Guido Andres Yactayo


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Guido Andres Yactayo

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Guido Andres Yactayo
Watershed Data Modeling Specialist

Chesapeake Bay Program Office

410 Severn Avenue
Suite 109
Annapolis, MD 21403

Phone: (410) 295-1317
Cell: (540) 257-3485
Fax: (410) 267-5777

Guido Andres Yactayo Integration and Application Network Guido Andres Yactayo Watershed Data Modeling Specialist Guido Andres Yactayo Photo cell(540) 257-3485 workfax(410) 267-5777 work(410) 295-1317 Chesapeake Bay Program Office
410 Severn Avenue Suite 109
Annapolis MD 21403 USA


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NameGuido Andres Yactayo


2009M.S. Biological Systems Engineering, Virginia Polytechnic Institute and State University (Virginia Tech), Blacksburg, VA
Thesis: "A Modeling Framework to Evaluate the Fate of Nitrogen in a Karst-influenced Watershed"
2003B.Sc. Environmental and Natural Resource Engineering, Universidad Nacional del Callao, Perú
Specialization: environmental and natural resource engineering


GIS software: ArcView 3.2, Arc GIS 9.2, ARC/INFO, GPS systems
Remote Sensing software: ERDAS image, ENVI
Statistical software: MINITAB, R
Computer languages: Fortran
Languages: Spanish


Watershed Data Modeling Specialist, University of Maryland Center for Environmental Science – Chesapeake Bay Program Office.

Annapolis, MD, September  2009 – present

  • Update Scenario Builder subroutines and databases.
  • Develop Chesapeake Bay Watershed model subroutines to post-process input and outputs.
  • Perform GIS and statistical analysis of the Chesapeake Bay Watershed model input and output.
  • Conduct literature reviews and model documentation.

Research Assistant, Biological Systems Engineering Department, Virginia Tech

Blacksburg, VA, September 2007 – August 2009

  • Develop and evaluate a model for the karst-influenced Opequon Creek watershed
  • Develop data for characterizing nutrient loads from Opequon Creek watershed
  • Develop GIS database for Opequon Creek project and watershed modeling studies for watersheds in Ecuador

Research Assistant, International Potato Center, Natural Resource Management Division

Lima-Peru, October 2004 – June 2007

  • Assessed the environmental sustainability of using different crops in different zones using geospatial analysis and watershed modeling in Chiriqui Viejo watershed, Panama
  • Evaluated the spectral response of Vicia faba, potato, and sweet potato crops to calculate leaf area index and biomass production
  • Participated in the Natural Resources Management in the Sierra South Project (MARENASS) evaluating the impact of soil conservation and water management in the department of Apurimac, Perú
  • Participated as facilitator in the workshop Methods and Instruments of Analysis for Management of Natural Resources in the framework of the Regional Project of Andean Watersheds GTZS/ CONDESAN
  • Traveled to field sites and collected primary and secondary data and information

Internship, International Potato Center, Natural Resource Management Division

Lima Peru, February 2002 – May 2003

  • Performed the analysis of sediment samples of runoff plots
  • Examined the spectral response of ten tropical pasture varieties using remote sensing to calculate leaf area and biomass production
  • Digitized maps and used geographical information systems