英罗湾潮汐水道演变及其稳定性分析

The Evolution and Stability of the Tidal Channel of Yingluo Bay

根据北部湾溺谷型海湾——英罗湾附近海区的海图及新近实测地形图、卫星遥感图及其潮汐水道的动力场,分析英罗湾及其附近海区的海底地形的演变及其原因,着重于其潮汐水道的地貌演变及动力过程,并计算分析了其稳定性。研究结果表明,英罗湾潮汐水道近几十年的演变以海床冲刷、深槽发育、浅滩萎缩为主,其原因包括人类活动、河流来沙量减少等因素。英罗湾潮汐水道演变规律研究表明其潮汐水道的落潮主水道表现出有规律的演变,口门稳定性比较高。

Based on the nearby sea charts and recently measured topographic maps,remote sensing maps and hydrodynamic survey data,the evolution of the seabed topography and its causes in the tidal channel of the drowned valley type Yingluo Bay are analyzed,and the evolution and hydrodynamics of the tidal channal are emphasized. The stability situation is calculated. The results show that the Yingluo Bay tidal channel in recent decades is characterized by scour,deep groove and shoal development atrophy. The reasons include human activities,decrease of sediment and other factors. Research on the evolution of the tidal channel shows that the main channel in Yingluo Bay,the ebb tidal channel showed regular evolution,gate stability is relatively high.