flood plain information south creek, north creek, catfish - Sarasota ...

FUTUREFLOODSFloods of the same or larger magnitude as those thathave occurred in the past could occur in the future. Largerfloods have been experienced in the past on streams with simi largeographical and physiographical characteristics as those foundin the study area. Simi lar combinations of rainfall and runoffwhich caused these floods could occur in the Sarasota County area.Therefore, to determine the flooding potential of the study area,was necessary to consider storms and floods that have occurredin regions of I ike topography, watershed cover and physical characteristics.Discussion of the future floods in this report isI imited to those that have been designated as the IntermediateRegional Flood and the Standard Project Flood. The StandardProject Flood represents a reasonable upper I imit of expectedflooding in the study area. The Intermediate Regional Floodmay reasonably be expected to occur more frequently although itwi I I not be as severe as the infrequent Standard Project Flood.INTERMEDIATE REGIONAL FLOODThe Intermediate Regional Flood is defined as one thatcould occur once in 100 years on the average, although it couldoccur in any year. The peak flow of this flood was developedfrom analysis of streamflow and precipitation records and runoffcharacteristics of streams in the general area. Peak flows thusdeveloped for the Intermediate Regional Flood at selected locationsin the study area are shown in table 2. The flood hydrographfor South Creek is shown on plate 10.17