rivers & ecological problems
DESCRIPTION
Rivers & ecological problems. Made by Florence , Marie, Delphine, Sarah, Lara, Laurence, Aurélie. 1. The Lys (Leie). Some information …. * Source : North-France, Lisbourg * Mouth : Gent, The Scheldt (Schelde) * Length : 202 km (109 km in Belgium) - PowerPoint PPT PresentationTRANSCRIPT
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Made by Florence, Marie, Delphine, Sarah, Lara, Laurence, Aurélie
Rivers & ecological problems
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1. The Lys (Leie)
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Some information …
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* Source : North-France, Lisbourg
* Mouth : Gent, The Scheldt (Schelde)
* Length : 202 km (109 km in Belgium)
* Country border Belgium & France (24 km)
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Functions (the Lys)
* Agriculture : flax
* Buffer
* Water depository (against floods and aid for agriculture
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History (the lys)
* Spinning and weaving of flax
* Favourite place for paintors
* 3 battles ( Allies German Army, WWI & WW2 )
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The Scheldt
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Some information…
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* Source: Gouy-Le-Câtelet ( North France )
* Mouth: across Antwerp, towards the Northsea
* Length: 350 km (138 km canalised )
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Functions
* Employment at the harbour of Antwerp
* Transport (-> navigation)
* Carrying of surface water, household water and industrial waste water
* Important agricultural, ecological
* Drinking-water
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History
* Commercial and strategic importance
* Border between West & East empire
* Closed (Spanish control)
* Opened (French Revolutionary, 1972)
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Problems
* Collapsing of the dikes
* The biodiversity
* The Water level of the Scheldt
* Floods
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Collapsing of the dikes
Solutions:* To Reinforce the insides of the dikes
* A stability system
* A reinforced concrete wall
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The level of the water
Solution:* Dredging the river
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Biodiversity decreases
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Biodiversity decreases
• Balance of nature
• Endangered species
• Problems for human life?
Most important causes
Problems
• Pollution
• Climate changes
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Biodiversity decreases
Solutions
• Pollution: - Green energy - International agreements (Kyoto) - Clearing water - STOP dumping of chemical waste
• Climate changes:- Green energy- International agreements (Kyoto)- Decrease of energy
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Floods
Problems
• Death
• Damamage
• In- or exclosure
Solutions
• Dams• Locks• Decrease of energy• International agreements• Green energy
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Floods