Accession Number : AD0821832

Title :   FIELD OBSERVATIONS OF WAVE RUNUP ON A SAND BEACH.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Hoernemann, Michael John

Report Date : JUN 1967

Pagination or Media Count : 94

Abstract : Six sets of field measurements of runup resulting from both wind waves and swell were made on a uniform sand beach. Waves were recorded simultaneously directly offshore at a point outside the surf zone. Each individual runup was correlated with a specific wave, using a travel-time plot. Runup occurrences were always found to be fewer in number than wave occurrences, particularly when wind waves were present. Large variations in the runup resulting from waves of a given height were found to exist. These variations in height and ratio of runup to waves were caused in large part by the interaction of successive foam lines. Interaction occurred in the form of retardation by backwash of preceding waves, overtaking by a following foam line, and overriding by a small unbroken wave. It is concluded that the complicated nature of runup resulting from ordinary sea and swell makes it difficult to predict runup accurately from laboratory studies. (Author)

Descriptors :   (*OCEAN WAVES, FLUID DYNAMICS), (*BEACHES, SAND), THESES, CALIFORNIA, HARBORS, WIND, WATER WAVES, INTERACTIONS, COASTAL REGIONS, MEASUREMENT, FLUID FLOW, PERIODIC VARIATIONS, TIDES, PACIFIC OCEAN, TIME, SURFACE PROPERTIES, SIMULATION, MATHEMATICAL PREDICTION.

Subject Categories : Physical and Dynamic Oceanography
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE