Research
Hydrogeology
Flow in multi-layered aquifer-aquitard syatems; General leakage theory for subsurface systems including unconfined aquifers; Slug test analysis for unconfined aquifers; Nonlinear treatment of wellbore storage effects; Moment equations for flow in randomly heterogeneous media; Development of approximate solutions; Inverse stochastic moment analysis of transient flow;
Hydrogeophysics
Application of transient streaming potentials to aquifer characterization;
Development of analytical solutions for transient streaming potentials associated with flow in pumped aquifers;
Groundwater-surface water interactions
Development of analytical solutions relating ET to diurnal head fluctuations in saturated zone; River interactions with groundwater; Groundwater usage by phreatophyte vegetation; Impact of groundwater usage of riparian zone vegetation.
Hydrogeology in developing countries
Development of groundwater flow codes for research capacity building at universities in developing countries.
Coding most published analytical groundwater flow solutions; Emphasis on portability; Codes for use by students without access to such powerful programing tools as MATLAB, Visual Numerics, etc.
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Selected Publications
- Malama, B., Kuhlman, K. L. and Revil, A. (2009) Theory of transient streaming potentials associated with axial-symmetric flow in unconfined aquifers, Geophysical Journal International, doi:10.1111/j.1365-246X.2009.04336.x (in press)
- Riva, M., Guadagnini, A., Neuman, S.P., Janetti, E.B. and Malama, B. (2009) Inverse analysis of stochastic moment equations for transient flow in randomly heterogeneous media, Advances in Water Resources (accepted)
- Malama, B. and Barrash, W. (2009) Flow in the neighborhood of a confined aquifer observation well, J. of Hydrol., 364(6),107-114, doi:10.1016/j.jhydrol.2008.10.014 pdf
- Malama, B., Revil, A. and Kuhlman, K. L. (2009) A semi-analytical solution for transient streaming potentials associated with confined aquifer pumping tests, Geophysical Journal International, 176, 1007-1016, doi: 10.1111/j.1365-246X.2008.04014.x pdf
- Cardiff, M., Barrash, W., Kitanidis, P.K., Malama, B., Revil, A., Straface, Rizzo, E. (2009) A potential-based inversion of unconfined steady-state hydraulic tomography, Ground Water, 47(2), 259-270, doi:10.1111/j.1745-6584.2008.00541.x
- Jardani, A., Revil, A., Barrash, W., Crespy, A., Rizzo, E., Straface, S., Cardiff, M., Malama, B., Miller, C., and Johnson, T. (2009) Reconstruction of the Water Table from Self-Potential Data: A Bayesian Approach, Ground Water, doi:10.1111/j.1745-6584.2008.00513.x
- Malama, B., Kuhlman, K. L. and Barrash, W. (2008) Semi-analytical solution for flow in a leaky unconfined aquifer toward a partially penetrating pumping well, J. of Hydrol., doi:10.1016/j.jhydrol.2007.08.018 pdf
- Malama, B., Kuhlman, K. L. and Barrash, W. (2007) Semi-analytical solution for flow in leaky unconfined aquifer-aquitard systems, J. of Hydrol., doi:10.1016/j.jhydrol.2007.08.018 pdf
- Jardani, A., Revil, A., Bolève, A., Crespy, A., Dupont, J-P., Barrash, W. and Malama, B. (2007) Tomography of the Darcy velocity from self-potential measurements, Geophysical Research Letters, 34, L24403, doi:10.1029/2007GL031907.
- Kulatilake, P.H.S.W., Park, J. and Malama, B. (2006) A new rock mass failure criterion for biaxial loading conditions Geotechnical and Geological Engineering, Volume 24 (4), pp. 871-888
- Malama, B., Kulatilake, P.H.S.W., (2003) Models for normal fracture deformation under compressive loading, International Journal of Rock Mechanics and Mining Sciences, Vol. 40, (6), p. 893-901 pdf
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