River Discharge And Flooding Flashcards
What is surface run-off?
When water flows on the surface of the Earth.
What is interception?
When precipitation lands on vegetation.
What is infiltration?
When water seeps from the surface into the soil.
What is percolation?
When water seeps from the soil into permeable rock.
What is ground-water flow?
Water flowing through permeable rock.
What is throughflow?
Water flowing downhill through soil.
What is river discharge?
The volume of water flowing in a river per second.
What is river discharge measured in?
Cumecs.
(m3/s)
What does a hydrograph show?
How river discharge changes overtime.
What does a hydrograph show?
How river discharge changes overtime.
What do the bars and curve represent on a hydrograph
The bars represent rainfall.
The curve represents river discharge.
What is the lag time?
The time delay between the peak rainfall and peak discharge.
How do impermeable rocks affect floods?
Impermeable rock will cause floods faster because less rock absorbs water.
What is the rising limb?
The increase in river discharge.
What is the falling limb?
How long it takes for river discharge to fall back to base-flow.
