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Page Title:
Appendix H: Calculation of Required Cap Volumes for Level-Bottom Capping Projects (Cont.) |
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 For a circular mound where the cap thickness is decreased over the apron
(Figure H2, the following methodology is given to calculate cap volume:
2
tc
2
2
2
2
tta (rM
rIM)
tpc
0/00 tc
rIM
VM
rIM
rIM
m
(H3)
VM
VCA
VT
where
VM = volume of cap material over dredged material mound
VCA = volume of material in cap apron
VT = total volume of cap material
tpc = thickness of primary cap
tta = thickness of cap at toe of mound apron
tc = change in cap thickness over apron (tpc - tta)
rM = radius of overall dredged material mound
rIM = radius of inner dredged material mound (crest, inner flank and outer
flank)
rTC = radius of total capped surface
m = slope of change in cap thickness (i.e., 1:100!m=0.01)
tc
tc
0/00 tc
tpc r1 r2
VM
r1
r2
m
m
IM
IM
(H4)
(r1 r2)IM
(r1 r2)IM
tta (r1 r2)M
For an elliptic mound where the cap thickness is decreased over the apron,
the following methodology is given to calculate cap volume:
VM
VCA
VT
(H5)
1
[ (r1 r2)TC
(r1 r2)M ] tta
VCA
2
H5
Appendix H Level-Bottom Capping Projects
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