Design of Minimum Seepage Loss Canal Sections

Swamee, Prabhata K.; Mishra, G. C.; Chahar, Bhagu R.

doi:10.1061/(asce)0733-9437(2000)126:1(28)

Cited by 95 publications

(76 citation statements)

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“…Water Management 163 Issue WM8 Discussionfertile land into a huge waste and spoil (Swamee et al, 2000(Swamee et al, , 2001. One of the reasons for water logging of 12 000 ha of land in the Indira Gandhi Canal command in Rajasthan in India is the canal seepage (Swamee et al, 2001(Swamee et al, , 2002.…”

Section: Authors' Replymentioning

confidence: 99%

Discussion: Optimal design of curved bed trapezoidal canal sections

Chahar¹,

Basu²

2010

Proceedings of the Institution of Civil Engineers - Water Manag

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Contribution by A. Laycock, Adrian Laycock LtdInvestigating the theoretical least-cost cross-sectional profile is a favourite academic exercise that has been explored in numerous papers. However, the practical implications of constructing curved section canals are less well documented but far more relevant. In practice the cost is rarely dependent on the theoretical minimum section, and the choice of geometry will depend on various factors, some of which are listed below. lining, which should not create discontinuity-induced internal stress. (e) Ease of placing other lining material, such as less permeable compacted soil or artificial membranes. ( f ) Whether maintenance equipment will be required to operate on the canal bed. (g) The type of sediment expected to be deposited or required to be transported. Curved bed canals are not efficient at transporting coarse sediment, although deposited material will collect in the centre of the channel making it easier to remove during maintenance. (h) Strength of rigid lining. A curved shell is inherently stronger than a section with planar sides and base. A very common cause of failure in trapezoidal lining is cracking at the base of the side slopes where a geometric discontinuity leads to intense stresses from soil pressure, soil movement or external loads. (i) Placing concrete on a long constant slope in a trapezoidal section can be problematic as tension cracks develop owing to slippage of the wet concrete. This is not a problem in large parabolic sections, in which the slope is gradually reducing with depth below the bank top.

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Section: Authors' Replymentioning

confidence: 99%

Discussion: Optimal design of curved bed trapezoidal canal sections

Chahar¹,

Basu²

2010

Proceedings of the Institution of Civil Engineers - Water Manag

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“…where A is Vedernikov's parameter [Harr, 1962] and F s is the seepage function [Chahar, 2000;Swamee et al, 2000Swamee et al, , 2001b, which is a dimensionless function of channel geometry and boundary condition. Using the value of c from equation (6) in equation (7),…”

Section: Analytical Solutionmentioning

confidence: 99%

Analytical solution to seepage problem from a soil channel with a curvilinear bottom

Chahar

2006

Water Resources Research

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[1] An exact analytical solution for the quantity of seepage from a semicircular channel is not available because of difficulties in the conformal mapping. In the present study an inverse method has been used to obtain an exact solution for seepage from a curved channel whose boundary maps along a circle onto the hodograph plane. The solution involves inverse hodograph and Schwarz-Christoffel transformation. The solution also includes a set of parametric equations for the shape of the channel perimeter and loci of phreatic lines. The channel shape is an approximate semiellipse with the top width as the major axis and twice the water depth as the minor axis and vice versa. The average of the corresponding ellipse and parabola gives nearly the exact shape of the channel. Also, this channel is non-self-intersecting and is feasible from a very deep channel to a very wide channel, unlike Kozeny's trochoid shape, which is self-intersecting for a top width to depth ratio less than 1.14. Its seepage function is a linear combination of seepage functions for a slit and a strip. However, this channel allows more seepage loss than a trochoid channel. A special case of the resulting channel is an approximate semicircular section.

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“…Yao et al [15] studied the effect of canal lining and multilayered soil system on canal seepage and found that the combination of canal lining and a low-permeability layer below the canal is effective in reducing seepage. Though perfect canal lining can prevent seepage loss, but cracks can develop in the lining, and the performance of the canal lining deteriorates with time [16]. Wachyan and Ruston [17] studied several canals and concluded that significant seepage losses occur even in a well maintained canal with good lining.…”

Section: Introductionmentioning

confidence: 99%

“…Ilyinsky et al [37] have carried out a comprehensive review of analytical solutions for seepage problems and observed that though numerical techniques have become more significant in solving practical problems of seepage theory but analytical methods are necessary not only to develop and test the numerical algorithms but also to gain a deeper understanding of the underlying physics, as well as for the parametric analysis of complex flow patterns and the optimization and estimation of the properties of seepage fields. Swamee et al [38] obtained an analytical solution for seepage from a rectangular canal in a soil layer of finite depth overlying a drainage layer using inversion of hodograph and conformal mapping technique. Bardet and Tobita [39] presented finite difference approach for calculating unconfined seepage using spread-sheets.…”

Section: Introductionmentioning

confidence: 99%

“…It provides a set of parametric equations for the location of phreatic line. To reduce the conveyance losses due to seepage, many researchers have provided methods to design the canals for minimum seepage [20,38,42,43]. Ayvaz and Karahan [44] provided spreadsheet application of three-dimensional (3D) seepage modeling with an unknown free surface.…”

Section: Introductionmentioning

confidence: 99%

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Prediction of Water Logging Using Analytical Solutions—A Case Study of Kalisindh Chambal River Linking Canal

Kongre¹,

Goyal²

2013

JWARP

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The canals are designed to transport water to meet irrigation and other water demands or to divert water from surplus basins to deficient basins to meet the ever increasing water demands. Though the positives of canal network are increase in agricultural output and improvement in quality of life, the negatives of canal introduction and irrigation, along its route, are inherent problems of water logging and salinity due to seepage from canals and the irrigation, when not managed properly. To plan strategies to prevent waterlogging and salinity, it is necessary to predict, in advance, the probable area which would be affected due to seepage. This paper presents a methodology to predict the area prone to water logging due to seepage from canal by using 2D seepage solutions to 3D field problem. The available analytical solutions for seepage from canals founded on pervious medium and asymmetrically placed drains, have been utilized. The area, prone to waterlogging, has been mapped using GIS.

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Design of Minimum Seepage Loss Canal Sections

Cited by 95 publications

References 5 publications

Discussion: Optimal design of curved bed trapezoidal canal sections

Discussion: Optimal design of curved bed trapezoidal canal sections

Analytical solution to seepage problem from a soil channel with a curvilinear bottom

Prediction of Water Logging Using Analytical Solutions—A Case Study of Kalisindh Chambal River Linking Canal

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