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Title: Bore hole studies of the naturally impounded fill at Santa Barbara, California
Authors: United States. Army. Office of the Chief of Engineers
University of California, Berkeley
Trask, Parker D. (Parker Davies), 1899-1961
Scott, Theodore
Keywords: Sedimentation and deposition
Shore protection
Core sampling
Core samples
Publisher: United States, Beach Erosion Board
Engineer Research and Development Center (U.S.)
Series/Report no.: Technical memorandum (United States. Beach Erosion Board) ; no. 49.
Description: Technical Memorandum
From the Introduction: A breakwater was built at Santa Barbara about 25 years ago to provide protection for sea-going vessels and pleasure-yachts. This breakwater was dog-legged in outline, one leg extended seaward for a distance of 1400 feet from the former shore line, the other leg a like distance parallel to the shore. Within a few years the alongshore drift of sand from west to east had filled the area west of the breakwater and sand had begun to move along the side of the breakwater and accumulate within the harbor, forming a sand island as shown in Fig. 1. As 800 to 1000 oubic yards of sand a day normally flow along the beach in this area, in a few years 60 much sand had accumulated within the harbor that it became necessary to remove the sand by dredging. Since that time the sand fill within the harbor has been removed by dredging every two or three years. The sand is placed east of the pier, shown on Fig. 1, to replenish the beaches to the east which were cut off from their normal supply of sand by the breakwater. The periodic removal of the sand and the inconvenience of the sand fill in the harbor present a serious economic problem to the neighboring community. The Beach Erosion Board; as a consequence, has been studying the mechanics of the accumulation of sand adjacent to the breakwater for a number of years in order to find the most economical means of coping with the problem. The Waves Research Laboratory of the Department of Engineering of the University of California at Berkeley, in recent years has been cooperating with the Beach Erosion Board in this work. In connection with these studies it seamed desirable to drill a series of holes through the fill that had accumulated west of the breakwater. As this fill overlay areas that formerly were covered by sea water, drill holes would penetrate not only sand that had accumulated above water as the area was filled up, but also would penetrate sands resting upon the sea bottom before the breakwater was built. Thus information as to how sand accumulates, both offshore and on the beach would be obtained The present paper presents results of this drilling program. A series of seven bore-holes were drilled in the filled area. The location of these bore-holes with respect to man-made improvements and bottom contours is shown in Figs. 1 and 2. An additional bore-hole would have been desirable near the knee of the dog-legged breakwater where the water originally was more than twenty feet deep, but buildings interfered with moving the drilling rig across the sand to that position.
Rights: Approved for Public Release, Distribution is Unlimited
Appears in Collections:Technical Memorandum

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