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

Evaluations of River Coursework

Extracts from this document...

Introduction

Evaluations My first hypothesis stated that velocity of the river increases downstream. This was measured by timing how long it took for an orange to travel 10 metres downstream. There were many problems with this method. Firstly, the orange used was quite heavy, and when in the water, most of it was submerged, therefore it moved more slowly. The orange did not travel at its true velocity. In many places there were twigs, leaves and weeds in the river, thus blocking the oranges path and slowing it down. I tried to make sure that the orange was put in the water ahead of the ten metre measuring distance so it had chance to reach its velocity before measuring began. However there were inconsistencies at each site, and sometimes access to the water was limited and this could not happen. Different people were used on the stop watch; everyone has different reactions and would have stopped the watch according to their judgement about when the orange had crossed the 10 metre line. The orange was difficult to keep in the middle of the river. Although I stated that we would do the measuring in a straight section of the river, this was not always possible, because some sites made access to the river difficult. ...read more.

Middle

This would have ensured that the sites I had chosen typified that stretch of river. This would have made my results and conclusions more reliable. The third hypothesis which I measured stated that the bedload of a river gets smaller and smoother downstream. To measure the size of the bedload, callipers were used to measure the length, width and height of the pebbles. Also, the volume of the pebbles was recorded using a displacement method. The shape of the pebbles was measured using a power scale of roundness. For this hypothesis I believe that my methods were very good, and not much could be done to improve them. Callipers are a good way to measure pebbles, they are easy to use, and far more accurate than a ruler. The displacement water method is a good way to measure the volume of the pebble. However, with this, mistakes can easily be made. One can accidentally put other items from the river into the beaker with the pebble by accident. Also, when the pebbles are very small, this method is crude. The beaker is not very precise, it does not measure to a great deal of detail, and more than one small pebble can accidentally be placed in the beaker. ...read more.

Conclusion

Therefore, the conclusions I have drawn from my studies are not valid on all rivers, it is not possible to automatically assume that the results for the tests will be the same on a much larger river, such as the Nile or the Amazon. However, the most greatly affected hypothesis was discharge. Any tributaries flowing into the River Bourne would have a profound affect on our results, as the river does not carry much water. The drainage basin of this river is a lot smaller, so hardly any water is 'caught' compared to a larger river. My river was only a low land river; it can not be compared to an upland river. It is important to note that you can not assume that the conclusions will be the same. The River Bourne is so small it does not have a proper middle and upper course. Also, as I did not do a pilot study, and only measured the river once in the summer, my results and conclusions could be affected. I went during the summer, where the river would be smaller than normal, as processes such as evaporation would have affected the volume of water in the river. This would have affected all of my hypotheses. Perhaps I should have measured the river at another time in the year. Finally, not all of my hypotheses were actual measurements, some were calculations. I could have actually measured the wetted perimeter for example. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Physical Geography 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 GCSE Physical Geography essays

  1. Geography River Rother

    We will colour in the the land uses in different colour and after wards use a Ten by Ten grid (squared) and count up the number of square for each one and calculate the percentage out of a hundred for each one.

  2. Geography river study coursework - Why do channel characteristics vary downstream at a number ...

    The difference in width between site 1 and site 8 is only 6.4 m. I would expect however that further down the river, towards the mouth, the river would get much wider. 2."The bedload shape( smoothness and roundness) should increase with distance downstream" 3."The cross-sectional area of the river channel increases with distance downstream."

  1. rivers coursework

    because of the load eroding away at the banks allowing even greater corrasion to occur. At meanders and sinuous parts of a river inside river bends require a lot of deposition thus decreasing the water width. Outside parts of the river bend get eroded more due to undercutting from fast

  2. Field investigation around the hypothesis: The River Piddles bed load will become smaller and ...

    Is made from average results, so may not be as precise as is necessary. Average Velocity Float orange downstream at each site for ten metres, and find the average time it took to float one metre. Shows velocity of river at each site, is important to find as has an impact on channel discharge.

  1. Morpeth Coursework

    I was organized by preparing tables for traffic count, 10 pieces of cotton wool in separate bags to test, individually, air pollution, bringing my own clipboard and the appropriate stationary required. We chose 10 different survey sites to test the factors in different areas of Morpeth.

  2. An Investigation Into Kingston Area Shopping Centres and Their Patterns of Use

    The Spearman Rank coefficient also produced further evidence for the correlation to be positive between the two variables; however, there was not sufficient confidence for the rejection of the null hypothesis as the Spearman Rank correlation coefficients and degrees of freedom did not reach the 5% significance level.

  1. Geography - Ivestigation of the River Colne, Buckinghamshire

    Ordnance Survey application, and I further prepared myself by printing off a small scale local map to help me navigate the river Colne, its byways and its access routes on the day I collected my data. Furthermore, because I was unable to borrow a hydro-prop from school, I had to

  2. Geography Coursework, Thailand

    in each city, the traveling agencies would only give them four to five days of trip in Chiang Mai. 3. Tourists would prefer to stay in local hotels than in high-class hotels. Most of the Traveling agencies would provide many packages that include high-class hotels to their tourist, hoping to

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