中文摘要：

利用不同时期黄河宁蒙河段各水文站的日均流量和日均含沙量、月均流量和月均含沙量数据，研究了流量与输沙率之间的关系，以及输沙率与流量及上游来水含沙量之间的关系。针对宁蒙河段各水文站不同时期的输沙率公式，探讨了输沙率的影响因素及输沙率公式中系数与指数关系。结果表明：黄河宁蒙河段的河道输沙率主要受河道的水力几何形态、河道来水来沙条件影响；河道输沙率公式中系数的对数与指数呈反比关系（决定系数达到0．98），并且系数和指数的大小与河道冲淤密切相关。

英文摘要：

Based on daily and monthly records of water discharge and suspended sediment concentration （ SSC ） at stations in different periods in the Ningxia-Inner Mongolia reaches of the upper Yellow River, the relationship between daily water discharge and daily sediment delivery rate and the relationship between sediment delivery rate and monthly water discharge and monthly SSC from upstream were studied. With the established formulas of sediment delivery rate, this paper discussed the affects of factors on sediment delivery rate and the relationship between parameters of sediment carry capacity formula. Results show that sediment delivery rate of the Ningxia-Inner Mongolia reaches is closely related to the hydraulic geometry of the river channel and the characteristics of sediment dynamics. The exponents and logarithmic coefficients of sediment carry capacity formulas are negatively correlated with a correlation coefficient r2 of 0.98, and they have a close relationship to the scouring and deposition of the channel.