Water Security or insecurity

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Presentation transcript:

Water Security or insecurity https://www.youtube.com/watch?v=gydWrqw8GKk

Important terms Arable land - land capable of being ploughed and used to grow crops Desertification - the process by which fertile land becomes desert, typically as a result of drought, deforestation, or inappropriate agriculture Drought - a prolonged period of abnormally low rainfall; a shortage of water resulting from this. Deforestation - the removal of a forest or stand of trees where the land is thereafter converted to a non-forest use. Examples of deforestation include conversion of forestland to farms, ranches, or urban use. The most concentrated deforestation occurs in tropical rainforests

Step 1 of desertification Semi-arid region – little but some rainfall Vegetation lives in a fragile state with barely enough to survive

Step 2 Desertification Farming and burning wood in a semi-arid region

Step 3 of Desertification During desertification the natural ground cover (grass and some trees) are either permanently removed or replaced with crops. Crops do not keep top soil in place like natural grass Worst case example in history Dust Bowl – USA 1930s https://www.youtube.com/watch?v=Y6jO8aAF4L0

Step 4 Topsoil is gone Natural water cycles and flora that stores water are disrupted The damage is done and you now have a desert

So where in the world is water becoming scarce? Map of water pressure and projected 2025 Source - National Intelligence Council (US), ODNI https://www.dni.gov/files/documents/Special%20Report_Global%20 Water%20Security%20Map.pdf Homework – read this article and answer questions http://news.mit.edu/2016/water-problems-asia-0330

Vice: India’s water Crisis Vice – sn 3 ep 9 “India’s water crisis” Vice - sn 4 ep 5 “The End of Water” Homework/classwork - “Water map shows billions at risk”

Water closer to home Vice – sn 2 ep 8 - Deliver us from drought Homework – read Climate Scientists Fear Trump May Fatally Undermine Their Work