三峡工程运行后长江中下游河道设计频率水文年泥沙模拟研究

李振青; 吴昌洪; 李会云; 杜晓阳

doi:10.3969/j.issn.1001-5485.2015.02.003

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raybet体育在线院报 ›› 2015, Vol. 32 ›› Issue (2) : 11-13,19. DOI: 10.3969/j.issn.1001-5485.2015.02.003

江湖泥沙与治理

三峡工程运行后长江中下游河道设计频率水文年泥沙模拟研究

李振青^a,吴昌洪^a,李会云^a,杜晓阳^b

作者信息 +

Study on the Simulation of Sediment in Hydrological Year of Designed Frequency in the Middle-Lower Reaches of Yangtze River after the Three Gorges Project Operation

LI Zhen-qing¹,WU Chang-hong¹,LI Hui-yun¹,DU Xiao-yang²

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文章历史 +

摘要

三峡水库运行以来,长江水沙发生很大的变化,为今后泥沙模型计算与试验水文条件的仿真性提供保证和依据,统计分析了三峡水库建库以来长江中下游泥沙的变化情况,并针对泥沙模型计算与试验中常选取的频率水文年的泥沙问题,做了详细的分析与研究。提出了泥沙模型中设计频率水文年所要模拟的沙质泥沙部分的处理方法与途径,即床沙质的输沙率过程采用流量输沙率关系推求设计洪水对应的沙量过程。并出于工程安全的考虑,采用流量输沙率关系的下包线作为沙量过程确定的依据。该方法较好地反映了三峡水库蓄水后泥沙量减少条件下的频率水文年泥沙模拟实际情况。

Abstract

The water flow and sediment in Yangtze River have changed remarkably since the operation of Three Gorges Reservoir. To provide guarantee and basis for the simulation of hydrological conditions in sediment model calculation, we statistically analysed the variation of sediment in the middle-lower Yangtze River since the Three Gorges Reservoir impoundment. On this basis, we carried out detailed research on the sediment problem of hydrological year of designed frequency which is often selected in sediment model calculations and tests. We proposed the method and approach of dealing with sandy sediment in sediment model which is to deduce the sediment process of designed flood according to the relationship between flow rate and sediment transport rate. Moreover, in consideration of project safety, we proposed to take the lower enveloping curve of flow rate versus sediment transport rate as the basis of determining sediment process. Through this method, the sediment condition in hydrological year of designed frequency when sediment load decreases could be well reflected.

导出引用

李振青,吴昌洪,李会云,杜晓阳. 三峡工程运行后长江中下游河道设计频率水文年泥沙模拟研究[J]. raybet体育在线院报. 2015, 32(2): 11-13,19 https://doi.org/10.3969/j.issn.1001-5485.2015.02.003

LI Zhen-qing,WU Chang-hong,LI Hui-yun,DU Xiao-yang. Study on the Simulation of Sediment in Hydrological Year of Designed Frequency in the Middle-Lower Reaches of Yangtze River after the Three Gorges Project Operation[J]. Journal of Changjiang River Scientific Research Institute. 2015, 32(2): 11-13,19 https://doi.org/10.3969/j.issn.1001-5485.2015.02.003

中图分类号： TV147

参考文献

[1] 董耀华,惠晓晓,蔺秋生.长江干流河道水沙特性与变化趋势初步分分析.raybet体育在线院报,2008,25(2):16-20.(DONG Yao-hua, HUI Xiao-xiao, LIN Qiu-sheng. Preliminary Analysis on Characteristics and Changing Tendency of Annual Runoff and Sediment Load in Changjiang River Main Channel . Journal of Yangtze River Scientific Research Institute, 2008, 25(2):16-20. (in Chinese))
[2] 胡向阳,张细兵,黄悦.三峡工程蓄水后长江中下游来水来沙变化规律研究.raybet体育在线院报, 2010, 27(6): 4-9.(HU Xiang-yang, ZHANG Xi-bing, HUANG Yue. Research on Changes of Coming Sediment and Coming Water of Middle-Lower Yangtze River after TGP Early Operation . Journal of Yangtze River Scientific Research Institute, 2010, 27(6): 4-9. (in Chinese))
[3] 王光谦.河流泥沙研究进展.泥沙研究,2007, (2):64-81.(WANG Guang-qian. Advances in River Sediment Research. Journal of Sediment Research, 2007, (2):64-81.(in Chinese))
[4] COLBY B R. Practical Computation of Bed-Material Discharge. Journal of the Hydraulics Division, ASCE,1964, 90(2): 217-246.
[5] 黄才安,赵晓冬.床沙质与冲泻质划分的新方法.扬州大学学报(自然科学版),2003,6(1):61-65. (HUANG Cai-an, ZHAO Xiao-dong. New Approach to Differentiating Wash Load and Bed Material Load. Journal of Yangzhou University (Natural Science Edition), 2003, 6(1) :61-65.(in Chinese))
[6] 李振青,廖小勇.南京市纬三路长江隧道工程河工模型试验研究报告.武汉:raybet体育在线 ,2011. (LI Zhen-qing, LIAO Xiao-yong. Report on the River Model of Tunnel Crossing the Yangtze River at Weisan Road in Nanjing City. Wuhan: Yangtze River Scientific Research Institute, 2011. (in Chinese))