Form Approved
REPORT DOCUMENTATION PAGE
OMB No. 0704-0188
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2. REPORT TYPE
1. REPORT DATE (DD-MM-YYYY)
3. DATES COVERED (From - To)
Final report
September 2001
4. TITLE AND SUBTITLE
5a. CONTRACT NUMBER
Tidal Inlet Equilibrium Area Experiments, Inlet Laboratory Investigations
5b. GRANT NUMBER
5c. PROGRAM ELEMENT NUMBER
6. AUTHOR(S)
5d. PROJECT NUMBER
William C. Seabergh, David B. King, Jr., Bettye E. Stephens
5e. TASK NUMBER
5f. WORK UNIT NUMBER
WU 32935
7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)
8. PERFORMING ORGANIZATION REPORT
NUMBER
U.S. Army Engineer Research and Development Center
ERDC/CHL TR-01-20
3909 Halls Ferry Road, Vicksburg, MS 39180-6199
10. SPONSOR/MONITOR'S ACRONYM(S)
9. SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES)
U.S. Army Corps of Engineers
Washington, DC 20314-1000
11. SPONSOR/MONITOR'S REPORT
NUMBER(S)
12. DISTRIBUTION / AVAILABILITY STATEMENT
Approved for public release; distribution is unlimited.
13. SUPPLEMENTARY NOTES
14. ABSTRACT
This study was designed to examine the relationship among channel area, tidal period, tidal prism, and maximum channel velocity.
Movable-bed model experiments were run to define an equilibrium area for different tidal periods and sediments. The magnitude of the
areas measured provided additional data for the relationship of the tidal prism versus minimum channel area in a size range slightly
larger than previous laboratory data in the continuum to very large field inlets. These data may help define the tidal prism-minimum
channel cross-sectional area relationship in the midrange channel size.
The study determined that physical model simulations in the idealized inlet model facility, other laboratory data, and field data
support a relationship, initially derived analytically, between an inlet equilibrium area Ac, maximum inlet velocity Um, tidal period T,
πP
and tidal prism P as Ac =
T Um
(Continued)
Movable-bed model
15. SUBJECT TERMS
Inlet equilibrium cross-sectional area
Tidal inlet
Inlet physical model
19a. NAME OF RESPONSIBLE
16. SECURITY CLASSIFICATION OF:
17. LIMITATION
18. NUMBER
PERSON
OF ABSTRACT
OF PAGES
a. REPORT
b. ABSTRACT
c. THIS PAGE
19b. TELEPHONE NUMBER (include
area code)
80
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Standard Form 298 (Rev. 8-98)
Prescribed by ANSI Std. 239.18