coastal evolution,
Matlab
averaged channel cross-sectional depth, averaged channel cross-sectional width; floodplain width; manning coefficients of the channel and floodplain; longitudinal channel slope; Channel bed's super-elevation above the floodplain where sedimentation rate is close to 0; M-coefficient for erosion rate for the bottom of crevasse splay; M-coefficient for erosion rate for the two side slopes of crevasse splay; critical velocity for erosion; critical velocity for deposition; width of dike at the root; cross valley slope; settling velocity of suspended load in the channel.
averaged daily crevasse splay depth; averaged daily crevasse splay width
A ratio of Q above the bottom of crevasse splay can be distributed to outflow of crevasse splay. After flow parameters for the outflow of crevasse splay are calculated, the erosion (deposition) rate of crevasse splay can be calculated, thus the morphology of crevasse splay can be updated.
When the crevasse splay has not yet cut down to the lowest point max(hs,Zcsb), it can be both widened and deepened. When the crevasse splay has cut down to the lowest point max(hs,Zcsb), it can only be widened or silted vertically.
Key physical equations:
resolution constraint: centimeter
resolution constraints: day
Qs(kg/s): daily sediment flux series, 365 by 1 matrix The trigger flood event is set at the 232th day
{Qd,Delta_hcs,Bcs,Delta_hcsd,Bcsd,Qout,Qcs,Zcs,Hcs,Vcs}=mainCS(Q,Qs,365,232,1,2,965,2.3,4795,0.009,0.03,1.377e-4,-2,0.0005,0.004,1.5,0.7,1800,2.5e-4,25,4.5e-4)
This part will be filled out by CSDMS staff
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