1 / 16

Desertification

Desertification. Desertification in the Sahel source: NASA Earth Observatory . What is a desert?. Deserts cover about one fifth of the Earth's surface and occur where rainfall is less than 50 cm/year. . World desert's map. Distribution of non-polar arid land. Source: USGS .

cameo
Download Presentation

Desertification

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Desertification Desertification in the Sahel source: NASA Earth Observatory

  2. What is a desert? Deserts cover about one fifth of the Earth's surface and occur where rainfall is less than 50 cm/year. World desert's map. Distribution of non-polar arid land. Source: USGS.

  3. What is desertification? the United Nations Convention to Combat Desertification which defines it as "land degradation in arid, semi-arid and dry sub-humid areas resulting from various factors, including climatic variations and human activities" Cattle concentrated around a waterhole near Bamako, Mali, Africa. From Manfred Schweda.

  4. Desertification in Bara, Sudan due to restrictions on movement of herds of animals. Notice the devegetated areas around Bara. From United Nations Environmental Programme Natural Disasters and Desertification

  5. Is the problem of desertification unique to Africa and is it a new problem? The Namib Desert. Photo: Julien Fauqueur

  6. The Dust Bowl 1937

  7. Desertification does not always happen in an area void of a water source. However, the water source may be so degraded that it is no longer of use to humans.

  8. Risk of Desertification in Europe

  9. Desertification in Austraillia

  10. Desertification is not just the encroachment of giant sand dunes into normally fertile land. It is also the misuse of land through poor irrigation and agricultural practices that creates “dead” soil.

  11. Nope, I don’t have the slides backwards…..under the right conditions it is possible to reverse the effects of desertification. YEAH! Something positive for a change!!!

  12. http://www.loe.org/shows/segments.html?programID=10-P13-00023&segmentID=7http://www.loe.org/shows/segments.html?programID=10-P13-00023&segmentID=7

  13. If this problem in this region can be solved by something so simple, what are other possibilities?

More Related