Studied by 0 people
How many people can use them?
1200 people and their animals
How long does it take for the sand to fill up?
1-3 seasons
How much water is in each dam?
2-10 million litres
How much of the sand is water?
40%
Negatives of sand dams
Not perfect as it requires rainfall
What is expensive about it?
Steel and cement
How does it reduce death from waterborne diseases?
Sand purifies water and bugs and parasites can’t live in the sand
Water isn’t lost by…
Evaporation
What do sand dams increase?
The water table
Advantages for local people?
Don’t have to spend 2-8 hours a day to collect water, more children can go to school
How long is water available for?
All year round
How is vegetation helped?
Water seeps into the ground and grows vegetation
How is the food supply helped?
More regular, better quality food supply, tree nurseries and vegetable gardens provide food and firewood
