The invention relates to a physical
simulation test device and method for convergence of debris flows into rivers. A horizontal low end of a first
debris flow tributary ditch groove, a horizontal low end of a second
debris flow tributary ditch groove, a horizontal low end of a
debris flow main
ditch forming region groove and a horizontal high end of a debris flow main ditch circulation region groove are fixedly connected through movable rubber tapes, a
rainfall simulation device is also arranged, a variable-width river
main channel groove and a reservoir are arranged on a movable support device, a water outlet of the reservoir is connected with one end of the variable-width river
main channel groove, the other end of the variable-width river
main channel groove is connected with a triangular weir, and a horizontal high end of the debris flow main ditch circulation region groove is communicated with the side surface of the variable-width river main channel groove through a debris flow main ditch accumulation region groove. With the adoption of the physical
simulation test device and method, debris flow
outbreak and convergence processes can be simulated, effects of factors such as different
solid matter sources, slope angles,
river water flow velocities, debris flow accumulation regions, river channel intersection corners and the like on convergence (blockage) of debris flows into rivers can be studied, and the operation is convenient.