A new method for conditioning stochastic groundwater flow models in fractured media
Milne, Andrew and Cliffe, Andrew and Holton, David and Houston, Paul and Jackson, C. Peter and Joyce, Steve (2010) A new method for conditioning stochastic groundwater flow models in fractured media. Advances in Water Resources . ISSN 0309-1708 (Submitted)
Many geological formations consist of crystalline rocks that have very low matrix permeability but allow flow through an interconnected network of fractures. Understanding the flow of groundwater through such rocks is important in considering disposal of radioactive waste in underground repositories. A specific area of interest is the conditioning of fracture transmissivities on measured values of pressure in these formations. This is the process where the values of fracture transmissivities in a model are adjusted to obtain a good fit of the calculated pressures to measured pressure values. While there are existing methods to condition transmissivity fields on transmissivity, pressure and flow measurements for a continuous porous medium there is little literature on conditioning fracture networks. Conditioning fracture transmissivities on pressure or flow values is a complex problem because the measurements are not linearly related to the fracture transmissivities and they are also dependent on all the fracture transmissivities in the network.
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