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FLOOD
ROUTINGIwan Kridasantausa
Flow Routing
Procedure to determine the flow hydrograph at a point on a watershed from a known hydrograph upstream
As the hydrograph travels, it attenuates gets delayed
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Why route flows?
Account for changes in flow hydrograph as a flood wave passes downstream
This helps in Accounting for storages Studying the attenuation of flood peaks
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EXAMPLE 1
Storage Computations
SOLUTION…
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EXAMPLE 2
River and Reservoir Routing Concepts
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HYDROLOGIC RIVER ROUTING
FIGURE 4.2 STORAGE IN A RIVER REACH
FIGURE 4.3 PRISM AND WEDGE STORAGE CONCEPT
(4.2)
MUSKINGUM METHOD
Where
(4.3)
(4.4)
(4.5)
(4.6)
(4.7)
(4.8)
(4.9)
(4.10)
EXAMPLE 3Muskingum Routing
SOLUTION….
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DETERMINATION OF STORAGE CONSTANT
Figure 4.4 Selection of Muskingum Coefficients
EXAMPLE 4
Determination of The Muskingum Routing Coefficients
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HYDROLOGIC RESERVOIR ROUTING
Storage Indication Method
(4.13)
EXAMPLE 5
Storage Indication Rounting