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http://hdl.handle.net/2080/663
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| DC Field | Value | Language |
|---|
| contributor.author | Khatua, K K | - |
| contributor.author | Patra, K C (Guide) | - |
| date.accessioned | 2008-04-24T05:26:31Z | - |
| date.available | 2008-04-24T05:26:31Z | - |
| date.issued | 2007 | - |
| identifier.citation | Interaction of Flow and Estimation of Discharge in two Stage Meandering Compound Channels, In Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy in Civil Engineering , Submitted to National Institute of Technology Rourkela | en |
| identifier.uri | http://hdl.handle.net/2080/663 | - |
| description | Copyright for the Thesis belongs to NIT Rourkela | en |
| description.abstract | Reliable estimates of discharge capacity are essential for the design, operation, and
maintenance of open channels, more importantly for the prediction of flood, water
level management, and flood protection measures. In nature, most rivers tend to be
of compound sections as well as meandering. For the management of rivers and
floodplains, it is important to understand the behavior of flows within compound
channels. Cross sections of these compound channels are generally characterized
by deep main channel bounded by relatively shallow flood plains at one or both
sides. At low depths when the flow is only in the main channel, conventional methods
are generally used to assess discharge capacity. When the flow goes over bank, the
classical single channel formula gives large error between the estimated and the
observed discharge. Standard sub-division and composite roughness methods given
in Chow (1959) are essentially flawed when applied to compound channels. The
discharge calculation for compound channel is based mainly on refined one
dimensional methods of analysis. However, two dimensional (2D) approaches
(Shiono & Knight, 1988; Knights & Shiono1996; Knights & Abril1996) and three
dimensional analysis (Shiono & Lin 1992; Younis 1996) are more complex and
inconvenient to use in practice. The basic idea of one dimensional approach is to
subdivide the channel into a number of discrete sub areas, usually the main channel
and adjacent flood plains. Discharge for each part is calculated with or without
consideration of interaction effect and sum them, possibly with some adjustment to
give the total channel discharge. Review of the literature show that investigators
propose alternative interface planes to calculate the total discharge carried by a
compound channel section. Either including or excluding the interface length with the
wetted perimeter does not make sufficient allowance for discharge calculation for all
depths of flow over floodplain. It either overestimates or underestimates the
discharge result. Investigation is made on the methods for predicting discharge in
straight and meandering compound channels. Finally a comparison is made between
the different discharge approaches. | en |
| format.extent | 6639457 bytes | - |
| format.mimetype | application/pdf | - |
| language.iso | en | - |
| publisher | National Institute of Technology, Rourkela | en |
| title | Interaction of Flow and Estimation of Discharge in two Stage Meandering Compound Channels | en |
| type | Thesis | en |
| Appears in Collections: | Thesis (Doctor of Philosophy)
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| File |
Description |
Size | Format |
|---|
| thesis-final-khattuva.pdf | | 6483Kb | Adobe PDF | View/Open |
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