摘要
通过理论分析和公式推导,得到了黄河下游河道水位涨率随河宽及比降变化的一般规律,并根据曼宁公式推导得到了水位涨幅公式,利用该公式计算得到了消除比降影响后山东段河道流量为3 000～8 000 m3/s时的水位涨率。结果表明:消除比降影响后,山东段河道的水位涨率比原比降的减小了0.5 m左右,但仍比河南段的大,说明影响水位涨率的主要因素是主槽宽度。
By the theoretical analysis and the formula derivation, the general law between the rise rate of water level and channel width and gradient in the lower Yellow River was attained. On the other hand, the equation calculating the increment of＇water level could be derived according to the Manning expression. Then the increase of water level from 3 000 m^3/s to 8 000 m^3/s in Shandong reach was recalculated by eliminating the influences of channel gradient. The results show that the revised increment of water level is about 0.5 m lower than that of the original values, but it is also grea-ter than that in Henan reach. It indicates that the channel width plays a more important role than the channel gradient in the increase of water level.
出处
《人民黄河》
CAS
北大核心
2013年第3期13-15,共3页
Yellow River
基金
水利部公益性行业科研专项(200901020
2007SHZ1-3)
关键词
主槽宽度
河道比降
水位涨率
黄河下游
channel width
channel gradient
rise rate of water level
lower Yellow River
