Development of Computer Program for Linearized Subhydrographs Method for Urban Runoff Determination

Abstract

A model for the simulation of urban runoff based on Linearized Subhydrographs Method of Urban Runoff Determination is developed for the planning and analysis of converging stormwater drainage systems in small and large urban areas. The Model simulates hydrographs for both continuously recorded rainstorm events and synthetic design hyetographs. The model is applied tc various urban watersheds with differing land use characteristics utilizing recorded hyetographs. The simulated hydrographs are then compared to recorded hydrographs. The results indicate that when single event hyetographs are utilized, the simulated hydrographs for both the inlet and pipe conditions compare well to those results obtained from measured values. The model structure and input requirements needed for the utilization of the program are presented. The limitations of the model are examined, and future research to improve this method is included.