Seepage Face Modeling for Large-Diameter Well in Unconfined Aquifer

Ojha, C. S. P.; Gopal, V.

doi:10.1061/(asce)1084-0699(1999)4:3(275)

Cited by 2 publications

(2 citation statements)

References 7 publications

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“…The seepage face problem for steady state was studied by Boulton (1951), Boreli (1955), Hall (1955), Schneebeli (1956), Polubarinova-Kochina (1962), Heinrich (1964), Brauns (1981), Kovàcs (1981), and Gefell et al (1994and Gefell et al ( , 1995. The seepage face for unsteady state conditions was investigated by Rushton and Holt (1981), Rushton and Singh (1983), Sakthivadivel and Rushton (1989Rushton ( , 1990, S xen (1990), Lee and Leap (1997), Ojha and Gopal (1999), and S xen and C ximen (2001).…”

Section: Introductionmentioning

confidence: 99%

Seepage Face Height, Water Table Position, and Well Efficiency at Steady State

Chenaf¹,

Chapuis

2007

Groundwater

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When a fully penetrating well pumps an ideal unconfined aquifer at steady state, the water table usually does not join the water level in the well. There is a seepage face inside the well, which is a key element in evaluating the well performance. This problem is analyzed using the finite-element method, solving the complete equations for saturated and unsaturated flow. The seepage face position is found to be almost independent of the unsaturated zone properties. The numerical results are used to test the validity of several analytic approximations. Equations are proposed to predict the seepage face position at the pumping well for any well drawdown, and the water table position at any distance from the pumping well for any in-well drawdown. Practical hints are provided for installing monitoring wells and evaluating well efficiency.

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Section: Introductionmentioning

confidence: 99%

Seepage Face Height, Water Table Position, and Well Efficiency at Steady State

Chenaf¹,

Chapuis

2007

Groundwater

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“…Other issues of large-diameter wells such as seepage face, an application of discrete kernel approach and well function approximations are widely discussed in the literatures. For example, Ojha and Gopal [154] proposed a model based on flow velocity to describe the seepage face variation for large-diameter wells in an unconfined aquifer. Sakthivadivel and Rushton [155] considered the dynamic seepage face and gave a methodology to determinate the aquifer parameters from pumping tests with large-diameter wells.…”

Section: Effects Of Finite Well Radius and Wellbore Storagementioning

confidence: 99%