On the prediction of groundwater mound formation due to transient recharge from a rectangular area

N., S.; Singh, R. N.

doi:10.1007/bf00424202

Cited by 26 publications

(27 citation statements)

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“…The mounding results from the accretion of the descending infiltrating water body (Figures 20 and 21) onto the surface of the water table (Figure 22), prior to its eventual absorption into the underlying water body [45]. The shape and height of this type of mound is a function of the shape of the recharge area, recharge rate, intrinsic permeability (or hydraulic conductivity) of the sediment and the thickness of the aquifer [45,[56][57][58][59][60][61][62][63]. The infiltrating water body ( Figure 20) will only extend to the water table during recharge, if the recharge interval is of sufficiently long duration.…”

Section: Comparison Of Observed Results With a Traditional Groundwatementioning

confidence: 99%

“…Hydrological theory suggests that infiltration into high permeability sediments overlying a water table (Figures 20 and 21), results in the mounding of the underlying water table (Figure 22) [56][57][58][59][60][61][62][63]. The mounding results from the accretion of the descending infiltrating water body (Figures 20 and 21) onto the surface of the water table (Figure 22), prior to its eventual absorption into the underlying water body [45].…”

Section: Comparison Of Observed Results With a Traditional Groundwatementioning

confidence: 99%

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Formation and Control of Self-Sealing High Permeability Groundwater Mounds in Impermeable Sediment: Implications for SUDS and Sustainable Pressure Mound Management

Antia¹

2009

Sustainability

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A groundwater mound (or pressure mound) is defined as a volume of fluid dominated by viscous flow contained within a sediment volume where the dominant fluid flow is by Knudsen Diffusion. High permeability self-sealing groundwater mounds can be created as part of a sustainable urban drainage scheme (SUDS) using infiltration devices. This study considers how they form, and models their expansion and growth as a function of infiltration device recharge. The mounds grow through lateral macropore propagation within a Dupuit envelope. Excess pressure relief is through propagating vertical surge shafts. These surge shafts can, when they intersect the ground surface result, in high volume overland flow. The study considers that the creation of self-sealing groundwater mounds in matrix supported (clayey) sediments (intrinsic permeability = 10 -8 to 10 -30 m 3 m -2 s -1 Pa -1 ) is a low cost, sustainable method which can be used to dispose of large volumes of storm runoff (<20→2,000 m 3 /24 hr storm/infiltration device) and raise groundwater levels.However, the inappropriate location of pressure mounds can result in repeated seepage and ephemeral spring formation associated with substantial volumes of uncontrolled overland flow. The flow rate and flood volume associated with each overland flow event may be substantially larger than the associated recharge to the pressure mound. In some instances, the volume discharged as overland flow in a few hours may exceed the total storm water recharge to the groundwater mound over the previous three weeks. Macropore modeling is used within the context of a pressure mound poro-elastic fluid expulsion model in order to analyze this phenomena and determine (i) how this phenomena can be used to extract large volumes of stored filtered storm water (at high flow rates) from within a self-sealing high permeability pressure mound and (ii) how self-sealing pressure mounds (created using storm OPEN ACCESSSustainability 2009, 1 856 water infiltration) can be used to provide a sustainable low cost source of treated water for agricultural, drinking, and other water abstraction purposes.

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Section: Comparison Of Observed Results With a Traditional Groundwatementioning

confidence: 99%

Section: Comparison Of Observed Results With a Traditional Groundwatementioning

confidence: 99%

Formation and Control of Self-Sealing High Permeability Groundwater Mounds in Impermeable Sediment: Implications for SUDS and Sustainable Pressure Mound Management

Antia¹

2009

Sustainability

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“…Previous articles have discussed groundwater mounds in response to localized recharge into aquifers with various hydraulic parameters (e.g., Dagan, 1967;Rao and Sarma, 1980;Latinopoulos, 1986;Manglik et al, 1997;Manglik and Rai, 1998;Rai et al, 1998;Chang and Yeh, 2007;Illas et al, 2008;Bansal and Das, 2010;Bansal and Teloglou, 2013). Flow velocity fields below groundwater mounds have also been analyzed Ledder, 1992, 1993).…”

