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contributor.authorKhatua, K K-
contributor.authorPatra, K C (Guide)-
date.accessioned2008-04-24T05:26:31Z-
date.available2008-04-24T05:26:31Z-
date.issued2007-
identifier.citationInteraction 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 Rourkelaen
identifier.urihttp://hdl.handle.net/2080/663-
descriptionCopyright for the Thesis belongs to NIT Rourkelaen
description.abstractReliable 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.extent6639457 bytes-
format.mimetypeapplication/pdf-
language.isoen-
publisherNational Institute of Technology, Rourkelaen
titleInteraction of Flow and Estimation of Discharge in two Stage Meandering Compound Channelsen
typeThesisen
Appears in Collections:Thesis (Doctor of Philosophy)

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