ABSTRACT
J. K. Wang et al. put forward the ‘‘V’’ shaped cross-section drainage canal which is made for the transportation of solid matter in debris flow and compared the hydraulic conditions among the ‘‘V’’ shaped, circle shaped, trapezoid shaped and rectangle shaped cross-section drainage canal when the overflowing areas are the same. This chapter analyzes the ‘‘Trapezoid-V’’ shaped drainage canal’s hydraulic condition and discussed its optimum cross-section design. The shape of elementary cross-section Generally, the trapezoid and the rectangle crosssection drainage canal applicable for all types and scale of debris flow, while the ‘‘V’’ shaped drainage canal applicable for frequent and small viscosity debris flow. The debris flow drainage canal of traditional crosssection is often blocked, filled up and inefficient when draining debris flow.
