Photo of Alfonso Mejia

Alfonso Mejia

Associate Professor

Affiliation(s):

  • Civil and Environmental Engineering

215B Sackett Building

aim127@psu.edu

814-865-0639

Personal or Departmental Website

Research Areas:

Water Resources Engineering

Interest Areas:

Hydrology, floods and droughts, hydrometeorology, urban-water systems, water resources sustainability, ecohydrology

 
 

 

Education

  • BS, Civil and Environmental Engineering, University of Maryland, 1999
  • MS, Civil and Environmental Engineering, Colorado State University, 2006
  • Ph D, Civil and Environmental Engineering, University of Maryland, 2009

Publications

Book, Chapters

  • Y Guo, P Daeryong, A Mejia, J Gironas and L Roesner, 2017, Urban Hydrology: Probabilistic Models for Urban Stormwater Management, Chapter 9 in Probability Distribution Functions in Hydrology (ASCE monograph)
  • A Mejia, T. Jovanovic and S. Pavlovic, 2016, Orinoco River Basin, Chapter 95 in Handbook of Applied Hydrology, McGraw-Hill, New York, NY, pp. 95.1-95.5

Journal Articles

  • X. Yang, S. Sharma, R. Siddique, S. Greybush and A Mejia, 2017, "Postprocessing of GEFS reforecasts over the U.S. middle Atlantic region", Monthly Weather Review, 145, (5), pp. 1641–1658
  • C Ahams, Willa Paterson, S Garcia, R Rushforth, B Ruddell and A Mejia, 2017, "Water footprint of 65 mid- to large-sized U.S. cities and their metropolitan areas", Journal of the American Water Resources Association
  • H. Kreibich, T. Krueger, A. Van Loon, A. Mejia, J. Liu, H. McMillan and A. Castellarin, 2017, "Scientific debate of Panta Rhei research – how to advance our knowledge of changes in hydrology and society?", Hydrological Sciences Journal, 62, (3), pp. 331-333
  • S. Sharma, R. Siddique, N. Balderas, Jose D Fuentes, Seann Reed, Peter Ahnert, Robert Shedd, Brian Astifan, Reggina Cabrera, Arlene Laing, Mark Klein and A Mejia, 2017, "Eastern U.S. verification of precipitation forecasts", Weather and Forecasting, 32, (1), pp. 117–139
  • R. Siddique and A. Mejia, 2017, "Ensemble streamflow forecasting across the U.S. middle Atlantic region", Journal of Hydrometeorology, 18, (7), pp. 1905–1928
  • P. Sanzana, J. Gironas, I Braud, F Branger, F Rodriguez, X Vargas, N Hitschfeld, J F Munoz, S Vicuna, Alfonso Mejia and S Jankowfsky, 2017, "A GIS-based urban and peri-urban landscape representation toolbox for hydrological distributed modeling", Environmental Modeling and Software, 91, pp. 168–185
  • T. Jovanovic, S. García, H. Gall and A. Mejia, 2016, "Complexity as a streamflow metric of hydrologic alteration", Stochastic Environmental Research and Risk Assessment, pp. 1-13
  • H McMillan, A Montanari, C Cudennec, H Savenije, H Kreibich, T Krueger, J Liu, A Mejia, Anne Van Loon, H Aksoy, G Di Baldassarre, Y Huang, D Mazvimavi, M Rogger, B Sivakumar, T Bibikova, A Castellarin, Y Chen, D Finger, A Gelfan, D M Hannah, A Y Hoekstra, H Li, S Maskey, T Mathevet, A Mijic, A Pedrozo-Acuna, M J Polo, V Rosales, P Smith, A Viglione, V Srinivasan, E Toth, R van Nooyen and J Xia, 2016, "Panta Rhei 2013-2015: Global perspectives on hydrology, society and change", Hydrological Sciences Journal, 61, (7), pp. 1174-1191
  • S Pavlovic, S Perica, M. St Laurent and A Mejia, 2016, "Intercomparison of selected fixed area areal reduction factor methods", Journal of Hydrology, 537, pp. 419-430
  • T. Jovanovic, A. Mejia, H. Gall and J. Gironas, 2016, "Effect of urbanization on the long-term persistence of streamflow records", Physica A: Statistical Mechanics and its Applications, 447, pp. 208–221
  • W. Paterson, R. Rushforth, B. L Ruddell, M. Konar, I C Ahams, J. Gironas, A. Mijic and A. Mejia, 2015, "Water footprint of cities: A review and suggestions for future research", Sustainability, 7, (7), pp. 8461-8490
  • A Mejia, F Rossel, J Gironas and T Jovanovic, 2015, "Anthropogenic controls from urban growth on flow regimes", Advances in Water Resources, 84, pp. 125-135
  • R. Siddique, A. Mejia, J. Brown, S. Reed and P. Ahnert, 2015, "Verification of precipitation forecasts from two numerical weather prediction models in the middle Atlantic region of the USA: A precursory analysis to hydrologic forecasting", Journal of Hydrology, 529, (3), pp. 1390–1406
  • A Mejia, E Daly, F Rossel, T Jovanovic and J Gironas, 2014, "A stochastic model of streamflow for urbanized basins", Water Resources Research, 50, (3), pp. 1984–2001
  • F J Rossel, J Gironas, F Mejia, F Rodriguez and A Rinaldo, 2014, "Spatial characterization of catchment dispersion mechanisms in an urban context", Advances in Water Resources, 74, pp. 290-301
  • A I Mejia, 2013, "Assessment of hydrologic controls on the applicability of routing methods", Journal of Hydrologic Engineering, 18, (8), pp. 948-957
  • A I Mejia, 2013, "Scaling of the network instantaneous response function from basin geomorphology and hydraulic geometry", Journal of Hydrologic Engineering, 18, (12), pp. 1786-1789
  • A I Mejia and S M Reed, 2011, "Evaluating the effects of simplified routing and parameterized cross section shapes with a coupled distributed hydrologic and hydraulic model", Journal of Hydrology, 409, (1-2), pp. 512-524
  • A I Mejia and S M Reed, 2011, "Role of channel and floodplain cross-section geometry in the basin response", Water Resources Research, 47, (9), pp. 1-15
  • A I Mejia and G E Moglen, 2010, "Impact of the spatial distribution of imperviousness on the hydrologic response of an urbanizing basin", Hydrological Processes, 24, (23), pp. 3359–3373
  • A I Mejia and G E Moglen, 2010, "Spatial distribution of imperviousness and the space-time variability of rainfall, runoff generation, and routing", Water Resources Research, 46, (7), pp. 1-14
  • A I Mejia and G E Moglen, 2009, "Spatial patterns of urban development from optimization of flood peaks and imperviousness-based measures", Journal of Hydrologic Engineering, 14, (4), pp. 416-424
  • A I Mejia and J D Niemann, 2008, "Identification and characterization of dendritic, parallel, pinnate, trellis, and rectangular drainage networks based on deviations from planform self-similarity", Journal of Geophysical Research, 113, (F2), pp. 1-21

