EPA Science Inventory

DEVELOPMENT AND APPLICATION OF BOREHOLE FLOWMETERS FOR ENVIRONMENTAL ASSESSMENT

Citation:

Molz, F. J. AND S. C. Young. DEVELOPMENT AND APPLICATION OF BOREHOLE FLOWMETERS FOR ENVIRONMENTAL ASSESSMENT. LOG ANALYST January-February:13-23, (1993).

Description:

In order to understand the origin of contaminant plumes and infer their future migration, one requires a knowledge of the hydraulic conductivity (K) distribution. n many aquifers, the borehole flowmeter offers the most direct technique available for developing a log of hydraulic conductivity in the horizontal direction. ew electromagnetic flowmeter developed by the Tennessee Valley Authority (TVA) is based on Faraday's law and produces a voltage that is proportional to the velocity of the water passing through the central cylindrical channel of the meter. he threshold velocity of a prototype instrument is less than 8.8 +/- 0.9 cm/min. alculation of a K distribution (granular aquifer) or flowpath distribution (fracture flow) based on flowmeter data is a straightforward process as described herein. pplications of both-spinner and electromagnetic flowmeters to granular and fractured-rock aquifers are described. esults indicate the electromagnetic meter is capable of supplying a new level of detail concerning the K distribution in granular aquifers and flowpath delineation in fractured-rock aquifers. Reprint available at NTIS. PB93185817, EPA/600/J-93/134.

Purpose/Objective:

To inform public.

URLs/Downloads:

Record Details:

Record Type: DOCUMENT (JOURNAL/PEER REVIEWED JOURNAL)
Start Date: 01/01/1993
Completion Date: 01/01/1993
Record Last Revised: 03/04/2009
Record Created: 12/08/2004
Record Released: 04/02/2005
OMB Category: Other
Record ID: 129073

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL RISK MANAGEMENT RESEARCH LABORATORY

SUBSURFACE PROTECTION AND REMEDIATION DIVISION

TECHNICAL ASSISTANCE AND TECHNOLOGY TRANSFER BRANCH