Rational method

There the method used to determine peak discharge in Msma except;

• Rational method

• Time-area hyetograph method

• Time-area hydrograph method

List of uses of design peak discharge except;

• Design pump stations

• Size detention basin

• The route flows to an upstream location

• Predict time variation of flood inundation

The rational method is not recommended for the catchment area is greater than 80 ha.

• True

• False

In the time-area hydrograph method, assume the rainfall intensity is uniform in the catchment area.

• True

• False

What means of ARI.

• Annual rainfall interval

• Annual return interval

• Annual Recurrence interval

• Annual reception interval

What is the range year design for minor system drainage?

• 2 - 10 years

• 11 - 20 years

• 21 - 50 years

• 51- 100 years

what is the 'n' in the time of drainage flow equation?

• Drainage surface coefficient

• Friction drainage type

• Manning roughness coefficient

• Horton roughness coefficient

Runoff coefficient,C by catchment depend on;

• type of land use

• type and size of the drainage

• time of concentration

• Average recurrence interval (ARI)

Empirical IDF Curves can be used to minimize error in estimating the rainfall intensity values from the IDF curves.

• True

• False

what means of 's' in time of overland flow?

• Slope of drainage

• The slope of the overland surface

• The slope of the paved surface

• The slope of the two-point surface