In this study, the hydrological changes due to urbanization were investigated and fundamcntal theory and characteristics of typical urban runoff model such as CHICAGO Model was studied. Above model was applied for urbanizing Dongsucheon basin, Incheon. The main parameters(CI, CP, CS) which are included in this model depending on runoff rcsults were determined, and dimensionless values such as total runoff ratio(QTR), peak runoff ratio(QPR), and runoff sensitivity ration((QSR = QTR/QPR) were estimated in order to evaluate and compare the characteristics of model based on relative sensitivity analysis. Finally, applied model was proposed based on under-standing of work types and established urban runoff models which can simulate well for areal development patterns and urban river basin.