Evaluation and Remediation of Low Permeability and Dual by Martin N. Sara, Lorne G. Everett, Symposium on Evaluation

By Martin N. Sara, Lorne G. Everett, Symposium on Evaluation and Remediation of Low Permeability and Dual p

This specific book offers a world point of view on the most complicated concerns in hydrology: box and laboratory size of low permeability and twin porosity fabrics. 11 peer-reviewed papers, written by means of a world crew of specialists, concentrate on the advance of options to guage hydraulic conductivity and remediation of excellent grained and twin porosity geologic fabrics. themes tackle: try tactics; Laboratory and box reviews; and coffee Permeability Environments and Remediation matters.

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Extra resources for Evaluation and Remediation of Low Permeability and Dual Porosity Environments

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The slug test was performed in accordance with procedures described in ASTM Standard Test Method for Field Procedure for Instantaneous Change in Head (Slug) Tests for Determining Hydraulic Properties ofAquifiers (D 4044). A slug of water 1-m long was manually removed from the well. The rate at which the water level returned to equilibrium was measured using a pressure transducer and a datalogger. e. 1 m), Ho is initial head, and Ht is the head at time t. Herzog (1994) shows that the Bouwer and Rice method yields hydraulic conductivities similar to those computed with other common methods when applied to data from less conductive units, such as unfractured and fractured tills.

6 3-26-99 . . . . . 7m . 9 m . 5 m . . . No data . 2-15-96 2-18-96 2-17-96 . . 2-17-96 . . . . Spring 1998 Spring 1999 12-29-96 2-5-98 . . 1-6-97 2-10-98 1-1-97 2-13-98 1 - 1 - 9 7 2-13-98 . . 1-1-97 ** . . . . . IRC-5 Winter 96-97 . . . 6 m . . . . Depth Spring 1999 -3-1-99 3-2-99 2-28-99 3-3-99 3-3-99 ** . . 4 m bls, occurred more slowly. 1 m/d). The sedimentary interbed may have behaved as a capillary barrier retarding the advance of the infiltration front through the profile.

The borehole annular space was back-filled using the method described by Cassel and Klute (1986). 3 to 1 meter layer o f dry silt loam (-400 cm water potential from surficial sediments) was placed adjacent to the porous cups on the tensiometers to hydraulically connect the porous cup to the fractured basalt. 3 m thick were placed above and beneath the loam-filled monitoring depths to isolate the monitoring intervals. 8 mm, filled the remainder of the borehole annulus, except for thin layers of bentonite placed about every 2 m to inhibit channeling.

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