Evaluation of flood estimates at ungaged sites using continuous hydrologic simulation and regression equations

摘要

Food-frequency curves derived for ungaged sites in Illinois using various methods are evaluated. The quantile estimates are obtained from an event- and a continuous simulation rainfall-runoff model as well as regression equations. Results from all the methods compared reasonably well at a streamflow-gaging location. However, the continuous simulation model tends to underestimate lower recurrence floods and overestimate higher recurrence floods when compared to the regression equations, whereas the event model tends to overestimate flows at all recurrence intervals, in general, he continuous simulation model has successfully simulated a T > 100 year event, and is further evaluated by using an inundation map.