To get the total travel time, the time the water is flowing in the ditch must also be calculated. Path 1B will be
calculated using the ditch flow table. Go back to the tabulated format. Path 1B has a slope of 0.9 percent. Using
the equation on page 2-16 and the above listed information on path 1B, the travel time is calculated as:
Now calculate ditch time for paths 2B and 3B. Use the information provided in the tabulated format on table 2-6,
page 2-18, and the ditch flow table (table 2-5). The total travel time can be obtained by adding the sheet flow
time and the ditch flow time for the respective path.
Table 2-5. Ditch flow