Seiches in lough neagh

✍ Scribed by J. Darbyshire; Mollie Darbyshire

• Book ID: 104571970
• Publisher: John Wiley and Sons
• Year: 1957
• Tongue: English
• Weight: 515 KB
• Volume: 83
• Category: Article
• ISSN: 0035-9009
• DOI: 10.1002/qj.49708335508

✦ Synopsis

Abstract

Records of seiches in Lough Neagh during April 1949 were investigated. Fourier analysis of the records indicated three period bands centred round 1.6 hr, 1.15 hr, and 0.75 hr. The two longer periods appeared to have a nodal line across the centre of the lake, parallel to the shorter sides. Methods of deriving these periods in terms of the shape of the lake basin are discussed.

The amplitudes of the seiches were compared with the wind records and a high degree of correlation was obtained between the amplitude and __W__dθ/dt, where W is the wind speed and dθ/dt is the rate of change of wind direction.

An estimate was made of the coefficient of damping of the seiche amplitude and it was found to correspond to a decay to half value in 10 hr.