Limitation of the transport capacity approach in sediment transport modeling

摘要: In a recent paper by Polyakov and Nearing (2003) it was shown experimentally that the sediment transport capacity in rill is not unique for given soil type, slope, flow rate. Indeed, they found dependent on whether occurring under net erosion or deposition conditions. They concluded this nonuniqueness discrepancy needs addressing models. Here we postulate behavior occurs as result of defining an model input to distinguish between regimes, instead determining outcome separate but continuous rate processes entrainment such case multisize class Hairsine Rose (1992a, 1992b). This used reinterpret reproduce results (2003). The analysis shows cannot be composed range size classes uniqueness only exceptional single soil. Consequently, when input, concept deficient modeling real soils across different