珠江河口潮流流量变化控制指标初探  

Tide Flow Control Indicator for the Pearl River Estuary

作　　者：何用 刘霞 王华 

机构地区：[1]珠江水利委员会珠江水利科学研究院,广州510611 [2]珠江水利委员会水利部珠江河口动力学及伴生过程调控重点实验室,广州510611

出　　处：《长江科学院院报》2016年第5期1-5,共5页Journal of Changjiang River Scientific Research Institute

基　　金：水利部公益性行业科研专项(201301073)

摘　　要：随着珠江河口地区滩涂岸线资源开发和涉水工程建设,河口边界形态及动力环境产生了巨大的变化;动力环境变化必然引起河口河床形态的调整,对潮汐河口稳定产生深远的影响。以珠江河口潮汐通道稳定性分析为基础,探讨潮汐河口的河相关系,初步提出了河口潮流变化控制指标。研究建立了珠江河口口门断面面积与多年平均落潮流量之间的关系,并建立了近期口门均衡断面的河相关系;在此基础上,预测了河口潮流变化引起的口门河床冲淤变化。根据河床冲淤变化与口门行洪能力调整的关系,提出了河口口门落潮流量变化控制指标为1%~2%,研究成果为河口涉水工程管理提供了定量指标参考。Along with the exploitation of tidal flat and beach resources and the construction of water estuary region of the Pearl River, the estuarine boundary shape and dynamic environment changed projects in the greatly, which inevitably gave rise to the adjustment of estuarine riverbed morphology, exerting far-reaching influence on the stabil- ity of tidal estuaries. On the basis of stability analysis for the tide channel of Pearl River estuary, the hydraulic-geo- metric relation and the tide control indicator were put forward. Moreover, the relationship between entrance section area and average ebb flow for many years of the Pearl River estuary was established. The balanced section＇ s hy- draulic-geometric relation was also established. On this basis, scouring and silting at the entrance caused by estuar- ine tide changes was forecasted. According to the relationship between riverbed sediment adjustment and flood dis- charge capacity change, we concluded that the ebb flow change at the entrance of the estuary should be controlled in 1%-2%. The research result provides quantitative reference for the management of water projects at the estuary.

关 键 词：珠江河口 潮汐通道 口门稳定性 河相关系 潮流流量控制指标 

分 类 号：TV148[水利工程—水力学及河流动力学]