Research Projects

  • September 2016 - August 2020, "INFEWS/T1: Mesoscale Data Fusion to Map and Model the U.S. FEW system (INFEWSion)," (Sponsor: Northern Arizona University).
  • April 2018 - March 2019, "Projecting Flood Risk from Extreme Precipitation: Interaction Between Climate Change and Urbanization," (Sponsor: Penn State Institutes of Energy and the Environment).
  • April 2018 - March 2019, "Data-Driven Flood Risk from Extreme Precipitation," (Sponsor: Penn State Institute for CyberScience).
  • September 2016 - September 2019, "INFEWS/T1: Mesoscale Data Fusion to Map and Model the U.S. FEW system (INFEWSion)," (Sponsor: NSF).
  • May 2017 - May 2018, "Data-driven identification and characterization of community structure in the U.S. economic commodities-water network," (Sponsor: Penn State Institute of Cyberscience 2017 Seed Grant Program).
  • May 2014 - April 2018, "Understanding and improving the full hydrometeorological forecasting chain using multimodel ensembles," (Sponsor: NOAA).
  • March 2017 - June 2018, "Development of Non-Stationary Methods for Addressing Climate Change Effects on NOAA Atlas 14 Precipitation Frequency Estimates," (Sponsor: University Corporation for Atmospheric Research).
  • May 2017 - August 2018, "Toward Improved Predictability of Subseasonal to Seasonal Streamflow in Pennsylvania," (Sponsor: Pennsylvania Water Resources Research Center).
  • May 2014 - April 2017, "Understanding and Improving the Full Hydrometeorological Forecasting Chain Using Multimodel Ensembles," (Sponsor: National Oceanic and Atmospheric Administration).
  • December 2015 - August 2017, "Development of non-stationary methods for addressing climate change effects on NOAA Atlas 14 precipitation frequency estimates," (Sponsor: UCAR COMET).
  • January 2017 - December 2017, "Development and evaluation of a statistical model for non-stationary precipitation frequency estimates with NOAA Atlas 14," (Sponsor: UCAR).
  • May 2015 - May 2016, "Water footprint of US cities," (Sponsor: Penn State Seed Grant Program).
  • May 2016 - August 2016, "Development of non-stationary methods for addressing climate change effects on NOAA Atlas 14 precipitation frequency estimates," (Sponsor: University Corporation for Atmospheric Research).
  • January 2013 - March 2014, "Probabilistic characterization of streamflows in urbanizing basins in Pennsylvania under climate change scenarios," (Sponsor: Pennsylvania Sea Grant).

