Fig. 6.
The switching of the delta lobe during the simulation. Comparing a and b, a type I switching can be identified where the main part of the delta lobe is abandoned close to the mouth of the river, just before the river splits into several distributaries and forms a new lobe beside. Another type of delta switching is shown comparing b and c, with two snapshots from the simulation. Here, the channel switches far upstream and takes a new course to the coast forming another delta lobe far away. This is referred as a switching of type II. The parameters for the simulation where I0 = 1.7 × 10−4, s0 = 5 × 10−5, c2 = 0.0005, c1 = 0, and I* = 3.3 × 10−4. The simulation was run on a 179 × 179 lattice with smoothening every 2,000 time steps and a smoothening constant of ε = 0.0001.