Simplified methods for computing total sediment discharge with the modified Einstein procedure

Abstract

PLATE 1. Nomograph for computing .VCRS)m and P. 2. Nomograph for computing iBQn. 3. Nomograph for computing z 2 from Q.'/iBQB=(lt"/J 1 ")(PJ.'+J:/). 4. Vertical distribution of streamflow. 5. Graphfor computing z's for each size fraction from the reference z. 6. Nomograph for computing Qa'(PJ 1 "+J 2 ")/(PJ•'+J2'). 7. Function 1 1 " in terms of A" and z.

Field methods for measurement of fluvial sediment

“…Rather than direct measurement, bedload movement is usually computed by one or more of several different formulas. The most notable and used of these have been described by Colby and Hubbell (1961), Einstein (1950), Chang, Simons, andMeyer-Peter andMuller (1948). For these reasons, only one bedload sampler is described in this manual.…”

Aspects of flow resistance and sediment transport, Rio Grande near Bernalillo, New Mexico

“…However, there are some indirect indications that the minor variations of the bed material are important, as was suggested by Kennedy (1961b). Figure 14 shows the transport rates of bed material at section A-2 plotted against the transport rates at section F. The rates were computed using the modified Einstein method (Colby and Hubbell, 1961), the data in tables 1 through 4, and the average bed material size distribution of figure 2. There is a systematic deviation toward higher transport rates at section F. In figure 15, the transport rates were computed using the individual bed-material size distributions in tables 5 and 6.…”

“…Sediment transport rates are computed by the modified Einstein method (Colby and Hubbell, 1961) and by the method proposed by E. M. Laursen (1958). For several observations, transport rates are estimated using the Einstein bed-load function (Einstein, 1950).…”

“…Table 11 presents a re"sum6 of the velocities, channel widths, and bed-material transport rates at sections A-2 and F for the observations on April 6, 1960, andJune 22, 1960. All sediment coarser than 0.062 mm was considered bed material, and total transport rates were computed both by the modified Einstein method (Colby and Hubbell, 1961) and by the method proposed by Laursen (1958). For April 6, the velocity was about the same at both sections, and the transport rate at section F, estimated by either method, was considerably greater than the transport rate at section A-2.…”

Fluxes in Suspended Sediment Concentration and Total Dissolved Solids Upstream of the Galma Dam, Zaria, Nigeria

“…They account for the largest majority of the stream load in many rivers and consist of materials such as clay and silt. Suspended Sediment Concentration (SSC) is the volume of suspended sediments at successive depths along the vertical profile of a river, from the water surface to close the river bed (Colby and Hubbell, 1961). Walling and Kleo (1979) added that information on the magnitude of the suspended loads of rivers has many practical applications ranging from geomorphologic studies of denudation rates and patterns of landform development to problem of upstream soil loss and downstream channel and reservoir sedimentation.…”