Honors and Awards

  • 2015 Best Technical Note Award, Journal of Hydrologic Engineering, ASCE, May 2015
  • Post-Doctoral Fellowship, NRC, July 2009 - December 2010
  • AGEP Fellowship, NSF, June 2005
  • Borland Academic Scholarship, Colorado State University, August 2004
  • Outstanding Civil Engineering Senior Award, University of Maryland, May 1999
  • Excellence Award for Minorities in Engineering, University of Maryland, May 1996 - May 1999
  • Clark Academic Scholarship, University of Maryland, August 1997

Service

Service to Penn State:

  • Committee Work, Member, CEE Graduate Committee, August 2017
  • Committee Work, Member, CEE Water Resources Faculty Search Committee, September 2015 - March 2017
  • Participation in Recruitment and Retention Activities, Reviewer, Penn State, Research Experiences for Undergraduates in Climate Science, 2015
  • Administrative Support Work, Associate Director, Penn State Center for Advanced Data Assimilation and Predictability Techniques, ADAPT, October 2014
  • Participation in Recruitment and Retention Activities, Reviewer, Penn State College of Engineering, Research Opportunities for Undergraduates, 2014
  • Participation in Recruitment and Retention Activities, Reviewer, Penn State College of Engineering 2014 STEM Open House, March 2014 - March 2014
  • Participation in Recruitment and Retention Activities, Judge, Penn State, 29th Annual Graduate Exhibition, April 2014 - April 2014
  • Committee Work, Member, CEE Graduate Committee, August 2013 - August 2015
  • Committee Work, Member, CEE Web Committee, August 2012 - May 2013

Service to External Organizations:

  • Organizing Conferences and Service on Conference Committees, Chairperson, ASCE-Environmental & Water Resources Institute, World Environmental and Water Resources Congress, Minneapolis, MN, May 2018 - May 2018
  • Organizing Conferences and Service on Conference Committees, Co-Chairperson, ASCE-Environmental & Water Resources Institute, World Environmental and Water Resources Congress, Minneapolis, MN, May 2018 - May 2018
  • Organizing Conferences and Service on Conference Committees, Co-Chairperson, ASCE-Environmental & Water Resources Institute, World Environmental and Water Resources Congress, Austin, TX, May 2017 - May 2017
  • Participation in or Service to Professional and Learned Societies, Chairperson, Environmental & Water Resources Institute of the American Society of Civil Engineers, June 2017
  • Organizing Conferences and Service on Conference Committees, Chairperson, Fall 2016 AGU Meeting, San Francisco, CA, December 2016 - December 2016
  • Organizing Conferences and Service on Conference Committees, Co-Chairperson, Fall 2016 AGU Meeting, San Francisco, CA, December 2016 - December 2016
  • Organizing Conferences and Service on Conference Committees, Co-Chairperson, ASCE-Environmental & Water Resources Institute, World Environmental and Water Resources Congress, Austin, TX, May 2016 - May 2016
  • Organizing Conferences and Service on Conference Committees, Co-Chairperson, Fall 2015 AGU Meeting, San Francisco, CA, December 2015 - December 2015
  • Participation in or Service to Professional and Learned Societies, Chairperson, Panta Rhei Research Initiative, International Association of Hydrological Sciences, June 2015 - July 2017
  • Participation in or Service to Professional and Learned Societies, Chairperson, Panta Rhei Research Initiative, International Association of Hydrological Sciences, February 2014
  • Participation in or Service to Professional and Learned Societies, Chairperson, Panta Rhei Research Initiative, International Association of Hydrological Sciences, February 2014
  • Organizing Conferences and Service on Conference Committees, Chairperson, Fall 2014 AGU Meeting, San Francisco, CA, December 2014 - December 2014
  • Organizing Conferences and Service on Conference Committees, Co-Chairperson, HIC 2014, 11th International Conference on Hydroinformatics, New York, NY, August 2014 - August 2014
  • Organizing Conferences and Service on Conference Committees, Chairperson, ASCE-Environmental & Water Resources Institute, World Environmental and Water Resources Congress, Austin, TX, May 2014 - May 2014
  • Participation in or Service to Professional and Learned Societies, Co-Chairperson, Environmental & Water Resources Institute of the American Society of Civil Engineers, August 2013 - May 2017
  • Participation in or Service to Professional and Learned Societies, Member, Environmental & Water Resources Institute of the American Society of Civil Engineers, August 2013
 


 

About

The Penn State Civil and Environmental Engineering Department, established in 1881, is internationally recognized for excellence in the preparation of undergraduate and graduate engineers through the integration of education, research, and leadership.

Department of Civil & Environmental Engineering

212 Sackett Building

The Pennsylvania State University

University Park, PA 16802-1408

Phone: 814-863-3084