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- W1665839810 abstract "The catchment-stream model is fitted to three natural catchments by suitable choice of the parameters vo (rainfall intensity scale, an initial, arbitrary, choice), ts (catchment equilibrium time), λ (ratio of stream equilibrium time to ts and Qs (scale of the discharge hydrograph). Although the geometry of natural catchments is far more complicated than that of the model, the agreement between computed and actual discharge hydrographs is quite good. The optimum value of λ is usually about 0.5. Although Qs should be equal, by definition, to the product of vo by the catchment area, it is usually found to be somewhat less. When stream rating curves are available, the scale of stream stage, Hs, can be estimated. The model parameters L (catchment length), D (stream length) and α and A (parameters which combine slope and roughness effects for catchment and stream respectively) can then be found. Thus stage measurements are of particular importance. Infiltration is assumed to take place over the catchment sheet-flow areas mainly while rain is falling. Thereafter infiltration continues in streambeds, decreasing with time as the smaller ephemeral streams become dry. Some discharge hydrographs also appear to contain contributions from interflow. It is concluded that the theoretical model could be improved if a better geometrical description of the stream network could be found. At present the model incorporates many of the smaller streams in the “catchment phase”, and a concentrating effect, which can modify the rising front of the discharge hydrograph, is not included." @default.
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- W1665839810 date "1966-01-01" @default.
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- W1665839810 title "A hydraulic model for the catchment-stream problem" @default.
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- W1665839810 doi "https://doi.org/10.1016/0022-1694(66)90065-5" @default.
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