Hydrograph

Not to be confused with Hydrography.
A stream hydrograph. Increases in stream flow follow rainfall or snowmelt. The gradual decay in flow after the peaks reflects diminishing supply from groundwater.

A hydrograph is a graph showing the rate of flow (discharge) versus time past a specific point in a river, channel, or conduit carrying flow. The rate of flow is typically expressed in cubic meters or cubic feet per second (cms or cfs). Hydrographs often relate changes of precipitation to changes in discharge over time.[1] It can also refer to a graph showing the volume of water reaching a particular outfall, or location in a sewerage network. Graphs are commonly used in the design of sewerage, more specifically, the design of surface water sewerage systems and combined sewers.

  1. ^ Sherman, LeRoy K. (1932). "The relation of hydrographs of runoff to size and character of drainage-basins". Transactions, American Geophysical Union. 13 (1): 332–339. Bibcode:1932TrAGU..13..332S. doi:10.1029/TR013i001p00332. ISSN 0002-8606.