Elevation Changes due to Tides, Long Beach, CA

by Dale S. Kunitomi, Petroleum Engrg. Assoc., Dept. of Oil Properties, City of Long Beach, CA,

Serial Information: Journal of the Surveying and Mapping Division, 1972, Vol. 98, Issue 2, Pg. 137-143

Document Type: Journal Paper


Daily changes in elevation due to compaction and expansion of the upper 400 ft to 700 ft (122m-214m) of the earth have been recorded. It is suggested that changes in intergranular pressure due to the daily tidal cycle apply and relax elastic stress to sand grains resulting in surface elevation changes ranging from 0.002 ft to 0.010 ft (0.6 mm - 3.0 mm). Variations in rates of water withdrawal from nearby water wells on drilling Island Chaffee substantially increase elevation changes at that location.

Subject Headings: Tides | Beaches | Soil pressure | Compacted soils | Elastic analysis | Soil stress | Sandy soils | Wells (water) | California | United States

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