Drainage Basins And Flooding

Question 1

TRIBUTARY

Answer 1

A small river/ streams into the main river channel

Question 2

SOURCE OF THE RIVER

Answer 2

It is a big/ sponge filled with water, the start of the river

Question 3

MAIN RIVER CHANNEL

Answer 3

The main river, usually the longest and widest part

Question 4

CONFLUENCE

Answer 4

Where two it more river’s meet. This is where flooding often occurs

Question 5

RAINFALL

Answer 5

The amount and type of rainfall affects a river’s discharge. Antecedent rainfall is rain that already happens. This could mean the he ground is saturated so the water becomes run off into the river. Heavy Continual rain means more water flowing into the river

Question 6

WEATHER CONDITIONS

Answer 6

Hot, dry weather can bake the soil so rain water runs straight off into the river. High temperatures increase evaporation rates, reducing discharge. Long periods of extreme cold can lead the frozen ground so rain cannot sink in

Question 7

VEGETATION

Answer 7

Leaves intercept rainfall and delay run off to the river. EVAPOTRANSPIRATION reduces the amount of water reaching the river. Roots delay through flow of water to the river. Roots also take up water and therefore reduce the amount entering the river

Question 8

RIVER DISCHARGE

Answer 8

The amount of water in a river at any given point and time discharge is measured in Cumecs Cubic metres per second

Question 9

ANNUAL REGIME

Answer 9

Also known as river regime. On a graph, if it shows how the river discharge changes throughout the year, then the pattern shown of flow is known as the river regime