水流挟沙力公式的验证与评述

Verification and Evaluation on River Sediment Carrying Capacity Formula

River sediment carrying capacity is a comprehensive index reflecting the sediment carrying capacity of flow under the conditions of equilibrium of scouring and deposition. According to applicable range of sedi ment concentration, the formula can be classified into three types and it also can be classified into four types if it is derived based on the formula. The formulas of foreign countries are verified by using the observed data of Laoburara River in Nebraska of the United States, showing Yang Zhida' s formula is the most reli able; then using observed data of the lower Yellow River to verify some typical Chinese sediment carrying capacity formulas, show Zhang Hongwu's formula is the most successful to tally with the observed data.