典型年螺山站水位-流量关系变化及成因分析

陈致远; 梅翰林; 金光球; 郭超; 金中武

doi:10.11988/ckyyb.20240751

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长江科学院院报 ›› 2024, Vol. 41 ›› Issue (12) : 29-39. DOI: 10.11988/ckyyb.20240751

水资源

典型年螺山站水位-流量关系变化及成因分析

陈致远 ¹^,²^,³ ,
梅翰林 ³ ,
金光球 ¹^,² ,
郭超 ³ ,
金中武 ³

作者信息 +

Variation Trend and Causes of Stage-Discharge Relationship at Luoshan Station in Typical Years

CHEN Zhi-yuan ¹^,²^,³ ,
MEI Han-lin ³ ,
JIN Guang-qiu ¹^,² ,
GUO Chao ³ ,
JIN Zhong-wu ³

Author information +

文章历史 +

摘要

螺山站是长江干流与洞庭湖出流的汇口水文站,水位-流量关系复杂,是长江中游防洪重要的依据站之一。为进一步探究冲刷条件下螺山站水位-流量关系的演变趋势和影响因素,基于1990—2021年实测水位、流量数据和部分年份河道断面数据,采用M-K检验法、Theil-Sen Median方法和水位-流量关系综合校正法,分析冲刷条件下螺山站的水位-流量关系变化趋势和影响因素。结果表明: ①螺山站年际枯水和中水流量级的水位呈较显著下降趋势,与枯水和基本河槽的形心下降幅度基本一致;而洪水流量级的水位波动范围较大,但没有显著的上升趋势。②三峡水库的运行使得螺山站和汉口站的水位差波动范围缩小,平均水位差总体增大,但在2013年后的汛期水位差缩小,可能导致汛期对螺山站顶托加剧。③螺山站在2016年和2020年的洪水连续过程中受顶托、涨落率和其他因素影响的贡献率均值分别为34.76%、23.82%、41.42%和31.38%、50.62%、18.00%,表明顶托和涨落率是影响水位的主要影响因素,但其他因素的影响率在部分年份可能偏大。

Abstract

Luoshan hydrological station serves as a crucial flood control base in the middle reaches of the Yangtze River as it is located at the confluence of mainstream Yangtze River and the outflow of Dongting Lake with complex stage-discharge relationship. We analyzed the trends and influencing factors of stage-discharge relationship at Luoshan Station under erosion conditions by employing the M-K test method, Theil-Sen Median method, and a comprehensive correction approach for stage-discharge relationship based on measured water level and discharge data from 1990 to 2021 and typical river section data for selected years. Our key findings are as follows: 1) The water levels at Luoshan Station for low and medium discharges significantly decreased, which was consistent with the decline of the centroid elevation of low water-level channel and basic channel. Conversely, the water level at flood discharges exhibited large fluctuation range, yet with a non-significant upward trend. 2) The operation of the Three Gorges Reservoir has narrowed the fluctuation range of water level differences between Luoshan Station and Hankou Station, leading to an overall increase in the average water level difference. However, after 2013, the water level difference within flood flow intervals reduced, potentially exacerbating topwater conditions at Luoshan station during the flood season. During continuous flooding events in 2016 and 2020, contributions from topwater elevation, fluctuation rate, and other influencing factors at Luoshan Station averaged 34.8%, 23.8%, 41.4% and 31.4%, 50.6%, and 18.0% respectively; indicating that topwater elevation and fluctuation rate are primary influencing factors on water levels while other contributing factors may have larger proportions in certain years.

导出引用

陈致远, 梅翰林, 金光球, 等. 典型年螺山站水位-流量关系变化及成因分析[J]. 长江科学院院报. 2024, 41(12): 29-39 https://doi.org/10.11988/ckyyb.20240751

CHEN Zhi-yuan, MEI Han-lin, JIN Guang-qiu, et al. Variation Trend and Causes of Stage-Discharge Relationship at Luoshan Station in Typical Years[J]. Journal of Yangtze River Scientific Research Institute. 2024, 41(12): 29-39 https://doi.org/10.11988/ckyyb.20240751

中图分类号： TV147

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