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

With reference to a flood event you have studied assess to what extent it was the result of intense rainfall rather than physical characteristics of the drainage basin or human factors

Extracts from this document...

Introduction

Thomas Healy L6G With reference to a flood event you have studied assess to what extent it was the result of intense rainfall rather than physical characteristics of the drainage basin or human factors? (15) Carlisle is a large city situated on the flood plain of the River Eden, with three rivers meeting the in the city (confluence). The catchment area of the River Eden is comprised mainly of rural areas, making up 99%, this is in stark contrast to the 1% of urban areas that withhold Carlisle’s 244,000 people. The catchment covers an area of 2400km2 and has a vast history of flooding dating back to the 1700’s. The flooding of much of Carlisle in 2005 affected 2700 homes and killed and killed 3, injuring many more. After the flood had ceased in late 2007 the damage was clear – a startling £400 million. ...read more.

Middle

This is due for a number of physical reasons. Firstly, the area had flooded many times before, leaving the soil saturated and unable to withhold much more water. When the excessive amount of water reached the soil, it simply could not hold it and therefore it existed as surface run-off, transferring most of the water to the channel causing a rise in discharge. The geology of the area did not allow the rainfall to infiltrate as much as was necessary ? Impermeable slate and volcanic rocks in the Skiddaw area, along with sandstone and limestone in the Vale of Eden. These rock types did not allow the water to percolate down through the rocks and thus through flow transfers water to the channel. The steep slopes increase the amount of runoff, along with the fact that many of them were comprised of thin soil as time available for infiltration is reduced. ...read more.

Conclusion

If these human aspects had have been improved the magnitude of the flooding would have been to a much lesser scale. To conclude it seems that the collaboration of intense rainfall, physical and human factors were deadly concoctions that ultimately lead to the flooding of Carlisle. Despite this each played a different role and had a different responsibility for the disaster. I believe the intense rainfall resulted in the flooding; this was the major problem, although the other two factors amplified the situation. My assumption is in line with data collected after the flood with states that: ?67% of the flooding resulted from rivers and watercourses, 25% of flooding was caused by surface water, 8% was due to flooding from sewerage and infrastructure.? The fact that the soil and rock could let the water infiltrate them was a deciding factor but the sheer amount of water that caused the surface runoff, despite flood defences was overwhelming for the area. ...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. Bangladesh flood

    After the monsoon Nepal's roads are six meters under water. The people use boats as cars on canals instead of the normal road use. (Source 4) people in Nepal after the monsoon rains. There is not just the problem of flooding there is also the problem of the rising sea levels possibly due to global warming.

  2. Geography - Ivestigation of the River Colne, Buckinghamshire

    The water table fluctuates with the seasons, and I took my results on one day, in one year, toward the end of august. The river level may change immensely over a year, and the water table certainly does. This would greatly affect my readings were I to come back in

  1. Describe and explain the changes that take place in land use of the River ...

    This changes the land quite a lot. The meanders cause change in the river course. Ox-bow lakes are formed by the large hydraulic action eroding the insides of meanders, cutting of the curve.

  2. To what extent Rothbury fits a model of tourist honeypot

    of buildings we can identify whether rothbury fits to be a honeypot or not. It is also good to know which side are the tourist attractions or shops as the area with all the shop varieties would have more crowd.

  1. 1.1 What are mangroves? 1.2 What are the factors that determine area, diversity ...

    Climate conditions therefore differ between north south. Among climatic factors, temperature, rainfall and wind have the most significant influence on the composition and quality of mangrove vegetation (Hong, 1991). Temperature The mean annual temperature at sea level is about 270C in the south and decreases northwards to about 21 0C in the extreme north.

  2. New Orleans Geology

    These decayed wetlands acted as buffer zones protecting the city. Another major problem which causes easy erosion in New Orleans is that the entire coastline is made up of easily eroded materials such as clays and silts. Over time these materials are broken apart and are deposited somewhere else which will eventually leave the coastline with no protection left.

  1. Boscastle Flood - Info

    At the bottom left of the page is a picture of Michael Jackson. This happy picture serves very little purpose except that it shows his great resemblance with Blanket and reinforces that Blanket is his son. The tone on this page is very sympathetic.

  2. I agree to a large extent with the statement Urbanisation within a drainage basin ...

    and throughflow. This results to less groundwater being present and hence, a decrease in base flows. This leads to a higher and faster discharge after a storm as water would reach the river channel faster by HOF instead of infiltration, SOF or throughflow.

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