Basic characteristics of the rainstorm-producting mud-rock flow in Beijing area
北京泥石流暴雨基本特征

In this paper, temporal- spatial distribution of the rainstorm- producting mud- rock flow is analysed.It is pointed out that mud-rock flow rainstorm happens mainly in the situation of longitudinal circulation in North China. In the mud-rock flow area, local atmosphere is evidently latent instable, and the rainfall intensity is greater than mm/hour. The rainstorm area is located in the overlapping area of the mesoscale moist statical energe front zone, frontgenesis and strong moisture covergence on the surface.