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Staff information


Mohamad Hejazi

Integrated Human-Earth SS Team


Mohamad Hejazi is a research scientist with the Joint Global Change Research Institute (JGCRI) and the Pacific Northwest National Laboratory. He holds a Ph.D. (2009) from the University of Illinois at Urbana-Champaign, and a B.S. (2002) and M.S. (2004) degrees from the University of Maryland, College Park. His research interests include: global hydrologic modeling, global and regional sectoral water demand models, separating the effect of climate change, human activities, and climate policies on hydrology, and the value of information (e.g. weather and climate forecasts) to human decisions (e.g., farmers, reservoir operators). Prior to joining JGCRI-PNNL, he worked as a postdoctoral research associate at the University of Illinois Urbana-Champaign and as a research assistant at the USGS and the Illinois Water Survey.

PNNL Publications


  • Li X, CR Vernon, MI Hejazi, RP Link, Z Huang, L Liu, and L Feng. 2018. "Tethys – A Python Package for Spatial and Temporal Downscaling of Global Water Withdrawals"." Journal of Open Research Software 6(1):9.  doi:10.5334/jors.197
  • Liu Y, MI Hejazi, H Li, X Zhang, and G Leng. 2018. "A Hydrological Emulator for Global Applications - HE v1.0.0." Geoscientific Model Development 11(3):1077-1092.  doi:10.5194/gmd-11-1077-2018
  • Srinivasan S, N Kholod, V Chaturvedi, PP Ghosh, R Mathur, LE Clarke, M Evans, MI Hejazi, A Kanudia, P Nagar Koti, B Liu, K Parikh, MS Ali, and K Sharma. 2018. "Water for Electricity in India: A Multi-Model Study of Future Challenges and Linkages to Climate Change Mitigation." Applied Energy 210:673-684.  doi:10.1016/j.apenergy.2017.04.079
  • Zhang X, H Li, Z Deng, C Ringler, Y Gao, MI Hejazi, and LYR Leung. 2018. "Impacts of Climate Change, Policy and Water-Energy-Food Nexus on Hydropower Development." Renewable Energy 116(Part A):827-834.  doi:10.1016/j.renene.2017.10.030


  • Turner SWD, MI Hejazi, SH Kim, LE Clarke, and JA Edmonds. 2017. "Climate impacts on hydropower and consequences for global electricity supply investment needs." Energy 141:2081-2090.  doi:10.1016/
  • Li X, CR Vernon, MI Hejazi, RP Link, L Feng, Y Liu, and LT Rauchenstein. 2017. "Xanthos - A Global Hydrologic Model." Journal of Open Research Software 5(1):21.  doi:10.5334/jors.181
  • Liu L, MI Hejazi, HY Li, B Forman, and X Zhang. 2017. "Vulnerability of US thermoelectric power generation to climate change when incorporating state-level environmental regulations." Nature Energy 2:17109.  doi:10.1038/nenergy.2017.109
  • Voisin N, MI Hejazi, LYR Leung, L Liu, M Huang, H Li, and TK Tesfa. 2017. "Effects of spatially distributed sectoral water management on the redistribution of water resources in an integrated water model." Water Resources Research 53(5):4253-4270.  doi:10.1002/2016WR019767
  • Wan W, J Zhao, HY Li, AK Mishra, LY Leung, MI Hejazi, W Wang, H Lu, Z Deng, Y Demissie, and H Wang. 2017. "Hydrological Drought in the Anthropocene: Impacts of Local Water Extraction and Reservoir Regulation in the U.S." Journal of Geophysical Research. D. (Atmospheres) 122(21):11,313–11,328.  doi:10.1002/2017JD026899