Section: Resultsmentioning

confidence: 99%

“…Most articles (e.g., Rai et al, 1998;Chang and Yeh, 2007;Illas et al, 2008;Bansal and Teloglou, 2013) define a transient recharge rate as I t (t) = I 1 + I 0 exp(−r t) (i.e., ξ t (t) = ξ 1 + ξ 0 exp(−γ t) for a dimensionless rate) where…”

Section: Transient Recharge Ratementioning

confidence: 99%

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Technical Note: Three-dimensional transient groundwater flow due to localized recharge with an arbitrary transient rate in unconfined aquifers

Chang

Huang

Yeh

2016

Hydrol. Earth Syst. Sci.

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Abstract. Most previous solutions for groundwater flow induced by localized recharge assumed either aquifer incompressibility or two-dimensional flow in the absence of the vertical flow. This paper develops a new three-dimensional flow model for hydraulic head variation due to localized recharge in a rectangular unconfined aquifer with four boundaries under the Robin condition. A governing equation describing spatiotemporal head distributions is employed. The first-order free-surface equation with a source term defining a constant recharge rate over a rectangular area is used to depict water table movement. The solution to the model for the head is developed with the methods of Laplace transform and double-integral transform. Based on Duhamel's theorem, the present solution is applicable to flow problems accounting for arbitrary time-dependent recharge rates. The solution to depth-average head can then be obtained by integrating the head solution to elevation and dividing the result by the aquifer thickness. The use of a rectangular aquifer domain has two merits. One is that the integration for estimating the depth-average head can be analytically achieved. The other is that existing solutions based on aquifers of infinite extent can be considered as special cases of the present solution before the time when the aquifer boundary had an effect on head predictions. With the help of the present solution, the assumption of neglecting the vertical flow effect on the temporal head distribution at an observation point outside a recharge region can be assessed by a dimensionless parameter related to the aquifer horizontal and vertical hydraulic conductivities, initial aquifer thickness, and the shortest distance between the observation point and the edge of the recharge region. The validity of assuming aquifer incompressibility is dominated by the ratio of the aquifer specific yield to its storage coefficient. In addition, a sensitivity analysis is performed to investigate the head response to the change in each of the aquifer parameters.

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Artificial Recharge of Unconfined Aquifer

Rai

Singh

2004

Water Encyclopedia

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Groundwater plays a major role in augmenting water supply to meet the ever‐increasing demands for domestic, agricultural, and industrial usages. Increasing dependence of water supply on groundwater resources leads to more use of aquifers as a source of fresh water supply and subsurface reservoir for storing excess surface water. The advantage of unconfined aquifers over confined aquifers to serve as subsurface reservoir is that the storage of groundwater in large quantity is possible only in unconfined aquifer, which is because the storativity of the unconfined aquifer is linked to the porosity and not to the elastic properties of the water and solid matrix, as in case of the confined aquifer. Also, the vast surface area of the unconfined aquifer above the water table is available to receive the surface applied recharge, whereas in case of the confined aquifer, only a small open area exposed near to the ground surface or leaky portion of the aquifer boundary is available to receive the recharge. This article deals with artificial recharging of the unconfined aquifer and related problems.

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On the prediction of groundwater mound formation due to transient recharge from a rectangular area

Cited by 26 publications

References 10 publications

Formation and Control of Self-Sealing High Permeability Groundwater Mounds in Impermeable Sediment: Implications for SUDS and Sustainable Pressure Mound Management

Formation and Control of Self-Sealing High Permeability Groundwater Mounds in Impermeable Sediment: Implications for SUDS and Sustainable Pressure Mound Management

Technical Note: Three-dimensional transient groundwater flow due to localized recharge with an arbitrary transient rate in unconfined aquifers

Artificial Recharge of Unconfined Aquifer

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