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

'How does the risk of flooding vary along the course of the River Eea?'

Extracts from this document...

Introduction

The River Eea, Cartmel Peninsular, Cumbria, Northwest England 'How does the risk of flooding vary along the course of the River Eea?' In order to understand what can contribute to a river flooding or what can be done about it I used the River Eea, located south of Lake Windermere in the Lake District, Northwest England (see fig. 1). I used four sites along the course of the River Eea, starting at Ayside Tarn near the source of the river Eea and finishing near the mouth at Cark Farm. At each site I took a number of various readings to help me with my studies, finding out how flooding varies along the course of the River Eea. These readings included data such as the velocity of the river, the width, and the depth at set intervals across the width. I also took readings such as the management strategies in use, the gradient of the river, and the land use along the course of the river. I collected this data because these are the main factors that contribute to flooding. I will give these factors a score on a scale of 1 to 5 at each site so that I can compare the risk of flooding at each of the four locations. 5 will mean that the location is very likely to flood and 1 will mean the site is very unlikely to flood. A total score out of 25 can then be given to each site. The wetted area is the amount of water in the channel so this will get a high score if it is a high number. ...read more.

Middle

Here, at High Cark Bridge, the river had a gradient of 4? and width, depth and velocity as follows: Width (m) Depth (cm) Velocity (flow rate in seconds) 0 0 0.5 21 16 1.0 0* 18 1.5 34 25 2.0 27 Average Velocity 19.6 *Here there was a large rock one metre across the river. It stuck out of the water so here our reading for depth is 0cm. Here is the channel profile for site 2: Factors of Flooding Score (on scale of 1 - 5. 1 being very unlikely to cause flooding) Wetted Area 2/5 Velocity 5/5 Hydraulic Radius 4/5 Discharge 1/5 Flood Prevention Schemes in Place 5/5 Total Score 17/25 Factors of Flooding Score (on scale of 1 - 5. 1 being very unlikely to cause flooding) Wetted Area 3/5 Velocity 4/5 Hydraulic Radius 4/5 Discharge 2/5 Flood Prevention Schemes in Place 2/5 Total Score 15/25 The wetted area for this site is 0.4m2. For this site the wetted perimeter is 1.2m. The hydraulic radius here is 0.333. Discharge at this site is 7.84m3/sec Cartmel Centre is Site three (see fig. 4). Here the River Eea runs through the town of Cartmel. This area is a large settlement; therefore it needs protecting from the risk of flooding. There are lots of houses here along with a range of recreational activities including pubs, shops, playing fields and a horse racing track. The river has been straightened and widened to increase the velocity of the river running through it, as it will then help prevent the flooding of Cartmel. ...read more.

Conclusion

There were a few limitations that I have come across while carrying out my investigation. These included: * The level of accuracy, as the results that I got may not have been very accurate. For example, when measuring the gradient, I used a clinometer. This was to be accurate to 1?, and only if you had a steady hand and something or someone the same height as you to aim it at. * It was also difficult to get an accurate reading on the velocity as the velocity of the river changed throughout the width of it. * The reliability of the scoring system, as it may not of been constant for each site as there was no set value to compare them with and it did not include every factor that could contribute to flooding. * Other factors that could cause flooding, there are other factors such as the geology of the land and the amount of vegetation etc, that I have not collected which could alter my investigation. To try to improve my investigation I could of visited more than four sites. This would then allow me to take more readings. Or if given more time I could visit more than just the one river. I would then be able to see if this pattern was just a one-off, or if it is the same for most rivers. This piece of work only looked at one river system out of hundreds around Great Britain, although they all have similarities between them all, each one will be individual and have different qualities. 8 ...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. Marked by a teacher

    Analyse How the Inputs and Outputs from a River Basin Can Vary Over Time

    3 star(s)

    the day goes on and the temperature increases, so does the rate of evapotranspiration. Seasonally, the rate of transpiration is higher in the summer months as the temperatures are traditionally higher during this period. Man has had an influence in afforestation and deforestation which also affects the transpiration levels and river basin outputs over time.

  2. 'To what extent does the River Lyn conform to the Bradshaw model of River ...

    Certain rocks might not have been picked because of the wildlife on them. If I did this again I would find a better way of picking out rocks at random, or I could use a piece of apparatus like a bedload trap which sits in the River, and collects the rocks flowing past it.

  1. How does the Efficiency and Cross-Sectional Area of a River Change Down Stream?

    Because of the method of throwing a dog biscuit into the river, it was easy for it to get caught by rocks and foliage hanging over the stream, and easy for it to be caught by the current. If this test were to be done properly, a flow metre would

  2. Study the downstream changes of Loughton Brook.

    It had rained the day before so water levels were higher than normal. The ground around it was muddy too so we may have had a problem measuring the wetted perimeter. The surface velocity had certainly increased due to the higher discharge and therefore more river energy.

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

    Count how many seconds it will take to reach the10 metres destination. c) You will need a stop clock. d) Report it for 5 runs. FLOWMETRE VELOCITY: Equipments: Flow metre, stop clock. a) Put the flow metre, just below the surface of 5 equally distance points (1/6,2/6,3/6,4/6,5/6).

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

    14.6 1 1.02 8 7 49 6.65 10 0.99 9 1 1 8.6 6 1.66 2 4 16 4.4 15 1.63 3 12 144 7.6 9 0.33 15 6 36 6.2 13 0.72 13 0 0 = 506.5 Width Rank Velocity Rank D D 9.2 4 0.38 12 8 64

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

    worked in groups of three to gather information, such as: The width of channel from bank to bank (we used a tape measure which one person held on one bank and the other person drew across to the opposite side.)

  2. The Management of Rivers in Developed Countries to Prevent Flooding.

    held back a significant amount of water and without them, the damage would have been a lot more. A form of management on the River Tees, England was the Tees barrage. It took four years to build and contains 650 tonnes of steel.

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