冲积河流河床综合稳定性指标研究

根据河床演变理论，利用已有的基本公式，导出了冲积河流河床绝对稳定应满足的水沙床无量纲数（量）条件，由此建立了由水沙床因素构成的实用冲积河流稳定程度函数公式。基于该公式建立了冲积河流河床综合稳定性指标以及对应的河型判别准则，然后利用黄河下游11年资料和渭河部分资料进行了初步验证。计算表明，建立的冲积河流河床综合稳定性指标以及对应的河型判别准则是合理和有效的，可以利用该判别方法预测大型河流因水沙条件改变而导致的河型变化趋势。

Study on Integrated Stability Index of Alluvial River Channel

According to the theory of bed development and using the existing basic formulas,the paper educes the conditions of non-dimensional number(quantity) of sediment channel for absolutely stable which should be satisfied for alluvial river channel and establishes a practical formula of function of stability for an alluvial river composing of the factors of sediment channel based on that condition.It establishes integrated stability indexes of alluvial river channel and corresponding discrimination standard of river pattern based on the formula and conducts preliminary validation by utilizing 11-year data of the lower Yellow River and partial data of the Weihe River.The calculation shows that the established integrated stability indexes of alluvial river channel and corresponding discrimination standard of river pattern are reasonable and effective and can predict the variation trend of river pattern caused by the changes of silt-discharge condition by using this method.