USGS - science for a changing world

Water Science for Maryland, Delaware and the District of Columbia

Betzaida Reyes, Physical Scientist

Contact Information
U.S. Geological Survey
1289 McD Drive
Dover, Delaware 19901

Phone:  (302) 734-2506 x244
Fax:      (302) 734-2964


M.S. in Epidemiology and Biostatistics Sciences, University of Puerto Rico, Medical Science Campus, 2000.

Transitory Studies
Biology Graduated School, University of Puerto Rico, Rio Piedras Campus, 1995.

B.S. in General Science (Minor in Chemistry), , 1994.

Professional Experience

2003 To Present - Physical Scientist in the MD-DE-DC Water Science Center

2001-2002 - Cartographer in USDA, International Institute of Tropical Forestry

1995-2001, 2002-2003 - Physical Scientist in the Caribbean Water Science Center

Research / Professional Focus / Current Projects

Project Chief of the Delaware Natural and Environmental Resources Drinking Water project (field work schedules, recon., lab data tracking and statistical analysis; currently in report writing process) 2008 to present.

Project Chief of the Town of Ocean City project (data management and analysis, 2007 Data report) 2006 to 2007

Geographic Information System (GIS) analyst: used for research and as a WSC support in a variety of Projects.

Physical scientist for the Potomac River Basin and Delmarva Peninsula National Water Quality Assessment program (PODL NAWQA) for the MD-DE-DC Water Science Center. Geographic Information Sciences applied and spatial data analysis to the extent for the NAWQA activities, focused to provide consistent and reliable information on the quality of, identifying changes over time, and understanding interacting natural and human influences on observed status and trends in streams, groundwater, and aquatic ecology in the PODL study unit.

Extensive experience in many aspects in the Geographic Information Sciences including, but not limited to, remote sensing, application of regression models to spatial data sets, landscape, LiDAR, water-quality and water-use analysis, Census data, groundwater and surface water data, and other statistical data analysis

Creation and management of geographic information databases including but not limited to cartographic, geographic, Counties metered water-use, Census data for the development of the Maryland BRAC Per-capita WU Domestic Regression equations.

Statistical skills, SAS and S-Plus programming knowledge applied for models development, technical assistance, and QA/QC analysis in the WSC.

Data/technical report prep., maps, plots, and illustrations following USGS guidelines for hydrology and hydrogeology applications and related sciences. Contours and HUCs delineation/coding, flood and bathymetric contoured maps, biological and health issues, QA/QC and metadata development.

Selected Bibliography

Banks, W.S.L., and Reyes, B., 2009, Anthropogenic organic compounds in source and finished groundwater of community water systems in the Piedmont Physiographic Province, Potomac River Basin, Maryland and Virginia, 2003-04: U.S. Geological Survey Scientific Investigations Report 2009-5064, 33 p.

Barlow, R.A., Nardi, M.R., and Reyes, Betzaida, 2008, Use of light detection and ranging (LiDAR) to obtain high-resolution elevation data for Sussex County, Delaware: U.S. Geological Survey Fact Sheet 2008-3088, 6 p.

Ator, S. W. and Reyes, B., Pesticides in Groundwater of Central and Western Maryland: U.S. Geological Survey Fact Sheet 2008-3068, 6p.

Koterba, M. T. , Andres A. S. (Delaware Geological Survey), Vrabel, J., Crilley, D. M. , Szabo, Z., DeWild, J. F. , Aiken, G. R. , and Reyes-Padro, B., Occurrence and Distribution of Mercury in the Surficial Aquifer, Long Neck Peninsula, Sussex County, Delaware, 2003-04 175p.

2007 Town of Ocean City, Maryland, Groundwater Monitoring data report, 2006-2007 82p.

NAWQA PODL Web Page for the MD-DE-DC Water Science Center (

Graduate Statistical Assistant, Department of Biostatistics and Epidemiology, UPR, Medical Science Campus, Puerto Rico, 2000-2001. M.S. Thesis completed addressing Depressing symptomatology in Ulcerative Colitis patients registered in the Gastrointestinal Inflammatory Registry, Hospital Universitario from the Medical Science Campus in Puerto Rico.

Laboratory Technical assistant in Mercury research (student trainer and research assistant), UPR, Rio Piedras Campus, 1991-1992. Utilization of Mercury detector with hair sample solutions with Nitric Acid in a point source contaminated community from the north area of Puerto Rico.

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