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The characteristics affecting the flow of a river.

Extracts from this document...

Introduction

The characteristics affecting the flow of a river Introduction This investigation will be based upon what characteristics affect a river. In this piece I will investigate how the stream characteristics change as you go downstream. A specific area has been chosen to study, which is Aberarth. In this chosen site is a river, which is called the river Arth. Aberarth is situated about 2 miles from Aberaeron on the way to Aberystwydd. Its beach is a pebble beach and id surrounded by cliff. It is a small sea side village and may have been a site for fishermen. Now Aberarth is well known for its surf and beach. Hypothesis My hypothesis is that as you go downstream the pebble size tend to be smaller and also more rounder in shape. Furthermore the river channel widens and also deepens; hence an increase in the cross sectional area. The further downstream you go, the less the gradient, i.e. the flatter the land. Also the further downstream you go, the more the number of meanders will be found, as the land is flatter. A further hypothesis would be to say that the more downstream you move the more discharge (amount of water in river). ...read more.

Middle

The soil was very deep and there were many layers, therefore it must have been very old. Furthermore, we found that near the tributary, the soil was mostly organic with lots of leaves and as you go downhill there was more moisture in the soil. Towards the bottom layers of the ground there was lots of silt and clay, I could tell this because I could mould it into different shapes. As we dug it up just as we did the others. Processes like erosion made the channel to widen and deepen and this will investigated. The meanders, which are large bends developed over flat land caused by erosion on one side, where the river flows the fastest and deposition on the other where the river flows slower, were formed and this will also be investigated. Another landform found at Aberarth was interlocking spurs. These are also caused by erosion. Both landforms were formed by erosion of the river, mainly by the sheer hydraulic action of the water or by abrasion of the river bank. In this coursework I will prove the formation of these landforms were caused by erosion. How I obtained my results will also be shown. Working out such as cross sectional area, surface velocity, averages, channel width and discharge. ...read more.

Conclusion

It has probably not thad much time to erode the land scape and make a large flood plain. If I was to do the coursework over again I would definitelly change some aspects of it. Such as apparatus. My group was not presented with proper apparatus and had to make a Climometer usind a pertractor and broom handles. This was very inconvenient for us as it effected our results and meant that it was not a fair test. If we were presented with digital recordinmg equipment for speen angle and size we could have had a far better set of results. If I had time I would have liked to study more that one river in different location this would have meant that I could compare result and come to a better conclusion. I would have also studied more areas of the river to get more accurate information on the river. After doing my course work I now see the reson for it. It has helped me to realize how hard nature is to measure and how important it is to keep records on rivers. Without records we could not predict floding etc. So, River study had safety aspects to it. Graphs Photos The group and some friends measuring the river Me finding a stone to look at Near The Mouth Near The Scource ...read more.

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