Drainage basin system terms

Question 1

Tributary

Answer 1

• A smaller stream that flows into and contributes to a larger river

Question 2

Watershed

Answer 2

• The boundary of the drainage basin

Question 3

Aquifers

Answer 3

• Underground water stores
• On a global scale they are unevenly distributed. Shallow groundwater aquifers can store water for up to 200 years, but deeper fossil aquifers, formed during wetter climatic periods, may last for 10,000 years.