HYDROGRAPH

A hydrograph is

• a graph showing stage, velocity, or other properties of water flow with respect to time.

• a graph showing velocity, or other properties of water flow with respect to time.

• a graph showing stage, discharge, velocity, or other properties of water flow with respect to time

Is the ascending curved portion of the hydrograph.

• peak discharge

• rising limb

• falling limb

True/False:The shape depends on duration and intensity distribution of rainfall.

• True

• False

Occurs when all parts of basins contribute at the outlet simultaneously at the maximum rate.

• rising limb

• falling limb

• crest

The peak may be

• sharp

• flat

• all of the above

True/False:The shape depends upon the basin characteristics only and independent of the storm.

• True

• False

Is one recorded at a stream gauging site and is a fingerprint of the upstream drainage area’s response to rainfall.

• unit hydrograph

• natural hydrograph

• synthetic hydrograph

Synthetic hyddrograph is

• calculated based on watershed and storm characteristics

• generic combination of many natural unit hydrograph.

• calculated based on watershed and watershed characteristics

True or False? Anything that will increase surface runoff and reduce infiltration and evapotranspiration will cause more flooding by streams.

• True
• False

A storm hydrograph is

• a graph showing the discharge of a river around a particular storm event

• a graph showing monthly average river discharge

• a graph showing rates of infiltration rates following a storm

• a graph showing changes in the size of stores