thumbnail

Flood profiles of the Alafia River, west-central Florida, computed by step-backwater method

Water-Resources Investigations Report 77-74
By:
https://doi.org/10.3133/wri7774

Links

Abstract

The Alafia River is a coastal stream that discharges into Hillsborough Bay. The river and its two principal tributaries, North Prong Alafia River and South Prong Alafia River, drain an area of 420 sq mi of predominantly rural land. However, near the coast, urban residential developments are increasing. The flood plain of the river is subject to flooding, particularly during large regional storms. Peak-discharge frequencies have been determined for data available at two gaging stations in the basin. The flood profiles for peak discharges of recurrence intervals of 2.33, 5, 10, 25, 50, 100, and 200 years have been determined using the step-backwater method. These profiles can be used in conjunction with topographic maps to delineate the area of flooding. Flood profiles were not determined for the tidally affected area near the mouth of the river. Flood marks were located that can be associated with the 1960 flood which occurred when Hurricane Donna passed over the area. (Woodard-USGS)

Suggested Citation

Robertson, A., 1977, Flood profiles of the Alafia River, west-central Florida, computed by step-backwater method: U.S. Geological Survey Water-Resources Investigations Report 77-74, Report: iv, 21 p.; 3 Plates: 30.82 x 15.46 inches or smaller, https://doi.org/10.3133/wri7774.

Study Area

Publication type Report
Publication Subtype USGS Numbered Series
Title Flood profiles of the Alafia River, west-central Florida, computed by step-backwater method
Series title Water-Resources Investigations Report
Series number 77-74
DOI 10.3133/wri7774
Year Published 1977
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Description Report: iv, 21 p.; 3 Plates: 30.82 x 15.46 inches or smaller
Country United States
State Florida
Other Geospatial Alafia River
Additional publication details