Development of Rainfall Ifd Relationship for Mulde

Rainfall intensity-duration-return period equations and nomographs on regional basis are required in the country for design of soil conservation and runoff disposal structures and for planning flood control projects. The significance of rainfall intensity-duration-return period analysis is also important from economic consideration. An over designed structure involves excessive cost and under designed structure will be unsafe and also involve high recurring in expenditure on repair, maintenance and replacement. An appropriate design would provide a structure with reasonable initial and maintenance costs. In order to have optimisation in hydraulic design of any structure, the peak rate of runoff expected for the recurrence interval should be correct. For the same it is very essential to have the knowledge of rainfall intensity-frequency-duration relationship for a particular location. During study, our main objective was to determine the location constant of rainfall intensity-frequency-duration equation for Dapoli and to develop the station nomograph for Mulde.