摘要
径流-风暴潮相互作用可增大河口区风暴潮增水,增加风暴潮灾害风险。基于SCHISM模式建立了珠江河口风暴潮数值模型,以台风“山竹”为例,采用实测资料对模型计算结果进行验证,最高潮位相对误差在9%以内。设计了台风“山竹”实测径流与5年一遇洪水的对比试验,讨论了径流变化对河口风暴潮增水的影响,结果表明:河口口门站位风暴潮增水随径流量的增大而增大。径流增加对泗盛围、南沙等站位的风暴潮影响较大,在风暴潮增水达到最大值时影响最为显著。以径流动力作用为主的区域,当上游径流量增大时,对风暴潮增水起到负影响作用:如磨刀门水道,随着径流的增加,沿河道上溯的风暴潮增水逐渐减小,由灯笼山站3.22 m减小至马口站1.12 m。以潮汐动力作用为主的区域,当上游径流量增大时,对风暴潮增水起到正影响作用:如珠江干流,随着径流的增加,沿河道上溯的风暴潮增水逐渐增大,大虎站的最大增水值为3.44 m,中大站为4.24m,从口门至后航道区域增大了0.8 m。
Runoff-storm surge interaction can increase storm surge,hence aggravating the risk of storm surge in the estuary area.In this paper,a numerical model of storm surges in the Pearl River Estuary was established based on the Semi-implicit Cross-scale Hydroscience Integrated System model.With typhoon Mangkhut as an example,observational data were used to verify model results,and the relative error of the highest tide was less than 9%.Two runoff processes were simulated and the effects of runoff changes on storm surge were discussed.The results showed that storm surge intensified with the increase in runoff volume.Runoff had a considerable influence on the storm surge at Sishengwei and Nansha stations,and the influence was the most significant when the storm surge water reached the maximum amount.In the runoff-dominated area,when the upstream runoff volume increased,a negative effect on storm surge water could be identified.For example,in the Modaomen waterway,storm surge decreased with the increase in runoff volume.It dropped from 3.22 m at Denglongshan Station to 1.12 m at Makou Station.In the tidedominated area,when the upstream runoff volume increased,a positive effect on storm surge water could be identified.For example,in the Pearl River,storm surge water increased with the growth of runoff volume.For example,it rose from 3.44 m at Dahu Station to 4.24 m at Zhongda Station.
作者
罗志发
谭超
黄本胜
邱静
黄广灵
LUO Zhifa;TAN Chao;HUANG Bensheng;QIU Jing;HUANG Gunagling(Guangdong Research Institute of Water Resources and Hydropower,Guangzhou 510635,China;Guangdong Key Laboratory of Hydrodynamic Research,Guangzhou 510635,China;State and Local Joint Engineering Laboratory of Estuarine Hydraulic Technology,Guangzhou 510635,China;Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds,Guangzhou 510006,China;Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai,Guangdong 519080,China)
出处
《热带气象学报》
CSCD
北大核心
2022年第4期521-528,共8页
Journal of Tropical Meteorology
基金
广东省重点领域研发计划项目(2019B111101002)
广东省水利科技创新项目(2022-01)
广东省软科学研究计划项目(2018B020207004)
粤港水安全保障联合实验室(2020B1212030005)共同资助
关键词
径流
风暴潮增水
珠江河口
台风“山竹”
runoff
storm surge water
Pearl River Estuary
typhoon Mangkhut
作者简介
通讯作者:谭超,男,湖南省人,博士,主要从事水力学及河流动力学研究。E-mail:gdsky_tanchao@foxmail.com
