b. The harbor fill area. inside the breakwater is the most 

 critical area. Here the rate of accretion can be calculated readily. 

 The outline and profile of the fill at the start of the surveys is 

 known and complete outlines and profiles were made at each regular 

 hydro graphic survey. To establish a rate-of-fill, regular checks 



of the principal fill area were made at shorter intervals. These 

 checks consisted of simple measurements made from fixed poles in the 

 fill to the edge of the breakoff (which is very abrupt and makes a de- 

 finite point). Slope of fill (angle of repose) remains constant and 

 accretion was determined. 



c. The erosion areas at Palm Park extending eastward to the 

 anticipated limits of the principal erosion of the two-year cycle 

 (between dredgings). This comprises the bulk of the surveys since 

 the easterly limit is not known. 



Iffjgg- Regordegs - pressure type wave recorders were installed at 

 Santa Barbara s Elwood, and Pt. Arguello. The Santa Barbara unit was 

 installed in 30 feet of water off the west end of the breakwater, with 

 the recording unit being located in the harbormaster's office. As a 

 means of checking wave characteristics and to generally assume con- 

 tinuity of the wave record, a Beach Erosion Board step-resistance 

 gage and a tferk IX underwater pressure unit were installed on the 

 Signal Oil and Gas Company pier at Elwood. Unexplained corrosion 

 of the contact points of the step-resistance gage prevented this gage 

 from yielding records ; hence, it was removed from the pier. 



The Elwood-Santa 3arbara wave meters record highly refracted waves 

 just before they break on the channel shore. To get at more basic 

 wave information, it was decided to re-activate the Pt. Arguello re- 

 cording station so that unrefracted ocean waves could be compared both 

 with the channel waves and the deep-sea conditions as estimated by fore- 

 casts. 



Wind Recorders - A "Dynes w type wind velocity and direction recorder 

 was installed at the harbormaster's office at the start of the study. 

 This instrument is basically a recording pitot tube — weather vane 

 arrangement. Its purpose is to keep track of influence due to winds 

 which might act to lower or reinforce arriving waves or generate currents, 

 and to allow appraisal of sand movements due to wind. In the event that 

 channel storms appear to be an important factor in the sand movement, 

 this would be a great aid in hindcasting local wave conditions due to 

 winds not shown on small scale meteorological maps. This instrument has 

 worked satisfactorily from the beginning and the winds appear to follow 

 a regular pattern with storm conditions rarely arising. 



Summary •=■ A summary of the work accomplished in the Santa Barbara 

 study is presented in the report Issue 8, Series 14 (see Part VI). 

 As indicated in this report most of the effort to date has been directed 

 toward installing equipment, instituting a program of measurement, and 

 obtaining data. Additional data should be obtained, however, in order 



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