不同粒径下悬移质含沙量垂线分布公式的验证与比较

泥沙扩散理论是研究悬移质含沙量垂线分布应用最广泛的理论。介绍扩散理论并评述由扩散理论衍生出的Rouse公式、张小峰公式以及Zagustin公式。分别采用粗颗粒及细颗粒泥沙实测资料对3个公式进行验证比较,并对验证结果进行分析。结果表明:在粗颗粒情况下张小峰公式精度较高;在细颗粒情况下3个公式与实测资料均有较大出入,但对分布指数进行修正后Rouse公式及Zagustin公式精度较高。

Verification of vertical distribution formula of suspended sediment concentration under different sediment grain sizes

Sediment diffusion theory is widely used in the study of suspended load sediment concentration vertical distribution. The paper introduced diffusion theory that derives sand Rouse formula, Zhang Xiaofeng formula and Zagustin formula.It used coarse and fine sediment to verify respectively the three formulas, and analyzed the results.The results show that under the condition of coarse particle, Zhang Xiaofeng formula has more precision; under the condition of fine particle , there are large difference between the results of three formulas and experiment data,but Rouse and Zagustin formula show higher precision after revising distribution index.