220 Computational Modelling in Hydraulic and Coastal Engineering
for j=1:ny
for i=1:nx
if c(i,j)>cmax(i,j)
cmax(i,j)=c(i,j);
end
end
end
index=k
end
[i,j]=meshgrid(1:1:nx,1:1:ny);
df1=fDep(:,3);
df2=reshape(df1,22,23);
df2=df2';
An=ones(size(df2));
idx=find(df2== 0);
An(idx)=0;
figure;
pcolor(An);
colormap(jet);
shading flat;
hold on;
i=1:nx;
j=1:ny;
Cplot=cmax(i,j)/ipp;
contour(i,j,Cplot')
% colorbar('vert')
PROBLEM 8.4
Solve the same problem by making the suggested modifications while keeping the rest of the data constant:
1. Place the contaminant point source at location x = 16 km, y = 34 km.
2. The source ceases to pollute after 1440 minutes.
3. Replace the decay coefficient with a growth coefficient of the same rate.
4. Place two additional pollutant sources at locations (28 km, 20 km)
and (32 km, 16 km).
5. Change the time step to Δt = 120 min, 180 min and 240 min.
Run the simulations, compare the results and comment on the changes
observed regarding the spreading of the contaminant plume.
8.4 MECHANICS OF SEDIMENT TRANSPORT
8.4.1 General concepts of sediment transport
The sediment transport phenomena constitute an integral part of inland
and coastal hydraulics, since sediment dynamics and sediment quality can