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

River course project.

Extracts from this document...

Introduction

Map of Area List of Apparatus * Chain * Clinometer * Net * Bucket * Tape Measure * Measuring Poles * Flow Metre * Ruler (1 metre) * Dog Biscuits * Stop Watch Aims * To measure the length of the wetted perimeter * To measure of the river * To measure the depth of the river at five different intervals * To study the velocity of the river at five different intervals * To measure the gradient of the river * To study the level of pollution in the river Methods Used Wetted Perimeter Measuring the length of the river 4 sites along Afon Conwy 10m sections. A chain (red) and a tape measure were used to work out the wetted perimeter. The chain from the water surface on one bank was taken to the opposite bank and the length of the chain was measured. Measuring the Wetted Perimeter (above) Width Measuring the Width (below) A tape was used to measure the water surface on one bank to the water surface on the other bank. ...read more.

Middle

(Hypothesis 6) Hypothesis 1. The width of the river will increase downstream 2. The steeper the gradient the faster the velocity 3. The depth of the river will increase downstream 4. The stone size will decrease downstream 5. The stone roundness will increase downstream 6. Due to more pollution downstream there will be less variety of invertebrate life Results All the above 6 graphs are linked to stone roundness. The very angular and angular graphs show a steady decrease in these stones until site 5, and 6. Sub angular stones show a steady increase until site 4 and 5 where there is a massive decrease. Sub rounded stones show a large increase in site 3. Rounded stones show a steady increase up and till site 6 where there is a large decrease in the stones. Well rounded stones show an increase in site 4 and 5. This data does not show a regular pattern, this could be for a variety of reasons such as the river narrowing, slowing the velocity so that Abrasion is less affective. (Hypothesis 5) ...read more.

Conclusion

Site 4 and site 5 have a greater amount of rounded stones than site 6, which has more angular and sub angular stones which I didn't expect since it was our last site on the river Conwy, site 6 has a high gradient and fast velocity, and was over 37 metres wide. The anomalous results for site 5, 6 lead me to the conclusion that because these sites were secondary data given to us by the field centre and collected by another school, the data may of not been collected properly, it could have been a different time of year therefore altering everything such as velocity, the amount of pollution in the river, the variety of invertebrate life etc. I must express the limitations of the evidence I collected, we only took primary data from 4 sites along the river Conwy, which for a +27km river is not a lot of sites therefore the anomalous results could have been because of certain sites, in a small stretch of river, I would of needed more time, research, and further sites along the Conwy river to get more accurate and meaningful results. ...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. Hydrology and Fluvial geomorphology. (Q&A)

    The two lines or curves marked on the diagram show the speed at which different sized particles will be eroded, transported and deposited. The mean or critical erosion velocity gives the velocity at which material will be picked up by the river and transported.

  2. This project will study about the way the river Conwy in north Wales changes ...

    Very big d) Stone size suite clay e) Has lot of energy f) Too deep g) Strong currents Human error a) Farmers used as field, which ideally results in marshy and salty area They built bridges which is lowest bridging point b) They built train line c) Industries were built in the cheap land SITE DESCRIPTION SITE 1 The things I have found in the site 1 a)

  1. The river Gwaun: Investigating how the course of the river changes from the source ...

    over/under 10 metres probably happened, but also instances such as when measuring speed the tennis ball was stuck behind a rock, anomalous results, etc. can wreck the investigation's results, which is why measures such as taking averages and repeating ones that went (horribly)

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

    Dis from S by Gradient Graph The graph above shows the Gradient by Distance from source. As you can see from this line of best fit the Gradient decreases as we move downstream. It has a fairly strong negative correlation.

  1. My hypotheses are:The character of the course of the River Bollin will change along ...

    of the powers roundness index * Metre ruler * Cork and stop watch for velocity * Pencils and pens * Clinometer to measure inclination (slope/gradient) Site 1, Macclesfield Forest After driving for a long time uphill through narrow old roads and villages, we passed reservoirs and lakes as we made our ascent to the forest.

  2. Geograpgy glendun river

    where river mouths are overloaded with sediment, causing the main river channel to split into lots of smaller tributaries, but this can only happen when there are certain things e.g. The river must be carrying a lot of sediment. Features include: alluvium deposited, levees and large discharge Glossary Alluvium -

  1. Investigating the river Caerfanell

    laid tape measure along the river bank - Take the beginning tape measure and nail it down with the metal pin at 5m where the water has started to touch the riverbank side. - Someone with the other end of the tape measure walk across the river to the other side.

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

    Sampling is obviously less accurate than testing a whole population but it saves a lot of time and can still help to show general trends and relationships. The larger you can make the sample the more accurately it is likely to reflect the whole population.

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