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- Title
Characterization of non-Gaussian conductivities and porosities with hydraulic heads, solute concentrations, and water temperatures.
- Authors
Xu, Teng; Gómez-Hernández, J. Jaime
- Abstract
Reliable characterization of hydraulic parameters is important for the understanding of groundwater flow and solute transport. The normal-score ensemble Kalman filter (NS-EnKF) has proven to be an effective inverse method for the characterization of non-Gaussian hydraulic conductivities by assimilating transient piezometric head data, or solute concentration data. Groundwater temperature, an easily captured state variable, has not drawn much attention as an additional state variable useful for the characterization of aquifer parameters. In this work, we jointly estimate non-Gaussian aquifer parameters (hydraulic conductivities and porosities) by assimilating three kinds of state variables (piezometric head, solute concentration, and groundwater temperature) using the NS-EnKF. A synthetic example including seven tests is designed, and used to evaluate the ability to characterize hydraulic conductivity and porosity in a non-Gaussian setting by assimilating different numbers and types of state variables. The results show that characterization of aquifer parameters can be improved by assimilating groundwater temperature data and that the main patters of the non-Gaussian reference fields can be retrieved with more accuracy and higher precision if multiple state variables are assimilated.
- Subjects
GROUNDWATER temperature; KALMAN filtering; FLUID flow; HYDRAULIC structures; PIEZOMETERS
- Publication
Water Resources Research, 2016, Vol 52, Issue 8, p6111
- ISSN
0043-1397
- Publication type
Article
- DOI
10.1002/2016WR019011