摘要
引海水冲刷黄河河口段河槽是解决黄河下游泥沙淤积的一种新思路。为确定引用海水的流量大小和冲刷的时机及历时 ,经长水槽概化动床模型试验 ,分别得出了注入点下游沿程冲刷过程、平衡比降以及注入点上游溯源冲刷的过程和平衡比降。得出了计算两种平衡比降的经验公式 ,并用中国水科院试验的成果进行了验证。这些成果补充了黄河大流量低含沙量条件下的河道平衡比降计算方法 ,为引海水冲刷方案的确定提供了依据。
A new method has been proposed to reduce the progressive river channel aggradation in the lower Yellow River by sluicing the distributaries using pumped seawater. This paper presents the results of an experimental study based on this novel idea, which involves a series of flume tests in a 64 meter long mobile bed flume, to figure out the discharge, timing and duration of seawater sluicing on the basis of observed processes of progressive erosion downstream of the point of seawater input, and the retro-progressive erosion upstream of it. The equilibrium channel bottom slopes for both cases have been found out based on test data, and an empirical relationship is developed to predict such slopes for various sluicing conditions, which has been validated using independent data from other researchers. Results of this study can be used to finalize the sluicing scheme.
出处
《泥沙研究》
CSCD
北大核心
2003年第1期64-69,共6页
Journal of Sediment Research
关键词
黄河河口
引海水冲沙
沿程冲刷
溯源冲刷
平衡比降
河道
Yellow River estuary
diverting seawater
scouring
progressive erosion
retrogressive erosion
equilibrium channel bottom slope
