汛期连续洪水情形下长江下游ZQ关系曲线分析

doi:10.3969/j.issn.1674-0696.2018.01.10

重庆交通大学学报（自然科学版） ›› 2018, Vol. 37 ›› Issue (1): 62-65.DOI: 10.3969/j.issn.1674-0696.2018.01.10

• 港口航道·水利水电·资源环境 • 上一篇下一篇

汛期连续洪水情形下长江下游ZQ关系曲线分析

杨清伟，廖翔，包文君，彭慧灵

(重庆交通大学河海学院，重庆 400074)

收稿日期:2016-12-02 修回日期:2017-03-25 出版日期:2018-01-15 发布日期:2018-01-15
作者简介:杨清伟(1972—)，男，重庆人，教授，博士，博士生导师，主要从事水土资源利用与生态安全研究。E-mail:qwyang2001@163.com。通信作者：廖翔(1994—)，男，四川成都人，硕士研究生，主要从事水土资源利用与生态安全研究。E-mail:13101221128@163.com。
基金资助:
国家自然科学基金项目(40871222)；交通运输部科技项目(2013329814230)；重庆市基础与前沿研究计划重点项目 (cstc2015jcyBX0041;cstc2009BA7029)

Z-Q Relationship Curve Analysis for the Lower Reaches of the Yangtze River in the Case of Continuous Flood in Flood Season

YANG Qingwei, LIAO Xiang, BAO Wenjun, PENG Huiling

(School of River & Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, P. R. China)

Received:2016-12-02 Revised:2017-03-25 Online:2018-01-15 Published:2018-01-15

摘要/Abstract

摘要： 定床状态下，一次洪水的水位-流量关系(Z-Q关系)曲线通常呈逆时针绳套型，而对汛期自然河道连续洪水情形下Z-Q之间的绳套曲线型态尚不清楚。基于长江下游大通水文站2016年6—8月汛期水位流量实测资料，采用最小二乘法对其Z-Q关系进行了拟合研究。结果表明：该期长江下游汛期洪水类型为流域性洪水；小洪水绳套曲线可呈顺时针-逆时针交替型，大洪水则总体呈顺时针型。此外，小洪水的洪水特征值出现的顺序为最大流量、最高水位，大洪水则相反。分析认为，该洪水期河道河槽和岸坡冲刷严重，需考虑采取相应措施提高岸坡稳定性。

关键词: 水利工程, 长江下游, 连续洪水, Z-Q关系, 绳套曲线, 最小二乘法

Abstract: Generally, for one mono flood, the water level-flow relationship (Z-Q) curve normally presents a shape of counterclockwise loop. However, the Z-Q curve is unknown when continuous flood occurrs. Based on the measured data of the water level and flow from Datong Hydrological Station of the lower Yangtze River in June to August in 2016, and applying the Least Squares Method, the curve relationship between Z and Q was studied in the present research. The results show that, in 2016, the flooding of the lower Yangtze River can be qualitatively classified as classical basin flood. The counterclockwise-clockwise-alternating loop curve is found for a general flood, while single clockwise loop curve is found for the catastrophic flood. Additionally, the order of characteristic value for the general flood is the maximum flow, the maximum water level; and an inverse order, namely, the maximum water level-the maximum flow for the catastrophic flood. The above analysis indicates that: during the flooding period from June to August in 2016, the serious channel and bank erosion occur; some necessary measures should be conducted to improve the stability of the bank and slope.

Key words: hydraulic engineering, the lower reaches of the Yangtze River, continuous flood, Z-Q relationship, loop curve, the least squares method

中图分类号:

K903
P952

杨清伟，廖翔，包文君，彭慧灵. 汛期连续洪水情形下长江下游ZQ关系曲线分析[J]. 重庆交通大学学报（自然科学版）, 2018, 37(1): 62-65.

YANG Qingwei, LIAO Xiang, BAO Wenjun, PENG Huiling. Z-Q Relationship Curve Analysis for the Lower Reaches of the Yangtze River in the Case of Continuous Flood in Flood Season[J]. Journal of Chongqing Jiaotong University(Natural Science), 2018, 37(1): 62-65.

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汛期连续洪水情形下长江下游ZQ关系曲线分析

Z-Q Relationship Curve Analysis for the Lower Reaches of the Yangtze River in the Case of Continuous Flood in Flood Season

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