1.4 Flashcards
Lowest point in a watershed.
Outlet
A very small space between particles.
Interstices
It predicts the peak flow rate of runoff down to watersheds.
Rational Method.
Runoff coefficient which ground slope is between 2% and 10%.
Rolling
Runoff coefficient which ground slope is greater than 10%
Hilly
Runoff coefficient adjustment factor for 10 years or less.
1.0
Runoff coefficient adjustment factor for 25 years.
1.1
Runoff coefficient adjustment factor for 50 years.
1.2
TRUE OR FALSE
The runoff coefficient is assumed constant before a storm event.
FALSE.
Correct Answer: During a storm event
Defined as the time for a wave of water to rpopagate from the most distant point in the basin to the outlet.
Time of concentration