丹江口水库至王甫洲河段冲淤变化对水位影响
Water Level Variation Due to River Scour from Danjiangkou to Wangfuzhou Section

DOI: 10.12677/JWRR.2020.95052, PP. 493-502

Keywords: 洪水位，河床冲刷，汉江，中高洪水，水面线
Flood Level, River-Bed Scour, Hanjiang River, The High Flood, Water Surface Level

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Abstract:

本文结合王家营水位站、黄家港水文站、老河口水位站实测水位流量资料，对不同量级洪水河道糙率进行率定，采取率定的河道糙率、1967年以来实测水文断面以及实测中高洪峰进行河道稳定流一维计算。结果表明，河道中高水条件下水位与河道冲刷影响密切相关，随着河道的冲刷，当遭遇1964年同大洪水等中高洪水时，河道洪水位呈现降低趋势，现状河道断面下水位较1964年实际水位平均降幅达1.6 m；随着河道冲刷趋于稳定，洪水位的降幅逐步减小，从运行初期的平均降幅0.61 m降低至近年的0.19 m，洪水位随着河道冲淤平衡趋于稳定。
In order to understand the influence of river scouring on river water level from Danjiangkou to Wangfuzhou section, the variation rule of river water level under medium and high water condition is clarified. Based on the measured water level and flow data of Wangjiaying, Huangjiagang and Laohekou water level stations, the watercourse roughness of different magnitudes of flood are calibrated and used to calculate the one-dimensional steady flow since 1967. The results show that the river level under the condition of medium and high water is closely related to the river scour. With the river scour, the river flood level presents a decreasing trend when the river is confronted with the same flood in 1964 and other medium and high floods, and the average lower water level of the current river section is 1.6 m lower than the actual water level in 1964. With the stabilization of channel scour, the decrease of flood level gradually decreases, from the average decrease of 0.61 m in the initial stage of operation to 0.19 m in recent years. The flood level tends to be stable with the balance of river scour and silt.

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