Improvement of the Calculation Method for Stable Navigation Depth of Chenglingji-Wuhan Section in the Middle Reach of Yangtze River

SHAN Min-er; LIU Xin; LI Ying; ZHANG Wei; CHEN Yi-jun; LEI Xue-ting

doi:10.11988/ckyyb.20230106

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Journal of Changjiang River Scientific Research Institute ›› 2024, Vol. 41 ›› Issue (6) : 91-97. DOI: 10.11988/ckyyb.20230106

Hydraulics

Improvement of the Calculation Method for Stable Navigation Depth of Chenglingji-Wuhan Section in the Middle Reach of Yangtze River

SHAN Min-er¹, LIU Xin², LI Ying¹, ZHANG Wei¹, CHEN Yi-jun¹, LEI Xue-ting¹

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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 correction 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 index β, 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.

Key words

stable navigation depth / improved calculations / river phase relationship / water depth correction coefficient / branching river section / middle reach of Yangtze River

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SHAN Min-er, LIU Xin, LI Ying, ZHANG Wei, CHEN Yi-jun, LEI Xue-ting. Improvement of the Calculation Method for Stable Navigation Depth of Chenglingji-Wuhan Section in the Middle Reach of Yangtze River[J]. Journal of Changjiang River Scientific Research Institute. 2024, 41(6): 91-97 https://doi.org/10.11988/ckyyb.20230106

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