HR: 16:15h
AN: H14C-02 INVITED     [Abstracts]
TI: Using Data Collected At Different Scales To Constrain Model Parameters
AU: * Beckie, R
EM: rbeckie@eos.ubc.ca
AF: Department of Earth and Ocean Sciences University of British Columbia, 6339 Stores Road, Vancouver, BC V6T 1Z4 Canada
AU: Harvey, C F
EM: charvey@mit.edu
AF: Department of Civil and Environmental Engineering MIT, Building 48 Rm 321, Cambridge, MA 02139 United States
AU: Zawadzki, W
EM: Willy_Zawadzki@golder.com
AF: Golder Associates, 500 - 4260 Still Creek Drive, Burnaby, BC V5C 6C6 Canada
AU: Clayton, E A
EM: eclayton@slb.com
AF: Schlumberger Water Services, 980 Ninth Street, Suite 1480 , Sacramento, CA 95814 United States
AB: Models of heterogeneous natural systems are intrinsically scale dependent: as the model resolution changes the model parameters or the entire model structure changes. This presents a challenge for characterization and model parameterization when data from tools or instruments with different resolutions are employed at a site. We present three methods to relate quantities measured on different scales to each other. Typically, these methods are based upon some kind of averaging recipe that describes how smaller-scale information is to be processed into larger-scale data. These relationships can be derived if the mechanics of the measurement process are known. We illustrate these approaches for the case of the slug test and pumping test. The mechanics of many geophysical measurements are, however, not simple and often depend upon factors that are not easily quantified in a mechanistic model. Relationships between different measurements can then be determined empirically through experiments that are best treated in a probabilistic context. Finally, we discuss the relative worth of data on different scales and how these relationships can be used to constrain model parameters in formal inverse procedures, or be used in forward modeling.
DE: 1829 Groundwater hydrology
DE: 1894 Instruments and techniques
SC: Hydrology [H]
MN: 2004 AGU Fall Meeting