摘要
以拟建的沐官岛海湾水库为研究对象,从内假潮促使底边界层咸水与表层淡水混合的角度探讨海湾水库突然混合的临界风速。利用Shintani改进的有效韦德伯恩数,结合沐官岛水库地形及分层位置,计算沐官岛水库突然混合的临界风速。风向为NNW时,水体表面最大吹程为3103. 45 m,湖面之上10 m处风速大于20. 5 m/s时,沐官岛水库水体突然混合,同样条件下长方体水库突然混合的临界风速为21.7 m/s;风向为SW时,水体表面最大吹程为3 620. 69 m,水体突然混合的临界风速为22. 7 m/s,同样条件下长方体水库临界风速为19. 6 m/s;风向为SW(由海吹向陆岸)时,虽然沐官岛水库水体表面最大吹程大于风向为NNW(由陆岸吹向海)时的最大吹程,库水却更难发生突然混合,并且在这两个不同的风向下,该水库临界风速与长方体水库临界风速的大小关系相反。
Taking Muguandao Reservoir, a proposed bay reservoir, as the research object, the critical wind speed of sudden mixing in the bay reservoir was discussed from the point of view that the internal falsehood caused the mixing of salt water in the bottom boundary layer and fresh water in the surface layer. The critical wind speed of sudden mixing of Muguandao reservoir was calculated by using Shintani＇s improved effective Wadbum number, combined with the topography and stratified position of Muguandao Reservoir. When the wind direction is NNW, the maximum blowing distance is 3 103.45 m on the water surface, and the wind speed is more than 20.5 m/s at 10 m above the lake surface, the water of Muguandao Reservoir suddenly mixes. Under the same conditions, the critical wind speed of sudden mixing in the cuboid reservoir is 21.7 m/s. When the wind direction is SW, the maximum blowing distance is 3 620.69 m on the water surface, the critical wind speed of sudden mixing in the reservoir is 22.7 m/s. Under the same conditions, the critical wind speed of sudden mixing in the cuboid reservoir is 19.6 m/s. When the wind direction is SW （from sea to land） , the sudden mixing in reservoir is more difficult, although the maximum surface blow distance of Muguandao Reservoir is larger than that of NNW （from land to sea）. And in these two different wind directions, the critical wind speed of the reservoir is opposite to the critical wind speed of the cuboid reservoir.
作者
秦志新
高增文
李静
李红
QIN Zhixin;GAO Zengwen;LI Jing;LI Hong(College of Environmental Science and Engineering,Qingdao University,Qingdao 266071,China)
出处
《水资源保护》
CAS
CSCD
北大核心
2018年第6期76-81,87,共7页
Water Resources Protection
基金
国家自然科学基金(51279075)
山东省自然科学基金(ZR2009EQ001)
关键词
海湾水库
临界风速
突然混合
内假潮
地形
分层
韦德伯恩数
bay reservoir
critical wind speed
sudden mixing
internal falsehood
topography
layered
Wedderbum number