  • Liu Y, MI Hejazi, GP Kyle, SH Kim, E Davies, D Miralles, A Teuling, Y He, and D Niyogi. 2016. "Global and regional evaluation of energy for water." Environmental Science & Technology 50(17):9736-9745.  doi:10.1021/acs.est.6b01065
  • Kim SH, MI Hejazi, L Liu, KV Calvin, LE Clarke, JA Edmonds, GP Kyle, PL Patel, MA Wise, and E Davies. 2016. "Balancing Global Water Availability and Use at Basin Scale in an Integrated Assessment Model." Climatic Change 136(2):217-231.  doi:10.1007/s10584-016-1604-6
  • Scott MJ, DS Daly, MI Hejazi, GP Kyle, L Liu, HC McJeon, A Mundra, PL Patel, JS Rice, and N Voisin. 2016. "Sensitivity of Future U.S. Water Shortages to Socioeconomic and Climate Drivers: A Case Study in Georgia Using an Integrated Human-Earth System Modeling Framework." Climatic Change 136(2):233-246.  doi:10.1007/s10584-016-1602-8
  • Voisin N, LYR Leung, and MI Hejazi. 2016. "Drivers of Change in Managed Water Resources: Modeling the Impacts of Climate and Socioeconomic Changes Using the US Midwest as a Case Study." Chapter 9 in Terrestrial Water Cycle and Climate Change: Natural and Human-Induced Impacts, vol. 221, ed. Q Tang and T Oki, pp. 169-192.  John Wiley & Sons, Inc., HOBOKEN, NJ. 
  • Voisin N, MCW Kintner-Meyer, R Skaggs, TB Nguyen, D Wu, JA Dirks, YL Xie, and MI Hejazi. 2016. "Vulnerability of the US Western Electric Grid to Hydro-Climatological Conditions: How bad can it get?" Energy 115(Part 1):1-12.  doi:10.1016/


  • Calvin KV, B Bond-Lamberty, JA Edmonds, MI Hejazi, ST Waldhoff, MA Wise, and Y Zhou. 2015. "The Effects of Climate Sensitivity and Carbon Cycle Interactions on Mitigation Policy Stringency." Climatic Change 131(1):35-50.  doi:10.1007/s10584-013-1026-7
  • Liu L, MI Hejazi, PL Patel, GP Kyle, E Davies, Y Zhou, LE Clarke, and JA Edmonds. 2015. "Water demands for electricity generation in the U.S.: Modeling different scenarios for the water–energy nexus." Technological Forecasting and Social Change 94:318-334.  doi:10.1016/j.techfore.2014.11.004
  • Chaturvedi V, MI Hejazi, JA Edmonds, LE Clarke, GP Kyle, E Davies, and MA Wise. 2015. "Climate Mitigation Policy Implications for Global Irrigation Water Demand." Mitigation and Adaptation Strategies for Global Change 20(3):389-407.  doi:10.1007/s11027-013-9497-4
  • Hejazi MI, N Voisin, L Liu, LM Bramer, DC Fortin, JE Hathaway, M Huang, GP Kyle, LYR Leung, H Li, Y Liu, PL Patel, TC Pulsipher, JS Rice, TK Tesfa, CR Vernon, and Y Zhou. 2015. "21st Century United States Emissions Mitigation Could Increase Water Stress more than the Climate Change it is Mitigating." Proceedings of the National Academy of Sciences of the United States of America 112(34):10635-10640.  doi:10.1073/pnas.1421675112
  • Kraucunas IP, LE Clarke, JA Dirks, JE Hathaway, MI Hejazi, KA Hibbard, M Huang, C Jin, MCW Kintner-Meyer, K Kleese van Dam, LYR Leung, H Li, RH Moss, MJ Peterson, JS Rice, MJ Scott, AM Thomson, N Voisin, and TO West. 2015. "Investigating the Nexus of Climate, Energy, Water, and Land at Decision-Relevant Scales: The Platform for Regional Integrated Modeling and Analysis (PRIMA)." Climatic Change 129(3-4):573-588.  doi:10.1007/s10584-014-1064-9
  • Li H, LYR Leung, TK Tesfa, N Voisin, MI Hejazi, L Liu, Y Liu, JS Rice, H Wu, and X Yang. 2015. "Modeling stream temperature in the Anthropocene: An earth system modeling approach." Journal of Advances in Modeling Earth Systems 7(4):1661-1679.  doi:10.1002/2015MS000471
  • Strzepek K, J Neumann, J Smith, J Martinich, B Boehlert, MI Hejazi, J Henderson, C Wobus, R Jones, KV Calvin, D Johnson, E Monier, J Strzepek, and JH Yoon. 2015. "Benefits of Greenhouse Gas Mitigation on the Supply, Management, and Use of Water Resources in the United States." Climatic Change 131(1):127-141.  doi:10.1007/s10584-014-1279-9
  • Zhou Y, MI Hejazi, SJ Smith, JA Edmonds, H Li, LE Clarke, KV Calvin, and AM Thomson. 2015. "A Comprehensive View of Global Potential for Hydro-generated Electricity." Energy and Environmental Science 8(9):2622-2633.  doi:10.1039/c5ee00888c


