Sediment Fabric and Anisotropy of Hydraulic Conductivity in Sandy Till, Wisconsin, U.S.A. | Zendy

Todd W. Rayne | Zendy; David M. Mickelson | Zendy

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Sediment Fabric and Anisotropy of Hydraulic Conductivity in Sandy Till, Wisconsin, U.S.A.

Author(s) -

Todd W. Rayne,

David M. Mickelson

Publication year - 1996

Publication title -

hydrology research

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.665

H-Index - 48

eISSN - 1996-9694

pISSN - 0029-1277

DOI - 10.2166/nh.1996.0002

Subject(s) - geology , anisotropy , cobble , silt , trench , hydraulic conductivity , drumlin , geotechnical engineering , sediment , pebble , winnowing , geomorphology , aquifer , loam , materials science , soil science , soil water , composite material , groundwater , optics , ecology , oceanography , sea ice , history , archaeology , biology , cryosphere , layer (electronics) , habitat , physics , ice stream

The orientation of macroscopic and microscopic particles in silty, sandy basal till appears to have little effect on aquifer anisotropy. The orientation of 108 elongate pebble and cobble-sized particles was measured in a trench adjacent to 25 wells screened in the till. In addition, the orientation of elongate silt and sand-sized particles was measured in thin sections of five oriented samples taken from the same trench. The orientations of the macro- and microfabric measurements agree with each other and with drumlin orientations in the vicinity. There is no preferential direction of transmissivity ( i.e . no horizontal anisotropy) based on analysis of pumping test data. This is most likely due to the relatively small number of elongated, and therefore oriented, particles in the matrix.

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