CETN IV-20
September 1999
Figure 5. Sediment budget for "Pre-Inlet: Final"
Step 3: Post-Inlet: Initial Impoundment. Within SBAS, the "Pre-Inlet: Final" sediment
budget was copied to another alternative and titled "Post-Inlet: Initial Impoundment." Values
were set so that Q3=Q4=Q5=Q6=0, indicating that no sediment was transported over or through
the jetties. Values of adjacent beach erosion or accretion were calculated using the "force
balance cell" option for calculating ∆V. Associated uncertainties δ(∆V) were set at
approximately 35 percent of the value, as occurred for the pre-inlet case. Figure 6 shows the
sediment budget representing initial impoundment.
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