Illinois State Archaeological Survey Calendar

Illinois State Archaeological Survey Calendar

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Event Detail Information

Event Detail Information

ISGS - Geostatistical Approaches to Characterizing the Hydrogeology of Glacial Drift

Speaker

John J. Quinn Environmental Science Division, Argonne National Laboratory

Date Oct 21, 2013
Time 11:00 am  
Location

Room 101, Natural Resources Building 615 E. Peabody Drive, Champaign

Cost

Free

Sponsor

Illinois State Geological Survey

Contact

Yu-Feng Lin

Event type Seminar
Views 411

Geostatistical methods provide a means for exploring that correlation structure, allowing comparisons of results from different geomorphological settings and approaches. In this study, indicator geostatistics and transition probability geostatistics are applied to nearly 300 km of drilling data derived from over 11,000 private well drilling logs and over 200 high-quality well logs from monitoring well installation. Analyses are focused on a 12,000-km2 region in central Minnesota in a setting dominated by the late-Wisconsinan Rainy, Superior, and Wadena lobes.

Results for the numerous geomorphological settings indicate overlapping geostatistical ranges, sills, and vertical lens thicknesses. A lack of stationarity was observed, consistent with a fundamental complexity of glacial depositional and erosional processes. Correlation generally varied as much between geographically distinct zones of like geomorphology as it did between zones of different geomorphology. High-resolution data associated with monitoring well installation typically deviated from the private well data; this is attributed to site-specific geology and detailed logging of thin units. Overall results underscore the difficulty in correlative assumptions in glaciated regions.

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Illinois State Archaeological Survey

23 E. Stadium Drive
209 Nuclear Physics Lab
Champaign, IL 61820
phone: 217-244-4244 | fax: 217-244-7458
isas@illinois.edu

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