At this point the output table names and information specified become the
same. Table 2.7 gives the density of the sediment deposit, another possible input
variable. Table 3.1, "Calculated Yields," echoes to the screen in the drop down
area of the Sediment Yield Input screen as well as printing to the output file.
This table provides the "answers" for the SAM.yld option, giving the sediment
yield in both tons and cubic yards, and echoing the time period, in days, as input
on Figure 8.3 or 9.4. It also lists the sediment transport function used for that
data set.
Table 3.2 is the "Distribution of Yield by Water Discharge Class Interval."
The first column, "Class," is `20' in the example problems, because in the
"Optional Data" area on the "Sediment Yield Input" screen, the "Number of
Output Class Intervals" was left at the default of 20. The number of intervals
into which the range of flows is divided can be changed with this input
parameter. When a flow duration curve has been input, Table 3.2 can be used to
determine the effective discharge the discharge that moves the most sediment.
The effective discharge can be determined by looking for the class that has the
largest "increment of sediment." Copeland et al. (2001) has a discussion of
effective discharge in chapter 3.
The end of the output for this data set is marked with "...END OF JOB..." and
a note with the output filename. If the input file has stacked jobs, the next data
set will begin with a new program banner.
If some discharges in the flow-duration or hydrograph information fall outside
the range of discharges in the sediment discharge rating curve, the program will
inform the user. These messages will print out in connection with the
"Integration Parameters" table. The program will then assign a sediment
discharge in tons per day to the water discharge value that is out of range, based
on the existing sediment discharge table, Table 2.1. This is the "YOUT" value
listed in the "INDEPENDENT VARIABLE XIN OUT OF TABLE BOUNDS"
message if it appears.
Plotting
SAM.yld has no plotting capabilities at this time.
142
Chapter 8
Input Requirements and Program Output for SAM.yld
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