长江中游城陵矶—武汉河段稳定航深计算方法改进
Improvement of the Calculation Method for Stable Navigation Depth of Chenglingji-Wuhan Section in the Middle Reach of Yangtze River
单敏尔 1刘鑫 2李瀛 1张伟 1陈怡君 1雷雪婷1
作者信息
- 1. 长江航道规划设计研究院,武汉 430040
- 2. 长江航道勘察设计院(武汉)有限公司,武汉 430040
- 折叠
摘要
航道稳定航深计算是充分利用航道水深资源的前提条件,改进稳定航深的计算过程对估算航道水深潜力有重要的意义.为计算长江中游城陵矶—武汉河段航道最大稳定水深,改进了稳定航深估算法中的河相关系参数、水深修正系数及分流比计算过程,同时综合考虑分汊河段和非分汊河段的稳定航深,最后确定了城陵矶—武汉河段在不同流量、不同河宽下的稳定航深.研究结果表明:①通过构建城陵矶—武汉河段流量Q与河相系数α、形状系数k、河相指数p、河宽B的经验关系,可简化改进稳定航深估算法的稳定航深计算过程.②城陵矶—武汉河段在98％设计通航保证率流量下,150、200、250 m航宽尺度下基于自然禀赋的稳定航深分别为5.98、5.64、5.30 m;在20 000 m3/s流量下,150、200、250 m航宽尺度下的稳定航深分别为12.56、11.89、11.22 m;在30 000 m3/s流量下,150、200、250 m航宽尺度下的稳定航深分别为16.81、16.16、15.49 m.
Abstract
Estimating the maximum stable navigation depth of waterway is a prerequisite for optimizing the utilization of water depth resource.Enhancing the process of calculation holds significant importance in evaluating waterway depth potential.To ascertain the maximum stable waterway depth of Chenglingji-Wuhan section of the middle reach of Yangtze River,we refined the processes of calculating river phase relationship parameter,waterway depth correc-tion coefficient,and split ratio in the estimation method.In consideration of both branching and non-branching river sections,we determined the maximum stable waterway depth of Chenglingji-Wuhan section under various flow rates and river widths.Key findings include:1)The process of calculating stable waterway depth can be simplified and improved by establishing the empirical relations of flow rate Q against river phase coefficient α,shape coefficient k,river phase indexβ,and river width B.2)At a design navigation guarantee rate of 98％,the stable waterway depths of Chenglingji-Wuhan section based on natural endowments are 5.98,5.64,and 5.30 meters for navigation widths of 150,200,and 250 meters,respectively.At a flow rate of 20 000 m3/s,the stable waterway depths with the same navigation widths are 12.56,11.89,and 11.22 meters,while for a flow rate of 30 000 m3/s,these values are 16.81,16.16,and 15.49 meters.
关键词
稳定航深/改进计算/河相关系/水深修正系数/分汊河段/长江中游Key words
stable navigation depth/improved calculations/river phase relationship/water depth correction coeffi-cient/branching river section/middle reach of Yangtze River引用本文复制引用
基金项目
长江航道局科研项目(2022230001)
长江航道规划设计研究院自主立项科研项目(2022-L-02)
出版年
2024
国家科技期刊平台
NSTL
万方数据