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The AAPG/Datapages Combined Publications Database

AAPG Bulletin

Abstract


Volume: 58 (1974)

Issue: 10. (October)

First Page: 2210

Last Page: 2211

Title: Previous HitWaveNext Hit Characteristics with Restricted Fetch: Case Study of Lake Okeechobee: ABSTRACT

Author(s): R. S. Murrall

Article Type: Meeting abstract

Abstract:

In the design of earth work constructions along rivers and lakes, it is important to know the relations between wind and the waves. Such observations are a first stage in a complete investigation of Previous HitwaveNext Hit effects on beaches and earth structures of different shapes and materials. The generally used form of these relations deals with deepwater conditions, where the fetch is unlimited. Such relations cannot be applied to small lakes and protected bays.

The earliest work in this field was that of Johnson on Clear Lake, California. He concluded that wind duration but not fetch was the controlling factor in any kind of change in Previous HitwaveNext Hit characteristics. Later, on the basis of the study of Abbots Lagoon, California, Johnson showed that the dimensionless term gf/u2 is useful in estimating Previous HitwaveNext Hit conditions within certain limits. Burling compared the Previous HitwaveNext Hit data from Staines reservoir with the data

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of Johnson, Bretschneider, and Sverdrup and Munk. Whereas the curves are of the same form, there is a great amount of discrepancy. Burling's line is 15-25 percent below the other lines. Data from Lake Okeechobee, Florida, indicate that there is a transitional region between deep water and shallow water, where the Previous HitwaveNext Hit height is affected by combinations of wavelength and depth of water.

The data from Lake Okeechobee align closely with Burling's results. However, Burling's observations were from a reservoir where the maximum fetch was about one km. In Okeechobee the fetch ranges up to 60 km. The Okeechobee study reveals that the proper method to define shallow-water waves should include fetch and wind velocities as well as the depth of water. The Previous HitwaveTop heights are lower than expected for lower wind velocities and higher than expected for higher wind velocities in shallow water, with limited fetch.

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