水利科技与经济
水利科技與經濟
수리과기여경제
2014年
10期
36-39
,共4页
海岸底床形态%沙坝%LITPROF%波浪入射角%底床坡度
海岸底床形態%沙壩%LITPROF%波浪入射角%底床坡度
해안저상형태%사패%LITPROF%파랑입사각%저상파도
on shore′s morphology evolution%sand bar%LITPROF%incidence′s angle of wave%beach slope gradient
近岸水下沙坝的位置与高度是河口海岸底床变化的主要原因，波浪与地形之间的耦合与反馈造成了沙坝向海连续迁移。使用LITPACK的添加模块LITPROF模拟沙质海岸剖面形态变化主要是沙坝的形成与迁移，通过模拟不同波浪入射角及剖面坡度对沙坝形成与迁移的影响，得出沙坝主要在波浪破碎点处形成，波浪入射角增大，沙坝离岸迁移越快；底床坡度越陡，沙坝产生与迁移越快，岸滩变形也越大。
近岸水下沙壩的位置與高度是河口海岸底床變化的主要原因，波浪與地形之間的耦閤與反饋造成瞭沙壩嚮海連續遷移。使用LITPACK的添加模塊LITPROF模擬沙質海岸剖麵形態變化主要是沙壩的形成與遷移，通過模擬不同波浪入射角及剖麵坡度對沙壩形成與遷移的影響，得齣沙壩主要在波浪破碎點處形成，波浪入射角增大，沙壩離岸遷移越快；底床坡度越陡，沙壩產生與遷移越快，岸灘變形也越大。
근안수하사패적위치여고도시하구해안저상변화적주요원인，파랑여지형지간적우합여반궤조성료사패향해련속천이。사용LITPACK적첨가모괴LITPROF모의사질해안부면형태변화주요시사패적형성여천이，통과모의불동파랑입사각급부면파도대사패형성여천이적영향，득출사패주요재파랑파쇄점처형성，파랑입사각증대，사패리안천이월쾌；저상파도월두，사패산생여천이월쾌，안탄변형야월대。
The sandbar′location and height is the main reason that estuarine and coastal seabed′s cross-shore profile changes.The interaction between waves and onshore′s bed sediment made the bar constantly migrate to the offshore.This paper use LITPACK′s adding module-LITPROF to simu-late the sandy shore′s morphology changes , mainly the sandbar′s formation and migration.With the time-series wave , the sandbar appeared and we found that the formation of the bar is associated with breaking wave point.It is always located after the breaker points and close to the ocean.By changing the wave incident angle or the slope of the profile , it showed that the greater wave incident Angle , the er the bar offshore migration the larger the incidence′s angle of the wave , the faster sand bar move to offshore;the steeper the beach slope gradient , the faster the Shaba generates and move , as well as shore beach′deformation.
