as algae, this algae uses up all the oxygen available, and so the other organisms, like fish are not able to get any oxygen. ...read more.


River Speed and Width of River Rivers that have a higher discharge levels would be able to dilute much of the pollution and therefore, they would be able to have a lower visible pollution score, and also better water quality. To measure this discharge, we took measurements of the speed and the river width. We measured the speed of each river by dropping a dog biscuit at a certain point in the river, and we timed how long it took to travel 5m. We did not do a precise measurement for the actual width of the river. Instead we made an educated guess. To obtain both accurate and results, we used three dog biscuits, timing them each, then we took an average of the three. For as accurate as possible results for the width of the river, the same person should make the estimation. ...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. Analysis of Data - Showing what my Graphs show

    Hydraulic action is also likely to be happening as water here is also fast moving. This means that rocks are breaking down quickly and are dragged away from the bed and banks by the force of the running Water itself.

  2. Does the river Alyn follow Bradshaw's model?

    0.231 150 metres 2.44 10.2 2.44/10.2 = 0.238 180 metres 3.19 9 3.19/9 = 0.355 210 metres 2.29 14.8 2.29/ 14.8 = 0.151 240 metres 1.61 9.6 0.12/ 9.6 = 0.17 270 metres 0.50 7.2 0.50/ 7.2 = 0.07 300 metres 1.69 16.3 1.69/ 16.3 = 0.104 330 metres 1.08

  1. How valid is the concept of grade in a river's long profile

    A steep slope is therefore necessary to transport the material. Down-slope the discharge increases while the sediment is finer thus more energy is available, but the losses of energy through friction have not increased proportionately. The sediments can therefore be transported over gentler slopes.'

  2. Geograpgy glendun river

    Floodplain - A flat, low-lying area near a river or stream which is subject to flooding. Gradient- the steepness of the river Interlocking spurs - spurs of high land which over lap in the upper part of the valley

  1. To assess whether the modified channel of the river ash is effective in reducing ...

    Our results might link with the velocity of the river flow. If the river had a high velocity then more erosion would take place resulting in small, well rounded sediment. We would expect this to be the case in the modified channel though the channel is much newer than the

  2. Investigating the river Caerfanell

    of the bank of the river - 2 people take a pole each and stand at their two designated points, 0m and 10m in the river. The person marked at 0m should have the clinometer. - The 2 people should then find a rock tipping the surface of the water

  1. Geography investigation - The River Skirfare located in the Littondale region in the Yorkshire ...

    Why Was It Collected? Strengths Of Method Weaknesses And Improvements Stone Chart- Measures Angularity of bedload. 26th March 2003 Two sections of river. One upstream (Halton Gill), the other downstream (Arncliffe), During the day, 11:00- 14:00 To collect data that will show the angularity of the material on the riverbed at two sections at the river.

  2. Do the Characteristics of a river change downstream?

    Evidence of human activity can be sent throughout the photo above in the form of constructed footpaths or routes that have been overused by humans causing them to be worn down (shown by brown or ashen lines on the map.)

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