UNCLASSIFIED 



SECURITY CLASSIFICATION OF THIS PAGE (When Data Entered) 



REPORT DOCUMENTATION PAGE 



READ INSTRUCTIONS 

 BEFORE COMPLETING FORM 



I. REPORT NUMBER 



CETA 81-6 



2. GOVT ACCESSION NO 



3. RECIPIENT'S CATALOG NUMBER 



. TITLE (and Subtitle) 



A METHOD TO FORECAST SEDIMENTATION RATES 

 RESULTING FROM THE SETTLEMENT OF SUSPENDED 

 SOLIDS WITHIN SEMIENCLOSED HARBORS 



5. TYPE OF REPORT a PERIOD COVERED 



Coastal Engineering 

 Technical Aid 



6. PERFORMING ORG. REPORT NUMBER 



7. AUTHORfsJ 



Craig H. Everts 



8. CONTRACT OR GRANT NUMBER(s) 



PERFORMING ORGANIZATION NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center (CEREN-GE) 



Kingman Building, Fort Belvoir, Virginia 22060 



D31235 



11. CONTROLLING OFFICE NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center 



Kingman Building, Fort Belvoir, Virginia 22060 



12. REPORT DATE 



June 1981 



13. NUMBER OF PAGES 

 19 



14. MONITORING AGENCY NAME a ADDRESSf// dilterent from Controlling Ottice) 



15. SECURITY CLASS, (ol this report) 



UNCLASSIFIED 



16. DISTRIBUTION STATEMENT (ol this Report) 



Approved for public release; distribution unlimited. 



17. DISTRIBUTION STATEMENT (ol the abstract entered In Block 20, II dlllerent from Report) 



18. SUPPLEMENTARY NOTES 



19. KEY WORDS (Co 



aary and Identify by block , 



nberj 



Alaska 

 Currents 



Dillingham Harbor 

 Mathematical model 



Sedimentation 

 Semienclosed harors 

 Suspended sediment 

 Tides 



20. ABSTRACT (Contlnu 



averse side If necessary and Identify by block i 



nber) 



When a semienclosed harbor is planned for an area where sediments may enter the harbor 

 in suspension, it is desirable to forecast the rate at which those sediments will be 

 deposited. A method to make such a forecast is presented in this report. The harbor 

 shoaling rate (sediment accretion) is the dependent variable. The method is applicable to 

 situations where the harbor is almost totally enclosed; bedload transport is negligible; 

 deposition is nearly uniform throughout the harbor; sediment will not be resuspended (once 

 deposited); and tide or river stage rise causes currents which move water and suspended 

 sediment Into the harbor. 



EDITION OF t NOV 65 IS OBSOLETE 



UNCLASSIFIED 



SECURITY CLASSIFICATION OF THIS PAGE (When Data Entered) 



