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"The Hydrological Study Of the River Conwy"

Extracts from this document...

Introduction

GCSE Coursework "The Hydrological Study Of the River Conwy" This project will study the transition of the River Conwy as it flows downstream. It will concentrate on the following variables: * Water Width * Depth * Wetted Perimeter * Gradient * Flow Velocity * Float Velocity * Stone Roundness * Stone Size Another variable we could have measured is the pH value of the water in the river. This would have detected pollution levels as it goes downstream. These 8 variables will provide us with the sufficient information. Aims The aims of the project are: 1. To investigate changes in the channel form and river processes at different sites downstream on the River Conwy. 2. To identify landforms associated with river processes Hypothesis The following hypotheses were tested: 1. Downstream, the width will increase. 2. Downstream, the depth will increase 3. Downstream, the velocity will decrease 4. Downstream, the cross sectional area will increase 5. Downstream, the discharge will increase 6. Downstream, the gradient will decrease 7. Downstream, the wetted perimeter will increase 8. Downstream, the bed load size will decrease 9. Downstream, the bed load roundness will increase. ...read more.

Middle

One person has an instrument that measures the angle of the gradient 3. Find a point on the pole that is in the same place on the other pole and measure the angle from that point to the other point. Limitations: 1. Making sure your view is squared to the other post 2. Making sure the post is on the water surface Justification: The gradient is important to measure because if the angle is higher upstream than it is downstream then there will be other changes downstream and that is what we are looking for. Float Velocity 1. One person must have a stopwatch, another must throw in the float and another must catch the float. 2. On the ends on the 10 metre segment a cork must be thrown.(From upstream to downstream) 3. The person catching the float must be downstream. 4. Once the float is thrown and reaches the first post the stopwatch must be started. 5. When the float reaches the other post downstream the stop watch must be stopped 6. Record the time Limitations: 1. Cork gets stuck/ caught by certain obstructions 2. ...read more.

Conclusion

We were limited to how many times we saw the river. We only saw a snapshot of the river. We could have improved the results by: 1. Going back every season to see if there are any key changes that have taken place. 2. Having more sites downstream 3. We could have made more measurements using a different set of equipment such as measuring the gradient with a dumpy level. 4. Take the pH reading of the river, this would have told us the pollution level of the water in the river. 5. We could have checked the river life with indicators such as small animals/insects that can only survive in very clean water, or can survive in all waters. 6. We also may have compared the Conwy to another river; perhaps the Roding would have been good as it is near and will be interesting to see how the different rocks and the different climate will affect the river. My skills learnt: I think my skills have developed enormously after going to the Conwy sites. I am now much more precise with my readings and my teamwork skills are much more effective now. I can now carry out an experiment on a river and will be confident that my results would be accurate. 3 ...read more.

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