Environmental Engineering Reference
In-Depth Information
Condition at the start (F
si
)
T > 0
Canal condition
changing?
F
s
= 1
N
Canal condition at
the end (F
se
)
T > 0
Maintenance?
Y
N
F
s
= F
si
+ (F
smax
- F
si
)
*
T/TIP
T > 0
Maintenance
type?
Ideal
F
s
= 1
Periodic
Before
maintenance
F
s
= F
si
+ (F
sb
- F
si
)
*
T/PMT
Canal condition at the beginning (F
si
)
Canal condition before maintenance (F
sb
)
Canal condition after maintenance (F
sa
)
After
maintenance
F
s
= F
sa
+ (F
sb
- F
sa
)
*
T/PMT
Legend:
PMT = Maintenance interval
F
w
= weed factor
T = time under consideration
TIP = total irrigation period
Figure F.2.
Roughness adjustment procedure for the changing canal condition with or without maintenance scenarios (Paudel,
2010).
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