at a law that relates them. Of primary importance is the relationship 

 between wave characteristics and rate of sand flow. The principal 

 efforts ware made in this direction „ 



Other problems which should be considered are; Where do today's 

 flow rates stand? Are there other causes of sand movement besides wave 

 action? Is sand sorting by size or minerals of any significance either 

 in the fill or on the feeder beaches? 



Examination of Prior Data - In order to get the necessary back- 

 ground for the layout of details of this program, a great deal of ax—, 

 isting data were obtained from the sponsor and studied by University 

 engineers b Past surveys were of great help in selecting stations for 

 repeat surveys and study. House Document 761 was used as a handbook 

 because of its valuable summaries of statistical data. 



Three specific uses were made of these past data, (a) Times of 

 important changes (both accretion and erosion) were selected with a 

 view to having wave hind casts made which would be comparable with 

 University-obtained sand flow data. No hindsaster was available and 

 this part of the work has been postponed for the future* (b) Rate of 

 sand flow past a series of survey points was plotted graphically in 

 two ways in an effort to ascertain the validity of the theory of sand 

 waves. This theory proposes that periods of storm move large quantities 

 of sand from the feeder beach j this sand travels as a unit for. some 

 distance along the beach until brought to rest by a period of light 

 seas| another stormy period moves it along again. Eventually, of 

 course, the sand unit, or sand wave, is spread too thin to be re- 

 cognized. This motivating storm series might be the winter season, in 

 which case the period of the sand wave would be one year. A limited 

 examination indicates that this may be true and a wave length of 

 6000 feet may exist. Further study is required on this phenomena 

 before definite conclusions can be made, (c) The data on harbor 

 accretion has been reduced to graphic form, mostly to get a basis for 

 comparison of the new data. 



Surveys - Three types of location were deemed necessary to obtain 

 an adequate picture of the sand changes in the Santa Barbara area. 



a. A beach outside the "problem area" 1 of accretion or erosion 

 which responds only to seasonal changes. This was used to determine ■ 

 whether changes in the area under study are temporary (offshore-onshore) 

 or permanent (along-shore). The location selected for this was at 

 Arroyo Burro -{Hendry's Beach). In addition to the characteristic noted 

 above it is the mouth of an important drainage area and if any apprecia- 

 ble sediment had been brought down by a heavy runoff, the delta formed 

 would have been surveyed. Two ranges on lest Beach (which is believed 

 to be stable ) are expected to show the same seasonal change. 



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