波生流对海岸污染物输移的影响
The effects of wave-induced currents on the transport of pollutant outside and inside surf zone
-
摘要: 通过物理模型实验对海岸波浪作用下污染物运动特性进行了分析,重点分析了质量输移流、沿岸流、沿岸流不稳定运动及破波带内旋涡运动等海岸水动力因素的影响.实验中坡度分别取为1:100和1:40,实验中采用CCD摄像机记录墨水的运动轨迹,同步测量流体质点速度以及波面升高.实验表明,在破碎带外污染物主要受波浪非线性引起的质量输移流的影响;在破碎带内主要受沿岸流的影响,同时还受沿岸流不稳定运动及大尺度旋涡运动的影响.Abstract: The effects of longshore currents,Stokes mass transport by waves,large scale eddies and the instability of longshore currents on the transport of pollutant in a surfzone are discussed based on the experimental results.The physical experiments were conducted on the two plane beaches with the slope 1:100 and 1:40.The movements of pollutant(ink for the experiment) being injected into the water through point sources are recorded by a CCD camera,the fluid particle velocities and wave surface elevations were measured simultaneously.The experiment shows that the transport of pollutant is driven by Stokes mass transport outside the surfzone and by the longshore currents inside the surfzone,it also is affected strongly by the large-scale eddies and the instability of longshore currents.
-
Key words:
- pollutant transport /
- surfzone /
- long shore currents /
- breaking waves
-
SVENDSEN I A,HANSEN J B.Cross-shore currents in surf-zone modeling[J].Coastal Engineering,1988,12(8):23-42. 邹志利.水波理论及其应用[J].北京:科学出版社,2005. GALVIN C J,EAGLESON P S.Experimental study of longshore currents on a plane beach[J].Technical Memorandum[C].U S Army Coastal Engineering Research Center.1965.10. VISSER P J.Laboratory measurements of uniform to longshore currents[J].Coastal Engineering,1991,15(6):563-593. ZOU Zhi-li,WANG Shu-ping,QIU Da-hong,et al.Longshore currents of random waves on different plane beaches[J].China Ocean Engineering,2003,17(2):265-276. ZOU Zhi-li,WANG Shu-ping,QIU Da-hong,et al.Longshore current of regular waves on different beaches[J].Acta Oceanologica Sinica,2003,22(1):123-132. RENIERS A J H M,BATTJES J A,FALQUES A,et al.A laboratory study on the shear instability of longshore currents[J].Journal of Geophysical Research,1997,102(C4):8 597-8 609. BOWEN A J,HOLMAN R A.Shear instabilities of the mean longshore current[J].Journal of Geophysical Research,1989,94(C12):18 023-18 030. PEREGRINE D H.Vorticity and eddies in the surf zone[J].Coastal Dynamics'95[C].Gdansk,Poland.1995.460-464. PEREGRINE D H.Vorticity and eddies in the surf zone[J].Theoretical and Computational Fluid Dynamics,1998,10:295-309. 孙涛,陶建华.波浪作用下渤海湾近岸海域污染物的输移扩散规律[J].海洋与湖沼,2004,35(2):110-119. 唐军,邹志利,沈永明,等.近岸海域波浪场中污染物运动的实验研究[J].海洋学报,2004,26(1):105-112. 唐军,邹志利,沈永明,等.海岸带波浪破碎区污染物运动的实验研究[J].水科学进展,2003,14(5):542-547. 李炜.环境水力学进展[J].武汉:武汉水利电力大学出版社,1999.
点击查看大图
计量
- 文章访问数: 715
- HTML全文浏览量: 10
- PDF下载量: 1108
- 被引次数: 0