CHAPTER 12.0 IntroductionThe use of unit hydrographs for the development of hydraulic structures in a river watershed plays an essential role. For catchments for which there is no readily available information on precipitation and runoff patterns over the river catchment, storm hydrographs cannot be derived. Therefore, synthetic methods are used.2.1 Background of the StudyThe unit hydrograph is a concept that can be used to establish the peak discharge rates of a river from precipitation. Generating unit hydrographs requires knowledge of precipitation and runoff data that are used to develop storm hydrographs derived from established methods. Storm hydrographs are used to develop hydraulic structures such as dams, culverts and many others within the watershed studied. (Ayanshola et al., 2006, E.Todini, 2007)2.2 Research problem and objectivesThe development of a unit hydrograph depends on the available precipitation and runoff data, unfortunately all these data are not easily available and a synthetic unit hydrograph was developed and determined...