Analytical study on sediment carrying capacity formula by Western scholars
The calculation of sediment carrying capacity represents a pivotal aspect in the solution of theoretical and practical river-related issues.Western scholars have been engaged in this field for a longer period than domestic scholars,which has a profound impact on the evolution of the discipline.This paper presents a systematic review of the development of sediment carrying capacity formula in the West.It outlines the ideas behind the formula,the derivation process and the details of the treatment,and analyses the theoretical and practical value and defects.When tested against the measured data of the lower reaches of the Yellow River,the sand transport capacity formu-las in the West are found less accurate than the formula used by domestic scholars,which makes them difficult to meet the needs of engineering calculations on sandy rivers.Each formula can be regarded as the product of four terms:resistance coefficient,hydrodynamic,inverse sediment factor,and constant.The Tuchengzi section of the Yellow River,which provides access to high-precision observation data,is used for subsequent analysis of the rel-evant factors.It is found that the formulas of Western scholars and those influenced by them weaken the role of sedi-ment influencing factors in the formula structure.Furthermore,most of these formulas exhibited theoretical defects:assuming a proportional relationship between sediment carrying capacity and resistance coefficient.Furthermore,these formulas fail to accurately reflect the dynamic adjustments of riverbeds and water flow.Additionally,the de-termination of coefficients and indices through measured data does not effectively enhance the utility of these formulas.
sediment carrying capacity of flowformula analysisflow resistance
万方数据
维普
