Shoaling Rates and Related Data from Knik Arm near Anchorage, Alaska.
Abstract
In high tidal range areas where large quantities of fine-grained sediment are carried in suspension, the potential for harbor shoaling is great. Because of high current speeds resulting from the tides, and because of winter ice conditions, many small-craft harbors in Alaska are constructed as enclosed basins connected to estuaries by a navigation channel. Such harbors, as typified by Dillingham Harbor where the shoaling rate is 6 feet per year, become sediment traps. The study measured summer shoaling rates in 1971 and 1972 in a sedimentation tank located on a tidal flat near Anchorage, Alaska. The mean shoaling rate was 0.073 foot per day in 1971, and 0.06 foot per day, or 15 percent less in 1972. Shoaling rates were uniform throughout the summer tests; the sediment surface in the 12-foot-diameter tank remained level.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1976
- Accession Number
- ADA027095
Entities
People
- Craig H. Everts
- Harlan E. Moore
Organizations
- Coastal Engineering Research Center