(ai) Highlight two ways in which water resources are classified (ii) in what three ways can water resources be used? (b) Describe three ways by which man's ...

(a)(i) Two ways in which water resources are classified

• According to source/location: surface water (rivers, lakes, seas) and underground water (springs, wells, aquifers).
• According to salt content: fresh water (rivers, lakes) and salt water (seas and oceans).

(ii) Three ways water resources can be used

• For domestic use (drinking, cooking, washing).
• For agriculture, especially irrigation and watering of livestock.
• For industrial use, for the generation of hydro-electric power, and for transportation and fishing.

(b) Three ways in which man's activities limit the use of water as a resource

• Pollution: The discharge of industrial waste, sewage and oil spillage into rivers and seas makes the water unfit for drinking and harmful to aquatic life.
• Deforestation and poor farming: Clearing of vegetation and bad farming practices increase runoff and silting, which reduce the volume and quality of water in rivers and reservoirs.
• Over-abstraction and damming: Excessive withdrawal of water and the building of dams upstream reduce the amount of water available to downstream users, sometimes drying up rivers and lowering the water table.