泥石流的阻力分析

观测资料表明,泥石流阻力要大于同等水力条件下的清水阻力。根据泥右流中粗、细颗粒对阻力的不同影响,认为泥石流阻力的增大主要是由于泥石流中的推移质造成的。为了证实这一观点,作者分析了推移质附加阻力与泥石流阻力中大于清水阻力的那部分阻力之间的关系。分析结果表明,泥石流阻力和清水阻力之差有明显地随推移质附加阻力的增加而增大的趋势。

An analysis to the resistance of debris flow

The observed data shows that the resistance of debris flow is higherthan that of water under the same hydraulic condition. According to theanalysis on different effects of coarse grains and fine grains for resistan-ce. This paper thinks that the reason causing increase of resistance ofdebris flow is the bed load in debris flow.In order to prove this idea, wehave analysed the relation between extra resistance causing bed load andincrement of resistance of debris flow. The result shows that the incre-ment of resistance increace with the extra resistance increasing.