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

Case Study: Guadiamar River.

Extracts from this document...


Case Study: Guadiamar River On April 25, 1998 At the Los Frailes Mine, owned by the Swedish/Canadian Company Boliden, The dam burst which was holding back the toxic mining waste. Boliden claim that this was due to Seismic shift but other people said that local authorities have received warnings that the Dam was unstable and likely to break. The Wave contained approximately 5 cubic metres of Toxic sludge including the poisonous lead, arsenic, zinc and mercury. The sludge flowed into the Guadiamar River, the marshlands and the Intramurals. The toxins destroyed all life in the stretch of the river. The river of Sludge was finally stopped at the entrance to Do�ana National Park, thanks to the hasty construction of an emergency Dam. ...read more.


Short Term Effects 1. 400 acres of Farmland was destroyed by toxic sludge resulting in �6 million pounds worth of damage. 2. The Guadiamar River was almost completely blackened with sludge. 3. A Great amount of the animals in the river were killed, having knock-on effects throughout the food chain. 4. 400 families had their water supply polluted. 5. Homes by the river were flooded. 6. People living within the effected area suffered itching, rashes and difficulty in breathing. 7. Do�ana National Park was in danger from pollution. Long-term Effects 1. The people lost trust in the authorities for their slow reaction to the disaster 2. If the topsoil is not removed before the autumn rains come they will carry the pollution into the Park. ...read more.


The front of the slide is about 20 metres wide, and it is located in the area of the junction of the two impoundments. 2. The dam cracked and broke 3. Between five and seven million cubic metres of contaminated slurry spilled through the gap. 4. This caused the bed of Rio Agrio to locally rise three metres. They also gave some information about the element concentration in the soil. Element/Concentration of the pyrite sludge: grams/tones Zn 8,000 | Pb 8,000 | As 5,000 | Cu 2,000 | Co 90 | Tl 55 | Bi 70 | Cd 28 | Hg 15 | High pyrite purity 68-78% Very fine granulometry, 50% of the particles are smaller than 8 Microns and particles smaller than 10 microns can be inhaled. All these tell us how serious the problem is in the River Guadiamar, Spain. ...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

    After comparing our graphs to a typical river to see if our hypothesis proven correct or not, 'The River Rother includes all the physical features and land use of a typical river.' It is proven that it does act like a typical river when it is compared.

  2. Boscastle Case Study

    It is estimated that insurance companies paid out about �15 million. Many people were also traumatised and stressed out by this incident and this showed in their mental thinking. People were separated from their families and couldn't contact each other and this cause great worry as families didn't know if their own relatives were safe or not.

  1. Free essay

    milton keynes case study

    The main road going through nether field is Saxon Street. This is the only main road it has and so access to nether field itself is limited. Also this leads only to a few other roads which then lead to the main roads where residents live on.

  2. Comparison between Cambridge park and candie gardens

    The results are below. Age Tallied amount Total Under 25 IIIII IIIII IIIII IIIII IIIII IIIII IIIII 1 36 25-45 IIIII IIIII I 11 45-65 I 1 65+ II 2 Local Visited with school Totals Yes IIIII IIIII IIIII IIIII IIIII IIIII IIIII IIIII IIIII III IIIII IIIII IIIII IIIII

  1. Gunung Gede Pangrango National Park

    measuring tape low to the river so that you can measure much more accurately with a ruler). 5. Once we know the width divide it by 11. Example (width=220) 220 /11 = 20cm. We divide it by 11 because then we have 10 measurements in the river channel.

  2. Case Study on Malvern

    displays and painting of shop front. Finally we assessed the traffic- was the area quiet or busy with congestion including commercial Lorries. We also went back in the summer to the same spot in order to do our assessment again to see if due to seasonal changes there was a difference in our results.

  1. Geography - Ivestigation of the River Colne, Buckinghamshire

    I repeated this process across the bridge to get the entire width in metres. Then I had to measure depth. I thought of attaching a weight, a stone, to the bottom of the tape measure, but then I thought that I could take all the weights out of my velocity

  2. Major Incidents.

    307 people were killed, 400 homes were demolished and 32 000 people had to leave their homes as the pouring water turned estates into lakes. As most of the country slept water supplies were contaminated, farmland areas were destroyed, cattle and poultry were lost and thousands of people were left homeless and grieving.

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