S.L.Kivva, M.J.Zheleznyak Two-dimensional modelling of surface runoff and sediment transport on small catchments |
Applied hydromechanics, Vol. 4 (76) ¹ 1, (2002) |
| A physically based mathematical model of a runoff formation in small catchments is developed. The processes of interception, depression storage, infiltration, overland flow, soil particle detachment, their transport and deposition are considered in the model. The numerical simulation of runoff formation requires the solution of the unsteady, two-dimensional shallow water equations, an equation for the infiltration process and the sediment transport equation. The shallow water equations and the sediment transport equation are integrated numerically using conservative implicit difference schemes of the first order of approximation. The difference scheme for the shallow water equations allows simulating of a open flow with the free boundary. Verification of the model has been based on observed data for rain-induced sediment yield events at catchments of the Buteni river. |
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KEY WORDS: *** |
| TEXT LANGUAGE: Russian |