ITNrT.AqqTFTFP 



SECURITY CLASSIFICATION OF THIS PAGE (TfTion Dais Entered) 



REPORT DOCUMENTATION PAGE 



READ INSTRUCTIONS 

 BEFORE COMPLETING FORM 



1. REPORT NUMBER 



TR 82-4 



2. GOVT ACCESSION NO. 



3. RECIPIENT'S CATALOG NUMBER 



4. TITLE (end Subtitle) 



PERFORMANCE OF A SAND TRAP STRUCTURE AND EFFECTS 

 OF IMPOUNDED SEDIMENTS, CHANNEL ISLANDS HARBOR, 

 CALIFORNIA 



TYPE OF REPORT & PERIOD COVERED 



Technical Report 



PERFORMING ORG. REPORT NUMBER 



7. AUTHORfs; 



R.D. Hobson 



8. CONTRACT OR GRANT NUMBERfs; 



9. PERFORMING ORGANIZATION NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center (CEREN-GE) 



Fort Belvoir, Virginia 22060 



C31235 



CONTROLLING OFFICE NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center 



Kingman Building, Fort Belvoir, Virginia 22060 



. REPORT DATE 



October 1982 



. NUMBER OF PAGES 



38 



14. MONITORING AGENCY NAME a ADDRESSf// d/HBren( Irom Controlling Office) 



. SECURITY CLASS, (of this report) 



UNCLASSIFIED 



16. DISTRIBUTION ST ATEMENT fo/ (/i/a ReporfJ 



Approved for public release; distribution unlimited, 



17. DISTRIBUTION STATEMENT (of the abatract • 



ed in Block 20, if different from Report) 



18. SUPPLEMENTARY NOTES 



19. KEY WORDS (Continue 



ssary and identify by block number) 



Channel Islands, California 

 Grain-size distribution 



Impounded sediments 

 Sand trap 



20, ABSTRACT CCaatiaue ant rvvers* aiife If n*<^»aeaiy and identity by block number) 



Monitoring of one complete filling cycle of' a sand trap located at Channel 

 Islands Harbor, California, has yielded textural and bathymetric data that 



(1) document patterns of infilling and sediment texture of the trapped sand, 



(2) compare coring versus surface grab sampling for describing native beach 

 and fill sediment textures, and (3) determine the textural properties of 

 trapped sediments and evaluate their performance as beach fill. This study 

 was conducted at the conclusion of the Coastal Engineering Research Center's 



(continued) 



1473 



EDrnON OF t NOV 65 IS OBSOLETE 



UNCLASSIFIED 



SECURITY CLASSIFICATION OF THIS PAGE (When Data Entered) 