  • Hejazi MI, X Cai, X Yuan, XZ Liang, and P Kumar. 2014. "Incorporating reanalysis-based short-term forecasts from a regional climate model in an irrigation scheduling optimization problem." Journal of Water Resources Planning and Management 140(5):699-713.  doi:10.1061/(ASCE)WR.1943-5452.0000365
  • Hejazi MI, JA Edmonds, LE Clarke, GP Kyle, E Davies, V Chaturvedi, MA Wise, PL Patel, J Eom, KV Calvin, RH Moss, and SH Kim. 2014. "LONG-TERM GLOBAL WATER USE PROJECTIONS USING SIX SOCIOECONOMIC SCENARIOS IN AN INTEGRATED ASSESSMENT MODELING FRAMEWORK." Technological Forecasting and Social Change 81:205-226.  doi:10.1016/j.techfore.2013.05.006
  • Hejazi MI, JA Edmonds, LE Clarke, GP Kyle, E Davies, V Chaturvedi, MA Wise, PL Patel, J Eom, and KV Calvin. 2014. "Integrated assessment of global water scarcity over the 21st century - Part 2: Climate change mitigation policies." Hydrology and Earth System Sciences 18(8):2859-2883.  doi:10.5194/hessd-10-3383-2013
  • Hejazi MI, JA Edmonds, LE Clarke, GP Kyle, E Davies, V Chaturvedi, MA Wise, PL Patel, J Eom, and KV Calvin. 2014. "Integrated Assessment of Global Water Scarcity over the 21st Century under Multiple Climate Change Mitigation Policies." Hydrology and Earth System Sciences 18(8):2859-2883.  doi:10.5194/hess-18-2859-2014
  • Hejazi MI, JA Edmonds, LE Clarke, GP Kyle, E Davies, V Chaturvedi, MA Wise, PL Patel, J Eom, and KV Calvin. 2014. "Integrated assessment of global water scarcity over the 21st century under multiple climate change mitigation policies." Hydrology and Earth System Sciences 18(8):2859–2883.  doi:10.5194/hess-18-2859-2014


  • Chaturvedi V, MI Hejazi, JA Edmonds, LE Clarke, GP Kyle, E Davies, MA Wise, and KV Calvin. 2013. Climate policy implications for agricultural water demandPNNL-22356, Pacific Northwest National Laboratory, Richland, WA. 
  • Hejazi MI, JA Edmonds, V Chaturvedi, E Davies, and J Eom. 2013. "Scenarios of Global Municipal Water-Use Demand Projections over the 21st Century." Hydrological Sciences Journal 58(3):1-20.  doi:10.1080/02626667.2013.772301
  • Kyle GP, E Davies, JJ Dooley, SJ Smith, LE Clarke, JA Edmonds, and MI Hejazi. 2013. "Corrigendum to "Influence of climate change mitigation technology on global demands of water for electricity generation"." International Journal of Greenhouse Gas Control 17:549-552.  doi:10.1016/j.ijggc.2013.03.017
  • Kyle GP, E Davies, JJ Dooley, SJ Smith, LE Clarke, JA Edmonds, and MI Hejazi. 2013. "Influence of Climate Change Mitigation Technology on Global Demands of Water for Electricity Generation." International Journal of Greenhouse Gas Control 13:112–123.  doi:10.1016/j.ijggc.2012.12.006
  • Voisin N, L Liu, MI Hejazi, TK Tesfa, H Li, M Huang, Y Liu, and LYR Leung. 2013. "One-way coupling of an integrated assessment model and a water resources model: evaluation and implications of future changes over the US Midwest ." Hydrology and Earth System Sciences 17(No. 11):4555-4575.  doi:10.5194/hess-17-4555-2013


  • Hejazi MI, JA Edmonds, and V Chaturvedi. 2012. "Global irrigation demand - A holistic approach." Irrigation & Drainage Systems Engineering 1(2):Article No. e106. 


  • Cai X, MI Hejazi, and D Wang. 2011. "Value of Probabilistic Weather Forecasts: Assessment by Real-Time Optimization of Irrigation Scheduling." Journal of Water Resources Planning and Management 137(5):391-403.  doi:10.1061/(ASCE)WR.1943-5452.0000126
  • Wang D, and MI Hejazi. 2011. "Quantifying the relative contribution of the climate and direct human impacts on mean annual streamflow in the contiguous United States." Water Resources Research 47:Article No. W00J12.  doi:10.1029/2010WR010283

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