受回水变动与洪水涨落综合影响的水位流量关系研究

Study on Stage Discharge Relationship Affected by the Comprehensive Influence of Backwater and Flood

水位流量是水文研究中的重要资料,通过水位流量关系由水位进行流量推算是一重要途径。大多数研究针对的是稳定流或受单一变量如回水变动或洪水涨落的影响的水位流量关系,本文分别对回水与洪水两种因素的水位流量关系进行深入分析,对存在洪水涨落,回水变动综合影响的水位流量关系进行探讨,提出一种对存在两种变动因素的水位流量关系求解的新途径(综合校正法),更加符合河流实际情况。分别采用单纯受洪水涨落的推流法、落差指数法与综合校正法对寸滩、万县水文站的水位流量验证比较,综合校正法的结果更加合理、准确,能够有效提高流量整编的精度,具有推广价值。

Stage and discharge are important data in hydrological research.It is an important way to obtain hydrological data to calculate stage and discharge through the stage-discharge relationship,and most studies are directed at the stage-discharge relationship in steady flow or flow with a single variable such as backwater change or flood fluctuation.Based on the in-depth analy⁃sis of the stage-discharge relationship between backwater and flood,and the stage-discharge relationship with the comprehensive influence of both flood fluctuation and backwater variation is discussed.A new way to solve the relationship between stage and discharge with two variable factors is proposed(the comprehensive correction method),which is more in line with the actual situation of the river.The stage and discharge data of Cuntan and Wanxian hydrological station are verified and compared by the flow reckoning method affected by flood fluctuations,the fall index method and the comprehensive correction method in this paper separately,and the results show that the comprehensive correction method is more reasonable and accurate,which can effectively improve the accuracy of flow reorganization,and has the promotion value.