22-12-2012, 12:27 PM
ASSIGNMENT PRESENTATION ON INSTANTANEOUS UNIT HYDROGRAPH
ASSIGNMENT PRESENTATION.pptx (Size: 96.26 KB / Downloads: 53)
UNIT HYDROGRAPH:
The hydrograph of direct runoff resulting from unit depth of rainfall excess
occurring uniformly over the basin and at uniform rate for specified duration.
INSTANTANEOUS UNIT HYDROGRAPH
Instantaneous unit hydrograph is the limiting case of the unit hydrograph of zero duration.
It is fictitious , conceptual unit hydrograph.
It represents the surface runoff from the catchment due to an instantaneous precipitation of the rainfall excess volume of 1cm.