Unit hydrograph is a direct runoff hydrograph resulting from one unit (one inch or one cm) of constant intensity uniform rainfall occurring over the entire watershed. The concept of unit hydrograph is based on linear systems theory and follow the principles of superposition and proportionality.

What is the difference between hydrograph and unit hydrograph?

As a UH is applicable only to the direct runoff component of a hydrograph (i.e., surface runoff), a separate determination of the baseflow component is required. A flood hydrograph is a graph of two axis, 'discharge' and 'time'. ... By looking at a hydrograph, a lot of information and data can be.

What does a unit hydrograph show?

A unit hydrograph is a natural or synthetic hydrograph representing one inch of runoff', uniformly from the watershed during a specified time. In other words, the area under the graph is actually a volume of one inch of runoff.