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Mark Hanna, PhD, PE, LEED


Watershed and Stormwater Management

Water and Natural Resources Conservation and Restoration

Surface Water/Groundwater Supply Studies and Development


Ph.D., Civil Engineering, University of California, Los Angeles, 2004

M.S., Civil Engineering, University of California, Los Angeles, 1999

B.S., Civil Engineering, University of Colorado, Boulder, 1995

Primary Disciplines:
Civil Engineering, Natural Resources & Ecological Sciences, Water Resources Engineering,

Mark Hanna, Ph.D., P.E., LEED AP, is a principal water resources engineer based in California with 20 years of experience in water resources management. His experience in water rights, integrated water resources, and environmental restoration planning and implementation allows him to offer clients comprehensive solutions to the growing problems of water supply and demand in the natural and man-made environment.

Mark specializes in surface water and groundwater interactions, hydrology and large system hydraulics, and ecosystem restoration. He also has extensive experience in water resources development, surface water management, watershed planning, permitting, funding, water quality management planning, multi-beneficial project development, and water conservation. In particular, his practice focuses on three critical water resource areas: local water resource development for communities across Southern California; long-term restoration and revitalization projects related to large urban waterways, such as the Los Angeles River; and challenges related to importing water from the San Francisco-Sacramento Bay Delta and the Owens Valley in California’s Eastern Sierras.

Mark currently directs several integrated water resource projects for the firm in Los Angeles County, including the design and development of Metabolic Studio's Los Angeles River Water Wheel, a 72-foot water wheel designed to lift 106 acre-feet of water per year from the Los Angeles River for beneficial use. He also directs the development of a stormwater capture master plan for the Los Angeles Department of Water and Power, which will assist the City of Los Angeles in realizing the potential for stormwater to offset future demands. Mark also consults on the redevelopment of several large parcels along the Los Angeles River, including the Piggyback Yard and the Aliso Creek Confluence Park, for which the firm provides services to The Trust for Public Land. He also directs diverse technical teams developing plans and projects for stormwater management.

One of Mark's first initiatives at Geosyntec was to perform a “stormwater as a water supply” feasibility study for the Water Replenishment District of Southern California, leveraging water quality requirements with water supply needs and ultimately resulting in the development, funding, and design of the Broadway Neighborhood Greenway Project. This project will provide treatment for stormwater pollutants within 30 acres of highly urbanized land in Los Angeles while also contributing 40 acre-feet per year to the region’s local water portfolio.

Mark was recognized by the City of Los Angeles’ Board of Public Works as playing a “vital role” in the City’s Green Streets initiative and was one of the primary authors of the Council for Watershed Health’s “Water Augmentation Study – Research, Strategy, and Implementation Report,” finalized in 2010.

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