Page 69 - Yucaipa Sustainable Groundwater Management Agency - Yucaipa SGMA

Leo Liu, EIT

Years of Experience: 5
Years with GEOSCIENCE: 4
Education:
BS, Environmental Engineering, Tianjin Institute of Urban Construction, China
MS, Environmental Engineering, University of Southern California
Professional Registrations:
Engineer-in-Training

What Leo Brings to the Project:
• Experience supporting groundwater models, sustainable yield studies, and calculating water budgets—
help provide more accurate and thorough models and studies to inform options to improve basin
sustainability
Leo has more than five years of experience with ground water and environmental investigations
performed for numerous municipalities, state agencies, and private clients throughout California. He
routinely performs ground water flow and solute transport modeling, hydrogeologic investigations,
ground water basin and water quality studies, watershed modeling and management, artificial recharge
projects, and has experience in GIS applications, database development and management, and well
design.
Selected Project Experience:

San Bernardino Valley Municipal Water District: Santa Ana River Integrated Model - Leo is supporting
efforts to use existing groundwater and surface water models to develop an integrated watershed
model for the upper Santa Ana River. The resulting Upper SAR Integrated Model (or Integrated SAR
Model), will be used to determine what factors may contribute to declines SAR flows, and assess
cumulative effects on SAR surface flows and groundwater levels.

San Bernardino Valley Municipal Water District: Yucaipa Groundwater Basin Annual Storage Change
Calculation - Leo measured ground water level and collected pumping, spreading data, and
climatological data annually. He also digitized water level data from 2005 to 2013 for the Yucaipa area
using GIS software. Leo then used groundwater elevation contours from each year to calculate
groundwater storage capacity.

City of San Bernardino: US EPA Model - Leo prepared the SBBA HSPF watershed model input data
including land use, channel type and evapotranspiration data and run model.
San Bernardino Valley Municipal Water District: Rialto Colton Model - Leo collected and digitized water
data from 1945, and 2011 using GIS software. He calculated the water budget including underflow from
Lytle Basin, underflow from Bunker Hill Basin, artificial recharge of imported water, ungaged runoff and
subsurface inflow from the San Gabriel Mountains and Badlands, stream bed percolation from the Santa
Ana River and Warm Creek, groundwater pumping, and evapotranspiration.

Yucaipa Sustainable Groundwater Management Agency - August 9, 2018 - Page 68 of 208