变化环境下东江干流河源至博罗河道糙率分析
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摘要
东江水文情势自20世纪80年代以来发生了较大的变化。为研究变环境下的河道特性,基于K值分析方法延长了主要水文站水位-流量关系曲线(简称"H-Q"曲线)及用一维数学模型方法反推了不同流量级下的河道糙率数据。结果表明:河源、岭下流量站的高水位H-Q曲线变化不大。东江下游河床下切导致博罗水位流量曲线呈下降趋势。基于K值方法可以得到河源、岭下、博罗水文站相对合理的高流量H-Q曲线。河源至博罗段1999年河道糙率沿程取值0. 025～0. 038之间。部分位置如博罗-剑潭河段、上几角-下几角附近河道糙率较大(超过0. 03),这与床面坡降较大有关。
The hydrological characteristics of Dongjiang River have changed greatly since 1980 s. In order to study the characteristics of river channel under changing environment,the water level discharge curve of the main hydrological stations has been extended( referred to as" H-Q "curve) based on the K value analysis method,and the river roughness data at different flow rates are deduced using one dimensional mathematical model. The results showed that: The H-Q curve of Heyuan and ridge lower traffic stations changed little. The down-cutting of river bed at downstream of Dongjiang River lead to decrease of the H-Q curve at Boluo Station. Based on the historical K value,a relatively reasonable H-Q curve with high flow rate can be obtained. The roughness of Heyuan to Boluo section reaches 0. 025-0. 038. Some sections such as the Boluo-Jiantan section and the upper-lower corner have larger roughness( > 0. 03),which is related to the relatively large bed slope.
The hydrological characteristics of Dongjiang River have changed greatly since 1980 s. In order to study the characteristics of river channel under changing environment,the water level discharge curve of the main hydrological stations has been extended( referred to as" H-Q "curve) based on the K value analysis method,and the river roughness data at different flow rates are deduced using one dimensional mathematical model. The results showed that: The H-Q curve of Heyuan and ridge lower traffic stations changed little. The down-cutting of river bed at downstream of Dongjiang River lead to decrease of the H-Q curve at Boluo Station. Based on the historical K value,a relatively reasonable H-Q curve with high flow rate can be obtained. The roughness of Heyuan to Boluo section reaches 0. 025-0. 038. Some sections such as the Boluo-Jiantan section and the upper-lower corner have larger roughness( > 0. 03),which is related to the relatively large bed slope.
引文
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[3]谢平,唐亚松,陈广才,等.西北江三角洲水文泥沙序列变异分析———以马口站和三水站为例[J].泥沙研究,2010,35(2),26-31.
[4]谢平,陈广才,李德,等.水文变异综合诊断方法及其应用研究[J].水电能源科学,2005,23(2):11-14+89-90.
[5]倪培桐,闻平,刘剑宇.珠江三角洲水沙年际变化趋势分析[J].人民珠江,2016,37(1):19-24.
[6]沈五伟,陈一帆,申振东.河道糙率反问题研究回顾与展望[J].浙江水利科技,2017,45(4):1-3+7.
[7]拜亚茹,赵锦程,邱秀云,等.人工渠道糙率系数影响因素的试验研究[J].水资源与水工程学报,2014,25(4):229-232.
[8]方神光,张文明,张康,等.西江中游干支流河道糙率研究[J].泥沙研究,2016,41(2):20-25.
[9]雷燕,唐洪武,周宜林,等.遗传算法在河网糙率参数反演中的应用[J].水动力学研究与进展(A辑),2008,23(6):612-617.
[10]陈一帆,程海洋,万晓丽,等.结合糙率校正的河网水情数据同化[J].水科学进展,2015,26(5):731-738.
[11]董文军,姜亨余.一维水流方程中曼宁糙率的参数辨识[J].天津大学学报(自然科学与工程技术版),2001,34(2):201-204.
[12]吴晓玲,王船海.基于水动力学模型的实时糙率反推在洪水预报中的应用[J].水电能源科学,2008,26(5):43-45+82.
[13]吴光琼.群居蜘蛛优化算法在水文频率曲线参数优化的应用[J].水资源与水工程学报,2015,26(6):123-126+131.
[14]赵东,彭畅.受干支流回水影响的断面水位与流量关系研究[J].水资源与水工程学报,2015,26(3):175-177+183.
[15]倪培桐.东江干流及三角洲河段设计洪潮水面线计算报告[R].广东省水利水电科学研究所,2005.
[16]东江流域历史洪水调查[R].广东省水利厅,1982.
[17]熊贵枢,王兴.水位流量关系曲线的延长方法和对若干水力因素的讨论[J],人民黄河,1983(5):26-29.
[18]邱静.剑潭水利枢纽水工模型试验研究报告[R].广东省水利水电科学研究院,2003.