. Hydrochemical, vegetational and microbiological effects of a natural and a constructed wetland on the control of acid mine drainage . Mine drainage; Acid mine drainage; Wetlands. variable head method modified from the hydrostatic time-lag method of Hvorslev (1951), as reviewed by Cedergren (1977), was used to calculate saturated field hydraulic conductivity. This method is based on the rate at which water rises or falls in a hole after a known volume (slug) has been removed or added. In the case of the auger holes a bailer was used to remove a volume of water and the rate of water rise was m
. Hydrochemical, vegetational and microbiological effects of a natural and a constructed wetland on the control of acid mine drainage . Mine drainage; Acid mine drainage; Wetlands. variable head method modified from the hydrostatic time-lag method of Hvorslev (1951), as reviewed by Cedergren (1977), was used to calculate saturated field hydraulic conductivity. This method is based on the rate at which water rises or falls in a hole after a known volume (slug) has been removed or added. In the case of the auger holes a bailer was used to remove a volume of water and the rate of water rise was measured using equipment designed similar to that described by Beers (1983). For the piezometers a volume of a solid steel rod was added and the rate of water fall was measured using an electric tape. I-Horizontal Not to Scale 2- Water Levels (WL) on 8/13/87 Auger Hole C-2-AH, Shallow Deep Well Well /0-2-S ,C-2-D r / Catotelm grey-black silt clay muck. *" ^ _ Top of Casing _ Deep Piezometric "shallow" Piezometric WL _ Ground Surface ^ Potentiometric WL Bentonite Seal ELEVATION feet/meters 5174 Gravel 2-5cm subrounded to angular Belt Fm- rocK fragments Sand Pock Screened or Open Interval 5173 5172 5I7J^ 5170 5169. 5168 5167 5166 5165. 5164 5163 5162^ 5I6J^ 5160 5159 5158 1522 1521 1520 1519 1518 Bedrock mineralized Belt Fm- Figure 5-5. Example of study site instrumentation and lithology. 39. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Montana State University (Bozeman, Mont. ). Reclamation Research Unit; Dollhopf, D. J; MSI Detoxification, Inc. [Bozeman, Mont. ? : Montana State Univ. ?]
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