Bias in groundwater samples caused by wellbore flow
Journal of Hydraulic Engineering
By: Thomas E. Reilly, O. Lehn Franke, and Gordon D. Bennett
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Abstract
Proper design of physical installations and sampling procedures for groundwater monitoring networks is critical for the detection and analysis of possible contaminants. Monitoring networks associated with known contaminant sources sometimes include an array of monitoring wells with long well screens. The purpose of this paper is: (a) to report the results of a numerical experiment indicating that significant borehole flow can occur within long well screens installed in homogeneous aquifers with very small head differences in the aquifer (less than 0.01 feet between the top and bottom of the screen); (b) to demonstrate that contaminant monitoring wells with long screens may completely fail to fulfill their purpose in many groundwater environments.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Bias in groundwater samples caused by wellbore flow |
| Series title | Journal of Hydraulic Engineering |
| Volume | 115 |
| Issue | 2 |
| Year Published | 1989 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Journal of Hydraulic Engineering |
| First page | 270 |
| Last page | 276 |
| Google Analytic Metrics | Metrics page |