Drainage baisins

Question 1

what type of cycles are drainage baisins?

Answer 1

Open, local hydrological cycles.

Question 2

what is a rivers drainage baisin?

Answer 2

The area surronding the river where the rain falling on the land flows into the river.

Question 3

what is the boundry of a drainage baisin?

Answer 3

The watershed which is where any precipitation falling beyond the watershed enters a different drainage baisin.

Question 4

what type of systems are drainage baisins?

Answer 4

Open systems with inputs and outputs.

Question 5

How does water enter and leave the system?

Answer 5

Comes into the system as precipitation and leaves via evapouration, transpiration and river discharge.

Question 6

What are the inputs of drainage baisins?

Answer 6

Precipitation includes all the ways moisture comes out the atmosphere and is mainly rain or snow, hail and dew and frost.

Question 7

How is water stored in the system?

Answer 7

• Interception: Precipitation lands on vegetation or other structures like buildings, concrete or tarmac before it reaches the soil and it is a significant score of water in wooded areas and is temporary as the water collected may evapourate quickly.
• Vegetation storage: Water that has been taken up by plants and is all the water contained at any one time.
• Surface storage: Includes water in puddles, ponds and lakes.
• Soil storage: Includes moisture in the soil.
• Groundwater storage: water that is stored in the ground, soil or rocks and the water table os the top surface zone of saturation.
• Channel storage is the water that is held in a river or stream channel.

Question 8

What are the flows of water in a drainage baisin?

Answer 8

• Infiltration: Water soaking into the soil and the infiltration rates are influenced by soil types, soil structure and how much water is already in the soil.
• Overland flow: Water flowing over the land and can flow over a whole surface or in little channels and this happens when rain is falling on the ground faster than infiltration can occur.
• Stemflow: Water dripping from one leaf to another.
• Throughflow: Water moving slowly downhill through the soil and is faster through make believe cracks.
• Percolation: Water seeping down through the soil into the water table.
• Groundwater: Water flowing slowly below the water table through permeable rock.
• Baseflow: Groundwater flow that feeds into rivers through river banks and beds.
• Interflow: Water flowing downhill through permeable rock above the water table.
• Channel flow: The water flowing in the river or stream itself.