水资源保护2024，Vol.40Issue(5)：53-61,9.DOI:10.3880/j.issn.1004-6933.2024.05.007
洪潮影响下潭江流域安全行洪阈值研究
Research on safety threshold of flood discharge in the Tanjiang River Basin under impact of floods and tides
摘要
Abstract
To study the dynamics of flood propagation and discharge capacity in the downstream tidal river section of the Tanjiang River Basin under flood and tide overlapping conditions,a one-dimensional hydrodynamic model was constructed to quantify the safety threshold of flow discharge at key control node of the Tanjiang River Basin and flood discharge capacity during tidal cycles under various tidal levels,control water levels,and discharge durations,and reveal the hydrological patterns of the Tanjiang River Basin under combined influences of floods and tides through simulation and calculation in multiple scenarios.Then,a high-precision safe flood discharge threshold map was obtained by using the the random frest model.The results indicate that in the downstream tidal river section of the Tanjiang River Basin dominated by tidal dynamics,the water level in the main channel is primarily affected by downstream tidal level,with the flood-tide backwater effect being more pronounced in high tides,and the safe threshold of flood discharge is affected by both tidal level and discharge duration.The flood discharge capacity in ebb tide period is significantly higher than that in flood tide period,and the flood discharge capacity in ebb tide period generally exhibits a linear variation with the water level of control section.关键词
感潮河段/洪潮叠加/行洪阈值/阈值图谱/潭江流域Key words
tidal river section/overlapping of floods and tides/flood discharge threshold/threshold map/Tanjiang River Basin分类
建筑与水利引用本文复制引用
周举,陈黎明,胡腾飞,陆昊,施勇,韦诚..洪潮影响下潭江流域安全行洪阈值研究[J].水资源保护,2024,40(5):53-61,9.基金项目
国家重点研发计划项目(2021YFC3200304) （2021YFC3200304）
广东省水利科技创新项目(2021-08) （2021-08）
中央级公益性科研院所基本科研业务费专项资金资助项目(Y523001) （Y523001）
江苏省卓越博士后计划项目(312260) （312260）
