Global water supplies vary due to differences in worldwide rainfall patterns. Some areas receive significant rainfall and have water surpluses, while other regions experience water deficits due to lower levels of rain. A variety of factors influence global precipitation levels, leading to disparities in available freshwater resources around the planet.

1. Why do water supplies vary?
UNIT 2

2. Specification detail
 5.1d Water surplus and deficit on a world scale,
related to global rainfall patterns.

3. Why do water supplies vary
 World Water Supply: Here

4. Choropleth mapping
 Which areas have the most Continent % of population who
have access to safe
access to safe drinking drinking water
water? N.America 99
 Create a key on your map
for the following S.America 75
categories: Europe 99
 0-20
 20-40 Central Asia 39
 40-60 North Asia 95
 60-80
 80-100 South Asia 59
 Shade in the areas on your N . Africa 10
map (using one colour) C & S Africa 65
according to the table
Oceania 99

7. Rainfall

8. Extension
 Describe the distribution of water around the
globe
 Give reasons for this distribution