FLOOD ESTIMATION WITH INADEQUATE DATA

Abstract

Estimation of a flood of desired return period ,is requires in the hydraulic design and operation of water resources projects and other engineering structures. A design flood depends not only on hydrologic date but also on perception of risk and cost to be increased. When sufficient hydrologic data are available then flood frequency analysis can be used. But for several catchments wherein projects are not being investigated, sufficient length of data are not available. Flood. estimation is then to be based on proper interpretation and analysis of the limited data. Adequacy of data has been defined in literature in several ways such as `Hydrologic data can be considered adequate when the marginal cost associated with improving the data is just equal to the marginal benefit resulting from such as improvement. Improvement is equated to reduction in error of prediction....