strongly recommended since it contains a lot more on the basic understanding and the mechanics of hillslope stability. The analysis of debris flows and mudflows is quite complex partly because the nomenclature is poorly understood. The summary presented here is abbreviated from the book of Julien (2010). The emphasis is on the basic concepts alongside as many calculation examples as possible. Additional papers from O’Brien and Julien (1988) on rheology, O’Brien et al. (1993) on numerical modeling and Julien and Leon (2000) on countermeasures and remediation are added in Appendix. In terms of computer models, there is no “great” computer model that combines hillslope instability and debris flows altogether. Perhaps SINMAP should be considered for hillslope stability and the commercial code FLO-2D should be best for debris flow and mudflow routing. The recent TREX simulation results from Kim (2012) also provide a very instructive combined analysis of hillslope stability with hazard mapping and hydrological modeling with TREX. The illustration at Duksan Creek demonstrates the importance of rainfall intensity, surface runoff and shear stress in the delineation of damage areas from flashfloods and debris flows. The site illustrates the possible use of countermeasures in South Korea. Table of Contents
strongly recommended since it contains a lot more on the basic understanding and the mechanics of hillslope stability. The analysis of debris flows and mudflows is quite complex partly because the nomenclature is poorly understood. The summary presented here is abbreviated from the book of Julien (2010). The emphasis is on the basic concepts alongside as many calculation examples as possible. Additional papers from O’Brien and Julien (1988) on rheology, O’Brien et al. (1993) on numerical modeling and Julien and Leon (2000) on countermeasures and remediation are added in Appendix. In terms of computer models, there is no “great” computer model that combines hillslope instability and debris flows altogether. Perhaps SINMAP should be considered for hillslope stability and the commercial code FLO-2D should be best for debris flow and mudflow routing. The recent TREX simulation results from Kim (2012) also provide a very instructive combined analysis of hillslope stability with hazard mapping and hydrological modeling with TREX. The illustration at Duksan Creek demonstrates the importance of rainfall intensity, surface runoff and shear stress in the delineation of damage areas from flashfloods and debris flows. The site illustrates the possible use of countermeasures in South Korea. Table of Contents