Quasi two-dimensional model for straight overbank flows through emergent

Rameshwaran, Ponnambalam; Shiono, K.

doi:10.1080/00221686.2007.9521765

Cited by 92 publications

(66 citation statements)

References 11 publications

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“…In such a vegetated case, the vertical profiles of velocity are no longer logarithmic (e.g. Green, 2005;Naden et al, 2006;Wharton et al, 2006) and the resistance to the flow is significantly derived from the drag force due to vegetation rather than the bed friction or resistance associated with secondary flow (Rameshwaran and Shiono, 2007). The hydraulic impacts of weed cutting were monitored as described below.…”

Section: River Hydraulicsmentioning

confidence: 99%

Instream and riparian implications of weed cutting in a chalk river

Old

Naden

Rameshwaran

et al. 2014

Ecological Engineering

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were monitored at a site on the River Lambourn (The CEH River Lambourn Observatory) and major instream and riparian impacts were observed. Measurements clearly demonstrated how weed cutting enhanced flood flow conveyance, reduced water levels (river and wetland), increased river velocities, and mobilised suspended sediment (with associated chemicals) and reduced the capacity for its retention within the river channel. Potential implications in relation to flood risk, water resources, downstream water quality, instream and riparian ecology, amenity value of the river, and wetland greenhouse gas emissions were considered. Provided the major influence of macrophytes on instream and riparian environments is fully understood then the manipulation of macrophytes represents an effective management tool that demonstrates the great potential of working with nature.

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Section: River Hydraulicsmentioning

confidence: 99%

Instream and riparian implications of weed cutting in a chalk river

Old

Naden

Rameshwaran

et al. 2014

Ecological Engineering

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“…In recent d ecades, the three-dimensional flow structure, turbulence characteristics and secondary flows in straight compound channels have been extensively investigated by, amongst others, Knight and Demetriou [14], Pasche and Rouve [25], Knight and Sellin [15], Tominaga et al [41], Yuen [45], Carling et al [3] and Yang et al [43]. Moreover, lateral distribution methods (LDM) for the depth-averaged velocity and bed shear stress, along with the secondary flow and the planform vorticity, have been developed by Shiono and Knight [31], Cao et al [2], Rameshwaran and Shiono [29], Huai et al [9], Hu et al [8]，Liu et al [20] and Yang et al [44]. These researchers showed that the secondary flows affect the predictions of velocity and bed shear stress significantly and ignoring them leads to poor results.…”

Section: Introductionmentioning

confidence: 99%

An analytical model for lateral depth-averaged velocity distributions along a meander in curved compound channels

Wright

Liu

Yang

2014

Advances in Water Resources

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“…The Darcy-Weisbach friction factor ( f i ) is usually backcalculated by the depth-averaged velocities and boundary shear stresses (Rameshwaran and Shiono, 2007;Shiono and Knight, 1991). However, instruments were not available for measuring the boundary shear stresses in the experiments reported here, and the data for bed shear stress were not reported by Lambert and Sellin (1996), Shiono et al (1999) or Spooner (2001.…”

Section: Darcy-weisbach Friction Factormentioning

confidence: 89%