A storm hydrograph is a graph to show how and when a rainfall event affects the discharge of a river. The amount and intensity of the rainfall is not the only factor influencing the shape of the ...

A hydrograph shows two graphs – a bar chart showing rainfall and a line graph showing discharge from before, during, and after the rain storm. As you can see in the graph below, the peak ...

Tony adds until the last drop of rain falls, all crests are subject to revision. Here is the hydrograph page from the NWS that Tony uses.