Accession Number : AD0862058

Title :   Sand Ridge Migration Apalachicola River, Florida.

Descriptive Note : Informal rept.,

Corporate Author : NAVAL OCEANOGRAPHIC OFFICE NSTL STATION MS

Personal Author(s) : Tittle, Robert

Report Date : 02 JUL 1969

Pagination or Media Count : 27

Abstract : The migration rate of subaqueous sand ridges was measured in two reaches of the Apalachicola River, Florida, from 25 June to 31 July 1968. At Site One, 9 miles above the river's mouth, ridge movement was irregular and inconclusive because current velocities were near the critical value for short-term measurement of migration and because of the proximity of the cruise tracks to the turbulent zone near shore. At Site Two, 12 1/2 miles above the river's mouth, ridge movement was more regular and active. Historical records indicate these ridges have formed within the past year as a result of a decrease in river discharge. At both sites, measured ridge heights ranged from one foot to four feet with wavelengths of 30 to 150 feet. Migration rates of individual ridges ranged from 0 to 4.5 ft/day. (Author)

Descriptors :   (*BEACHES, EROSION), (*SAND, MOTION), SITE SELECTION, RIVER CURRENTS, TIDES, FLOODS, SEDIMENTATION, TRANSPORT PROPERTIES, VELOCITY, DEPTH INDICATORS, FLORIDA.

Subject Categories : Hydrology, Limnology and Potamology

Distribution Statement : APPROVED FOR PUBLIC RELEASE