Methodological Research On Numerical Simulation And Disaster Risk Assessment Of Debris Flow Deposition Fan

This thesis focuses its research on the advanced areas of numerical simulation and disaster risk assessment of debris flow deposition fan. On the bases of its research achievements, a systematic methodology has been established for the assessment of disaster risk of debris flow deposition fan.With respect to numerical simulation of debris flow deposition fan, the previous studies has been reviewed in this thesis. When the author sets up the mathematics model with describing the process of two-dimensional debris flow, he develops the continuity equation by the law of conservation of mass and establishes the momentum equations by the law of conservation of momentum . The author makes full use of the advanced computer technologies, establishes the finite difference equation of numerical simulation by the differential operator fission method, and writes programs for computers which contact friendly with the other programs. The parameters are directly input on the keyboard. The numerical simulation process is correct and stable. The whole programs can be used commonly and be expanded easily. Comparing with the results of the laboratory experiment and the data observed in the field, the results of numerical simulation are identical. The deposition process by numerical simulation is in...