Abstract:
A design flood in the flood adopted for the design of a structure after oouidsration of eooncuaio eM h7deologto factors. It is seldc economically practicable to design for the ma to probable flood satd after not for the a~azd*ua of record. The design flood is usually *elected by oxftviss of engineering 3*tgeaent after consideration of pertinent facts* The pertinent facts arema ted by stream flow records,
which are either computed ! precipitation eo'ds or ` ► application of hydrologic principles to measured physical factors or directly observed and analyzed to boat appiy to particular situation. Selection of decign flood requires a hydroeooncudo analysis of problon.. Ae the sit* of the daaign flock ,thOirneasee the cap &te, **at also oaaaes. At the ee time probability of dean will deøease. By taking both of those el*ents into consideration ie most economic design has to be found out.
