Lecture No.8: Flood Routing
Автор: Sobhy Emara Channel
Загружено: 2023-12-06
Просмотров: 778
Описание:
The flood hydrograph is in fact a wave.
As this wave moves down the river, the shape of the wave gets modified due to various factors, such as channel storage, resistance, lateral addition or withdrawal of flows, etc.
When a flood wave passes through a reservoir, its peak is attenuated and the time base is enlarged due to the effect of storage.
Flood waves passing down a river have their peaks attenuated due to friction if there is no lateral inflow.
The study of the basic aspects of these changes in a flood wave passing through a reservoir or a channel system forms the subject matter of this Lecture.
Flood routing is the technique of determining the flood hydrograph at a section of a river by utilizing the data of flood flow at one or more upstream sections.
The hydrologic analysis of problems such as flood forecasting, flood protection, reservoir de-sign and spillway design invariably include flood routing.
In these applications two broad categories of routing can be recognized. These are:
1. Reservoir routing, and 2. River or Channel routing.
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