Fractured rock aquifer tests in the Western Siberian Basin, Ozyorsk, Russia
- and others
A series of multi-zone pumping tests was conducted in a contaminated fractured rock aquifer in the Western Siberian Basin, Ozyorsk, Russia. The tests were conducted adjacent to the Mishelyak River floodplain in fractured Paleozoic porphyrites, tufts, tuff breccia, and lava typical of the Ural mountain complex. Geophysical logs, borehole photography, core samples, and results from previous borehole contamination studies were used to identify the zones to be tested. A network of three uncased wells was tested using a system of inflatable packers, pressure transducers and data loggers. Seven zones were isolated and monitored in two of the uncased wells. A straddle packer assembly was used to isolate individual zones within the pumping well. Eight constant rate pumping tests were conducted. Results of the testing indicate that shallow groundwater migrates primarily in two intervals that are separated by an interval with low lateral conductivity. The water bearing intervals have moderate to high specific capacities (1.3 and 30 L/min/m). Several processes are responsible for fracturing present in the lower interval. The network of compound fractures produced a complex array of fracture intersections yielding a fractured media with hydraulic behavior similar to porous media. Models used for the analysis of pumping tests in porous media provide a good estimation of the hydraulic response of the lower interval to pumping. Future work will include more complex analysis of the data to determine hydraulic conductivity ellipses.
- Research Organization:
- Savannah River Site (SRS), Aiken, SC (United States)
- Sponsoring Organization:
- USDOE Office of Environmental Restoration and Waste Management, Washington, DC (United States); Russian Atomic Energy Commission, Moscow (Russian Federation)
- DOE Contract Number:
- AC09-96SR18500
- OSTI ID:
- 570132
- Report Number(s):
- WSRC-MS-97-0576; CONF-971198-; ON: DE97054318; TRN: 98:003836
- Resource Relation:
- Conference: 1997 American Institute of Hydrology annual meeting, Tampa, FL (United States), 16-19 Nov 1997; Other Information: PBD: 1997
- Country of Publication:
- United States
- Language:
- English
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