Proposal for prevention strategies against the enlarged turbidity currents

这项研究提出了控制浑浊流的实用方法和在全球变暖导致的严重灾害中保护人类财产的策略。由于全球变暖，强降水往往集中在一些当地山区。我们利用一个小斜槽进行了实验，并对这种增大的浊流进行了基于Navier-Stokes方程有限体积解的计算。结果表明，电流与障碍物的相互作用通过将具有较大质量和能量的强大水头分成上下两部分，从而一定程度上降低了从电流的后半部分向水头提供能量的速率。结果表明，即使是远离底部的水平扁平结构体系，在不对环境造成任何负担的情况下，也有相当大的抑制破坏性冲击力的效果。

This study proposes the practical methods of controlling the turbidity currents and the strategies to protect human properties in the serious disasters which have been more frequently brought about by heavy precipitation extraordinarily concentrated in some local mountainous areas due to global warming. We carried out the experiments using a small inclined tank and the computations based on the finite volume solution of the Navier-Stokes equations for such enlarged turbidity currents. The results indicate that the interaction of the currents with the obstacles certainly reduces the rate of energy supply to the head from the latter part of the current by dividing the powerful head with a large amount of the mass and energy into the upper and lower parts. It is found that as a result even the system of horizontal flat structures away from the bottom has considerable effects to depress the destructive impact force without any burden on the environment.