Water management Flashcards
what is the percentage of the worlds population that live in places where the demand for water is doubling every 20 years
40%
when can water supply still not mean that sufficient water is available?
it may be polluted and therefore unsuitable to drink
How many children does a lack of safe, clean water kill per day?
4000
Give some examples of surface water sources
Rivers, Lakes and Glaciers
give some examples of groundwater sources and how they can be accessed
Aquifers by wells and boreholes
What are the three main uses of water?
Agriculture
Industry
Domestic
Is water a critical or non critical renewable resource?
Critical- when demand exceeds supply water shortages are a result
What can happen if water use is not sustainable?
- River levels fall
- Wetlands dry out which can lead to bad effects on wildlife
- Conflicts over water
what happens to pollution when river levels fall?
it becomes more concentrated
what are the factors affecting water surplus and defecit?
- Amount of precipitation
- Proximity of rivers
- The presence of water bearing rocks
- Population density
- The level of economic development
- The importance of agriculture
- Temperatures and the amount of evaporation
Give examples of places with a economic and physical water scarcities
Physical water scarcity:Colorado Basin, California
Economic water Scarcity: Sub-Saharan Africa
Give an example of a project which aims to improve the supply of water in area
China’s south-north water transfer project
