Water Resources WATER RESOURCES

Water Supply Earth is known as the Blue Planet 70 percent of the Earth is covered with water Saltwater cannot be used for agriculture

Factors Affecting Water Supply Precipitation Climate change Pollution Change in the use of land

Precipitations Unevenly distribution of precipitation throughout the world Relation between level of precipitation and availability of freshwater

Mean Global Annual Precipitation

Availability of fresh water in the world

Climate change High temperature means increased evaporation, leading to precipitation Frequent floods and droughts Lower soil moisture

Watermelons were the first water jugs or containers. Africans carried them across the hot deserts so they would always have a drink handy. DID YOU KNOW?

Pollution Supply of freshwater is reduced by water pollution. Waste in the form of rubbish and sewage. Pollution from power plants, factories and mining activities. Chemicals used in agriculture are washed away in the rivers. Water scarcity in developing countries.

Change in the use of land Deforestation leads to more floods Minerals are lost from the water Desertification Evapotranspiration