Is there a water problem? Approximately 70% of the Earth’s surface is covered with water. The absolute quantity of water has not changed over the years. Then why are we talking of a water crisis? Why do we need to conserve water?
If all the world’s water could fit into a bucket Water available for drinking would be less than a teaspoon Sustainable freshwater supply for human use = 0.01% Recommended activity - A drop of water Salt Water = 97.5%
Mismatch between regions of large population and available freshwater resources Fresh Water Stress By 2025 2 / 3 of the world’s population estimated to be underwater-stress conditions. 3 billion people may be affected by water scarcity . Source: http://www.unep.org/dewa/assessments/ecosystems/water/vitalwater/21.htm#21b
The total amount of water in the world is the same, but there are more people wanting to use this water 1940 World population doubled ( increased by 3 bn ) Freshwater use increased more than 4 times 1995 Population and water Resources There is just not enough water!!!! 2050 Estimated population increase = 2.7 bn
Every item that we use needs water for production CAUSES FOR WATER STRESS Water evaporation from reservoirs of large hydro power projects Domestic Extensive farming. High usage of water Industry Increase in Population Water stress!!!! Power Agriculture People require food to eat Increased demand for goods bathing, flushing, washing, cooking, drinking…
Global water use by Sector Evolution Of Global Water Use Withdrawal And Consumption By Sector Source: http://www.unep.org/dewa/assessments/ecosystems/water/vitalwater/15.htm , accessed November 2008
India, with more than a billion people, needs a lot of water to grow food for its population Agriculture Source: http://www.unep.org/dewa/assessments/ecosystems/water/vitalwater/15.htm
Lakes, tanks and ponds being destroyed. Land filled for construction purposes.
Unsustainable extraction of groundwater in urban areas, affecting groundwater quality.
Receive sewage that cannot be handled by sewage
Disposal of solid and liquid wastes
above or into groundwater
Additional stress in urban areas For more details refer to the presentation on ‘ Water resources of our city ’
SO… Is there a Water Problem? Yes , there definitely is. There is a greater demand for freshwater Freshwater resources are being polluted and are therefore unfit for consumption Skewed distribution of population and freshwater resources leads to unequal access
India – status and projections 1 / 6 of World’s Population 1 / 25 of world’s Freshwater Resources Source: TERI
Dumb Charades A game to check how much you have learnt Play
Divide the class into 5 teams. Team A selects 2 people who will guess the answer. These 2 people turn their face to the wall or go out of the room, so that they can’t see the clue. Play
Team A have to act out the clue for the 2 guessers. Either all members of Team A can act it out (very boisterous, but all children are involved) or a representative is selected to do the acting. The other members of Team A (and the rest of the class) see the clue.
If the guessers got the right answer in 30 secs, they get 5 points If the guessers get the right answer in 60 secs, they get 3 points Otherwise The chance then goes to Team B and so on. Rules: No mouthing of words
Round 1 Team A – Team B – Team C – Team D – Team E – Ready ? Agriculture Domestic use Reservoir Population Industrial production
Round 2 Team A – Team B – Team C – Team D – Team E – Unequal access Over exploitation Urbanization Lifestyle Lake destruction