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Michael P. Maley, PE, PG, CHG, CEG

secure and reliable water supply. He developed and calibrated a MODFLOW model of the groundwater
basin to define sustainable yield, assess groundwater‐surface water interactions, and stormwater
recharge.

Conjunctive Use Project, Santa Cruz County Dept. of Health Services, Santa Cruz, CA
Mr. Maley used an existing MODFLOW/GSFLOW model to evaluate methods to mitigate declines in
groundwater levels in the project area to provide a more secure and reliable water supply. The project
evaluated a variety of approaches to off‐stream diversion of water to optimize utilization of flows to off‐
stream groundwater recharge ponds, in a manner that satisfies aquatic habitat preservation requirements
while fulfilling operational objectives.

Recycled Water Facility Plan, Pierce County, WA
Mr. Maley developed a groundwater model to evaluate the capacity of recycled water discharge to
shallow aquifer to determine volume, size and location of potential injection well and percolation ponds
alternatives. He evaluated impacts of groundwater mounding and interactions with salt water from Puget
Sound.

SELECTED PUBLICATIONS AND PRESENTATIONS
H. Victor Church Award – Best poster at 2001 Pacific Section AAPG/Cordilleran Section GSA Meeting
“Defining Hydrostratigraphic Units within the Heterogeneous Alluvial Sediments at Lawrence Livermore
National Laboratory”, Universal City, CA, April 2001 (Blake, R., C. Noyes, and M. Maley)
Maley, M., S. Itagaki, and T. Reynolds, 2016, “Development and Application of the Santa Margarita Basin
th
Groundwater Model, Scotts Valley, California”, Presentation at 25 GRA Annual Meeting, Concord, CA,
October 2016.
Onsoy, S., L. Chau, M. Maley, M. Baillie, L. Takaichi, and D. Marks, 2013, State Water Project Chloride
Modeling Analysis, Presentation at 2013 DWR Municipal Water Quality Program Annual Meeting,
Sacramento, CA, July 2013.

Maley, M., and J. Peters, 2012, “Hydrogeological Analysis for Developing Drought Contingency Plan,
st
Mendocino, California”, Presentation at 21 GRA Annual Meeting, Rohnert Park, CA, October 2012.
Maguire, S., M. Maley, M., and R. Swartz, 2011, “Water Quality Risks to the Long‐term Sustainability of

Groundwater in Northern Sacramento County”, Presentation at 28th Biennial Groundwater Conference/
th
20 GRA Annual Meeting, Sacramento, CA, October 2011.
McCraven, S., V. De La Piedra, G. Cook and M. Maley, 2009. “Groundwater Vulnerability Assessment in the

Santa Clara Valley.” Presentation at 27th Biennial Groundwater Conference/GRA Annual Meeting,
Sacramento, CA, October 2009.
Maley, M., and J. Peters, 2008. “Use of MODFLOW in Developing Drought Contingency Plan, Mendocino,
California.” Proceedings MODFLOW and More 2008 Conference, Golden, CO, (E. Poeter, M. Hill, and C.
Zheng, editors), International Ground Water Modeling Center, 5 p.
Maley, M., P. Leffler, P. Sorensen, M. Javaherian, and M. Pinto, 2003. “Water Balance and MODFLOW

Simulations for Cummings Basin, Kern County, California.” Presentation at 24th Biennial Groundwater
Conference/GRA Annual Meeting, Ontario, CA.

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