Analytical study on long wave refraction over a dredge excavation pit

作者：Niu, Xiaojing; Yu, Xiping^*

来源：Wave Motion, 2011, 48(3): 259-267.

DOI：10.1016/j.wavemoti.2010.11.001

• Long wave
• Dredge excavation pit
• The mild-slope equation
• Analytical solution

An analytical solution of the mild-slope wave equation is derived to describe long wave propagating over the idealized dredge excavation pit. The pit is assumed to be axisymmetrical and composed of a flat bottom and a convex slope. The convex slope is expressed by a simple power function. The problem is solved in the polar coordination system by the separation of variables. By the obtained solution, the characteristics of the wave refraction and reflection over the dredge excavation pit are discussed. The results show that wave amplitude is attenuated within and in the lee side of the pit and amplified at the rear flank of the pit due to wave refraction. The effects of the incident wave length and the shape of the pit on wave refraction are also discussed.

• 出版日期2011-4
• 单位清华大学