Development of 'Debris Library' and 'GSSHA' linkage-architecture for non-Newtonian sediment fluid flow

Assumption of Newtonian fluid flow condition, linear stress-strain relationship, fails for sediment laden fluids with volumetric concentrations more than 30%. As sediment concentrations increase, they begin to affect the fluid properties, which alter the stress-strain relationship. Debris flows depart from linear stress-strain assumptions, with no intercept, embedded in the clear water flow equations. The 'Debris Library' assigns a stress-strain relationship under non Newtonian sediment laden fluid flow condition. The Gridded Surface Subsurface Hydrologic Analysis (GSSHA) model is a fully coupled overland/in-stream sediment transport model. This study developed a linkage-architecture to pass the GSSHA computed flow velocity, depth and concentration to Debris Library and to pass the Debris Library computed internal shear stresses back to GSSHA.