REPORT DOCUMENTATION PAGE 



Form Approved 

 OMB No. 0704-0188 



Public reporting burden for this collection of infomnation is estimalsd to average 1 hour per response, Indudng the time for reviewing instnjcUons, searching existing data sources, gathering and maintaining the 

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 vaTid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. 



1. REPORT DATE (DD-MM-YYYY) 

 September 2000 



2. REPORT TYPE 



Report 1 of a series 



3. DATES COVERED (Fmm - To) 



4. TTTLE AND SUBTITLE 



DMS: Diagnostic Modeling System 



Report 1 , Reduction of Sediment Shoaling by Relocation of the Gulf Intracoastal Waterway, 



Matagorda Bay, Texas 



5a. CONTRACT NUMBER 



5b. GRANT NUMBER 



5c. PROGRAM ELEMENT NUMBER 



6. AUTHOR(S) 



Nicholas C. Kraus, David J. Mark, Soraya Sairuff 



5d. PROJECT NUMBER 



5e. TASK NUMBER 



5f. WORK UNIT NUMBER 



7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) 



U.S. Army Engineer Research and Development Center 

 Coastal and Hydraulics Laboratory 

 3909 Halls Ferry Road 

 Vicksburg,MS 39180-6199 



8. PERFORMING ORGANIZATION REPORT 

 NUMBER 



Technical Report CHL-99-19 



9. SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES) 



U.S. Army Corps of Engineers 

 Washington, DC 20314-1000; 



U.S. Army Engineer District, Galveston 

 2000 Fort Point Road 

 Galveston, TX 77550 



10. SPONSOR/MONITOR'S ACRONYM(S) 



11. SPONSOR/MONITOR'S REPORT 

 NUMBER(S) 



12. DISTRIBUnON / AVAILABILHY STATEMENT 



Approved for pubUc release; distribution is unlimited. 



13. SUPPLEMENTARY NOTES 



14. ABSTRACT 



The Diagnostic Modeling System (DMS) is intended to provide a rapid, yet reliable capability for identifying and evaluating navigation 

 chaimel operations and maintenance (O&M) alternatives based on limited information about the hydrodynamic and sediment-transport 

 conditions at a site. The DMS gives a diagnosis of a problem shoaling area (in contrast to conducting expensive and time-consuming 

 smdies), together with guidance for determining possible solutions. The DMS also contains dredging and associated records to document 

 shoaling patterns and measures taken. As a first proof of concept, the methodology of the DMS was appUed to investigate a region of 

 increasing sediment shoaling along the Gulf Intracoastal Waterway (GIWW), Matagorda Bay, Texas. Morphological, engineering, and 

 numerical modeling approaches were taken in three parallel paths. The three study methods foimd that a bird island located near the 

 intersection of the GIWW and Matagorda Ship Chaimel (MSC) was experiencing significant erosion because of its close proximity to the 

 MSC entrance and strong flood currents. The DMS methodology led to the conclusion that the GIWW should be located several kilometers 

 north of its present location, which would also improve navigation efficiency at the MSC and GIWW intersection. 



15. SUBJECT TERMS 



Coastal inlet 



Diagnostic Modeling System 



Gulf intracoastal waterway 

 Matagorda ship channel 



Matagorda Bay 

 Pass CavaUo 



Texas 



16. SECURITY CLASSIRCATION OF: 



a. REPORT 



UNCLASSIFIED 



b. ABSTRACT 



c. THIS PAGE 



UNCLASSIFIED 



17. UMITATION 

 OF ABSTRACT 



18. NUMBER 

 OF PAGES 



62 



19a. NAME OF RESPONSIBLE PERSON 



19b. TELEPHONE NUMBER (include area 

 code) 



Standard Form 298 (Rev. 8-98) 



Prasciibad by ANSI Std. 239.18 



