Research Interests                                                      

  • Ecohydrology• Soil & Water Resources • Soil erosion  • Land Degradation   • Water – Energy – Food Nexus

I am a broadly trained environmental scientist interested in understanding surface processes in terrestrial ecosystems, in the context of land degradation induced by climate change and human activities. My research areas include: (1) Ecohydrological feedbacks accompanying land use changes and their impact on soil and water degradation (2) Implications of renewable energy development on land, water resources and food security. I use a variety of research tools to address my research questions including manipulative field experiments, laboratory experiments, data analysis, and modeling.

Solar energy- Agriculture colocation : The goal is to facilitate low-impact renewable energy designs by exploring the feasibility of agricultural/range co-location  or “Agrivoltaics” opportunities at multiple test sites. This research will develop a new approach to co-locating large energy systems and agriculture/range, by adding optimization of water use and environmental impacts to the site criteria. Study areas include Southwestern United States, Indonesia, and northwestern India. (Funded by NSF CAREER/ DOE)

I am interested also, in the opportunities to incorporate micro-scale renewable (solar) energy into existing cropping systems in the developing world, where crop-energy colocation may provide several co-benefits (rural electrification, employment generation, energy for processing agricultural commodities locally). (Funded by Department of Energy/Alliance for Sustainable Energy LLC)

Over the past ten years, we studied the co-location of solar energy with crops/biofuels, grazing  and/or pollinator-friendly native plants at multiple sites around the world, and the highlighted the environmental and socio-economic co-benefits. Learn more about our work: Ravi et al 2012, 2014, 2015, 2016, Choi et al, 2020, 2021, Bertel et al 2021, ; Towner et al 2021; Macknick et al., 2022.


Pathways of land degradation: Pathways of ecosystem degradation in croplands and rangelands, involving changes in connected pathways (for sediment transport, fire) in the landscape, and the role of shrub encroachment and exotic grass invasions in inducing grassland/rangeland  degradation by altering these pathways. (NSF)

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Soil erosion and ecosystems: Effects of hydro-climatic variables (e.g. air humidity, soil moisture), vegetation and management practices (e.g. fire, grazing, tillage) on wind erosion and dust emissions, using a combination of wind tunnel experiments, field monitoring and modeling. This investigation will provide important information for the estimation and modeling of dust emissions. 

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Hydrological and aeolian controls on vegetation patterns: I am interested in understanding the hydrological and aeolian controls on vegetation patterns and how vegetation patterns, in turn, affect these processes. (NSF)