摘要
为了提高沿海地区岛屿防御洪潮灾害的能力,需要对岛屿的排洪河渠进行整治,提出了推算岛屿河渠水面线的思路和方法。根据明渠恒定非均匀渐变流方程,从河渠两端出口分别向中间分流节点推算水面线。实例计算表明,排洪渠水面线呈两边低、中间略高的趋势,水位满足地面填筑要求;该计算方法可行,能够为岛屿型两边分流河渠水面线的计算提供参考。
In order to improve ability of preventing flood tide hazard in coastal areas, regulation of island channels is needed. Therefore, we propose the thoughts and methods for calculating water surface profile of island channel. According to the steady non - uniform flow equation for an open channel, we calculate the water surface profile from two outlets to the flow diversion node in the middle of the channel. The results show that calculated water surface profile is lower at the two ends and slightly higher at the middle and the water level can meet the surface filling requirement. The method is feasible and can provide reference for similar calculation of island channels in which the flows are diverted to the two ends.
出处
《人民长江》
北大核心
2010年第11期44-46,共3页
Yangtze River
关键词
洪潮
水面线
计算分析
岛屿河渠
flood tide
water surface profile
calculation analysis
island channels
