Abstract:
For the estimation of design flood for any water resources project, the hydrologist often needs to have a fairly reliable
es1 1 a of design storm. Among the various methods used for the
estimation of design storm the commonly used methods are :
(i ) Depth-duration (DD) analysis
(ii ) Depth-area'duration (DAD) analysis
(iii ) Storm transposition
The depths obtained by any one of these methods are maximised
for moisture content to obtain the probable maximum precipitation
(PMP) estir ,s. Subsequently the PMP values are distributed into
shorter t intervals and arranged in order to get design
sequence the storm at shorter time intervals.
This lecture describeS the physical methods of estimation of design storm alongwith moisture maximisation for estimating the probable maximum precipitation (PMP). Further the technique of distribution of the PMP into shorter intervals would also
described.
