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Irrigation & its stakes An essential resource Walid FekiriM2PES 2009/02/26.

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Presentation on theme: "Irrigation & its stakes An essential resource Walid FekiriM2PES 2009/02/26."— Presentation transcript:

1 Irrigation & its stakes An essential resource Walid FekiriM2PES 2009/02/26

2 Presentation  Irrigation in the world  Techniques of irrigation  Gravity systems  Sprinkling  Micro-Irrigation  Consequences of a mismanagement of irrigation  The Aral Sea  Circular irrigation in Algeria  Conclusion & Perspectives  Irrigation in the world  Techniques of irrigation  Gravity systems  Sprinkling  Micro-Irrigation  Consequences of a mismanagement of irrigation  The Aral Sea  Circular irrigation in Algeria  Conclusion & Perspectives

3 Irrigation in the world  70 % of the fresh water is used for the agriculture.  1/3 of world food-producing.  In 30 years, a rise from 200 to 300 million of hectares.  An increase, particularly in Asia & Pacific.  70 % of the fresh water is used for the agriculture.  1/3 of world food-producing.  In 30 years, a rise from 200 to 300 million of hectares.  An increase, particularly in Asia & Pacific.

4 Gravity Systems  The easiest technique of irrigation  The most used in the world  Doesn’t need any energy  Low Cost  Sometimes, recharching the aquifer  The easiest technique of irrigation  The most used in the world  Doesn’t need any energy  Low Cost  Sometimes, recharching the aquifer  Very water-consuming  Efficiency about 50 %  A lot of water loss  Problem of diseases

5 Sprinkling  Sprinkling consists of a reproduction of the rain  Careful management of water  Create a microclimate around plants  Efficiency about 70 %  Sprinkling consists of a reproduction of the rain  Careful management of water  Create a microclimate around plants  Efficiency about 70 %  Important investment  About 2000 € / ha  Wind Sensitive  Evaporation sensitive  Needs energy  Needs specific materials

6 Micro-Irrigation  Create a water bulb around roots  The Most technological techniques  Efficiency 90 %  Great precision  Careful management of water resource  Create a water bulb around roots  The Most technological techniques  Efficiency 90 %  Great precision  Careful management of water resource  Very Important Investment  About € / ha  Needs a specific materials  Problem of Soil pollution

7 Consequences of mismanagement: The Aral Sea  Situated between Ouzbékistan & Kazakhstan  Area reduces about 75% from 1960 to 2004…  Supplied by 2 Rivers the Amou-Daria & the Syr-Daria.  Situated between Ouzbékistan & Kazakhstan  Area reduces about 75% from 1960 to 2004…  Supplied by 2 Rivers the Amou-Daria & the Syr-Daria.

8 Circular irrigation in Algeria  At the gate of the desert.  Irrigation by sprinkling pivot.  Pumping in the deep aquifer.  Irrigation permits a recharge of the superficial aquifer  Hydrostatic level goes up  Water becomes stagnant  So water becomes unsalubrious.  Problem with vegetables death and poor water quality.  At the gate of the desert.  Irrigation by sprinkling pivot.  Pumping in the deep aquifer.  Irrigation permits a recharge of the superficial aquifer  Hydrostatic level goes up  Water becomes stagnant  So water becomes unsalubrious.  Problem with vegetables death and poor water quality.

9 Conclusion & Perpectives  Irrigation very closed to:  Economical stakes.  Environmental stakes.  Better management of irrigation:  Careful management of water resource  Reduce water loss (wind, evaporation, percolation…  Globally better management of water resource:  A very sensitive resource.  Irrigation very closed to:  Economical stakes.  Environmental stakes.  Better management of irrigation:  Careful management of water resource  Reduce water loss (wind, evaporation, percolation…  Globally better management of water resource:  A very sensitive resource.

10 Thank you for your interest !!

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