Modeling Well Hydrodynamics
Publication: Journal of Hydraulic Engineering
Volume 124, Issue 12
Abstract
One of the limiting factors in determining design discharge for water wells is the entrance velocity into the well screen. Most of the well designs assume uniform flow along the well screen and do not consider the complex flow either along the screens or in the well proper. Several investigators have shown that the flow into well screens may be highly nonuniform, and designs based on uniform flow may be improper. Moreover, the traditional well design locates the pump intake above the well screen, which may maximize the nonuniformity of screen entrance velocity. This investigation proposes a finite-difference model that determines the fluid flows into, around, and in the well screen. Results show that locating the pump intake between 30 and 45% down from the screen top minimizes the differential entrance velocity and total drawdown.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Chapra, S. C., and Canale, R. P. (1985). Numerical methods for engineers. McGraw-Hill Inc., New York.
2.
Cooley, R. L., and Cunningham, A. B.(1979). “Consideration of total energy loss in theory of flow to wells.”J. Hydro., 43, 161–184.
3.
Driscoll, F. G. (1986). Groundwater and wells, 2nd Ed., Johnson Div., St. Paul, Minn.
4.
Garg, S. P., and Lal, J.(1971). “Rational design of well screens.”J. Irrig. and Drain. Div., ASCE, 97(1), 24–35.
5.
Helweg, O. J.(1975). “Determining optimal well discharge.”J. Irrig. and Drain. Div., ASCE, 101(3), 135–142.
6.
Helweg, O. J., VonHofe, F., and Quek, P. T. (1991). “Improving well hydraulics.”Proc., Irrig. and Drain. Spec. Conf., 423–434.
7.
Kaleris, V. (1989). “Inflow into monitoring wells with long screens.”Proc., Int. Symp. on Contaminate Transport in Ground-Water, Univ. of Stuttgart, Stuttgart, Germany, 231–244.
8.
Melville, J. G., Molz, F. J., and Guven, O.(1985). “Laboratory investigation and analysis of a ground water flowmeter.”Ground Water, 23(4), 486–494.
9.
Roscoe Moss Co. (1990). Handbook of ground water development. John Wiley & Sons, Inc., New York.
10.
“Standards for water wells.” (1984). A100-84. Am. Water Works Assn., Denver, Colo.
11.
VonHofe, F. P. (1998). “Optimal well design.” Dept. of Civ. Engrg., Univ. of Memphis, Memphis, Tenn.
12.
Young, S. C., and Boggs, J. M. (1989). “Development of a driven multilevel groundwater sampling well and instrumentation for measuring vertical hydraulic gradient over short distances.”Engrg. Rep., Tennessee Valley Authority, Tenn.
Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 124 • Issue 12 • December 1998
Pages: 1198 - 1202
Copyright
Copyright © 1998 American Society of Civil Engineers.
History
Published online: Dec 1, 1998
Published in print: Dec 1998
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.