论文部分内容阅读
黄河下游河道的冲淤为沿程冲淤与溯源冲淤综合作用的结果。沿程冲淤主要与河流流量及含沙量的变化有关,而溯源冲淤是由于河流下游基准面的变化,主要为河长的改变引起。这样,黄河下游河道的冲淤可用一包括流量、含沙量及河长三个指标的多元线性方程来拟合。根据1950-1992年黄河下游各站3000m ̄3/s水位的年变化数据、黄河尾闾各年汛后的河长及年平均流量、年平均含沙量等资料,利用多元线性回归的方法分析黄河下游各站的冲淤变化,结果表明这一方法在黄河下游各河段应用效果较好。反映出沿程冲淤的影响,在洛口以上河段是显著的,并且为主要影响因素;溯源影响则在利津以下河段是显著的,影响程度超过沿程冲淤。
Scouring and silting in the lower reaches of the Yellow River is the result of scouring and silting along the river and trace erosion and deposition. Erosion and deposition along the process are mainly related to changes in river flow and sediment concentration. Traceability and erosion are due to changes in the lower reaches of the river and are mainly caused by river length changes. In this way, the scouring and silting of the lower reaches of the Yellow River can be fitted with a multivariate linear equation including three indicators: flow rate, sediment concentration and river length. According to the annual variation data of 3000m ~ 3 / s water level of the stations in the lower reaches of the Yellow River from 1950 to 1992, the river length, annual average flow and annual average sediment after the flood season in the tail of the Yellow River, the multivariate linear regression analysis Scouring and silting changes at various stations in the lower reaches of the Yellow River show that this method is effective in all the lower reaches of the Yellow River. Which reflects the influence of scour and silting along the route. It is significant in the section above Lokou and is the main influential factor. The traceable effect is significant in the reach of Lijin below, and the influence degree exceeds the scouring and silting along the route.