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of 19 channels and 138 subbasins from a 30-meter resolution DEM, as illustrated in
Fig. 8.12.
Bingner
et al
. (1997) used SWAT to simulate the runoff and sediment loads in the
watershed for 1192 storm events from 1978 to 1995. Wu and Vieira (2002) computed
the flow routing, sediment transport, and morphological evolution in the channels
using CCHE1D, with the watershed model results given as inputs. The channel simu-
lation considered the effects of ten in-stream measuring flumes and four box culverts.
Fig. 8.15 shows the calculated and measured thalweg changes in the lower 3-km reach
upstream of the watershed outlet (flume No. 1) from 1978 to 1992. The model repro-
duced well the patterns of erosion and deposition. Fig. 8.16 shows the calculated and
measured sediment yields at the watershed outlet. The level of observed agreement
is good.
