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Title: Water impacts of U.S. biofuels: Insights from an assessment combining economic and biophysical models

Journal Article · · PLoS ONE
 [1]; ORCiD logo [2];  [3];  [2]
  1. International Energy Agency, Sustainable Technology Outlooks, Paris (France)
  2. Chalmers Univ. of Technology, Gothenburg (Sweden)
  3. Univ. of Illinois, Urbana-Champaign, IL (United States). Dept. of Agricultural and Consumer Economics

Biofuels policies induce land use changes (LUC), including cropland expansion and crop switching, and this in turn alters water and soil management practices. Policies differ in the extent and type of land use changes they induce and therefore in their impact on water resources. We quantify and compare the spatially varying water impacts of biofuel crops stemming from LUC induced by two different biofuels policies by coupling a biophysical model with an economic model to simulate the economically viable mix of crops, land uses, and crop management choices under alternative policy scenarios. We assess the outputs of an economic model with a high-resolution crop-water model for major agricultural crops and potential cellulosic feedstocks in the US to analyze the impacts of three alternative policy scenarios on water balances: a counterfactual ‘no-biofuels policy’ (BAU) scenario, a volumetric mandate (Mandate) scenario, and a clean fuel-intensity standard (CFS) scenario incentivizing fuels based on their carbon intensities. While both biofuel policies incentivize more biofuels than in the counterfactual, they differ in the mix of corn ethanol and advanced biofuels from miscanthus and switchgrass (more corn ethanol in Mandate and more cellulosic biofuels in CFS). The two policies differ in their impact on irrigated acreage, irrigation demand, groundwater use and runoff. Net irrigation requirements increase 0.7% in Mandate and decrease 3.8% in CFS, but in both scenarios increases are concentrated in regions of Kansas and Nebraska that rely upon the Ogallala aquifer for irrigation water. Our study illustrates the importance of accounting for the overall LUC and shifts in agricultural production and management practices in response to policies when assessing the water impacts of biofuels.

Research Organization:
Univ. of Illinois at Urbana-Champaign, IL (United States); Center for Advanced Bioenergy and Bioproducts Innovation (CABBI), Urbana, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
SC0018420
OSTI ID:
1479464
Alternate ID(s):
OSTI ID: 1991836
Journal Information:
PLoS ONE, Vol. 13, Issue 9; ISSN 1932-6203
Publisher:
Public Library of ScienceCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

References (72)

Does the U.S. Cropland Data Layer Provide an Accurate Benchmark for Land-Use Change Estimates? journal January 2016
Stacking Low Carbon Policies on the Renewable Fuels Standard: Economic and Greenhouse Gas Implications journal January 2012
National Low Carbon Fuel Standard: Policy Design Recommendations journal January 2012
Climate Change Would Increase the Water Intensity of Irrigated Corn Ethanol journal May 2013
Biofuel scenarios in a water perspective: The global blue and green water footprint of road transport in 2030 journal August 2012
FAO-56 Dual Crop Coefficient Method for Estimating Evaporation from Soil and Application Extensions journal February 2005
Multimetric spatial optimization of switchgrass plantings across a watershed journal January 2012
Impacts of a 32-billion-gallon bioenergy landscape on land and fossil fuel use in the US journal January 2016
The water footprint of energy from biomass: A quantitative assessment and consequences of an increasing share of bio-energy in energy supply journal February 2009
Improvements to a MODIS global terrestrial evapotranspiration algorithm journal August 2011
Simulating switchgrass biomass production across ecoregions using the DAYCENT model journal November 2011
Multifunctional landscapes: Site characterization and field-scale design to incorporate biomass production into an agricultural system journal September 2015
Water quality impact assessment of large-scale biofuel crops expansion in agricultural regions of Michigan journal May 2011
Managing Multiple Mandates: A System of Systems Model to Analyze Strategies for Producing Cellulosic Ethanol and Reducing Riverine Nitrate Loads in the Upper Mississippi River Basin journal September 2015
Assessing Irrigation Aquifer Depletion: Introduction journal December 2017
Watershed-scale impacts of bioenergy crops on hydrology and water quality using improved SWAT model journal January 2016
Water Intensity of Transportation journal November 2008
On the Indirect Effect of Biofuel journal June 2013
Low carbon fuel policy and analysis journal May 2013
Biofuels and water quality: challenges and opportunities for simulation modeling journal May 2010
Recent grassland losses are concentrated around U.S. ethanol refineries journal March 2017
Life Cycle Water Consumption and Withdrawal Requirements of Ethanol from Corn Grain and Residues journal May 2011
Stacking low carbon policies on the renewable fuels standard: Economic and greenhouse gas implications journal May 2013
Impact assessment at the bioenergy-water nexus journal July 2011
Comparison of Bottom-Up and Top-Down Approaches to Calculating the Water Footprints of Nations journal December 2011
CropScape: A Web service based application for exploring and disseminating US conterminous geospatial cropland data products for decision support journal June 2012
Comparative water use by maize, perennial crops, restored prairie, and poplar trees in the US Midwest journal June 2015
Spatio-Temporal Impacts of Biofuel Production and Climate Variability on Water Quantity and Quality in Upper Mississippi River Basin journal June 2015
A regional comparison of water use efficiency for miscanthus, switchgrass and maize journal October 2012
Switchgrass in California: where, and at what price? journal May 2013
National Low Carbon Fuel Standard: Technical Analysis Report journal January 2012
Impacts of biofuels production alternatives on water quantity and quality in the Iowa River Basin journal January 2012
Supply of Cellulosic Biofuel Feedstocks and Regional Production Pattern journal November 2010
Reduced Nitrogen Losses after Conversion of Row Crop Agriculture to Perennial Biofuel Crops journal January 2013
Modeling Miscanthus in the Soil and Water Assessment Tool (SWAT) to Simulate Its Water Quality Effects As a Bioenergy Crop journal September 2010
Recent land use change in the Western Corn Belt threatens grasslands and wetlands journal February 2013
Water Consumption in the Production of Ethanol and Petroleum Gasoline journal September 2009
Alternative transportation fuel standards: Welfare effects and climate benefits journal May 2014
Water Footprint of U.S. Transportation Fuels journal April 2011
Water Embodied in Bioethanol in the United States journal April 2009
Carbon savings with transatlantic trade in pellets: accounting for market-driven effects journal November 2015
Taking into account water use impacts in the LCA of biofuels: an Argentinean case study journal August 2011
Comment on “Modeling Miscanthus in the Soil and Water Assessment Tool (SWAT) to Simulate Its Water Quality Effects As a Bioenergy Crop” journal July 2011
Taking into account water use impacts in the LCA of biofuels: an Argentinean case study text January 2011
Large-Scale Hydrological Modeling for Calculating Water Stress Indices: Implications of Improved Spatiotemporal Resolution, Surface-Groundwater Differentiation, and Uncertainty Characterization journal April 2015
Assessing County-Level Water Footprints of Different Cellulosic-Biofuel Feedstock Pathways journal July 2012
Water use efficiency of perennial and annual bioenergy crops in central Illinois: WATER USE EFFICIENCY OF BIOFUEL CROPS journal April 2013
The Interplay Between Bioenergy Grass Production and Water Resources in the United States of America journal February 2016
Biofuel, land and water: maize, switchgrass or Miscanthus ? journal February 2013
Accounting for the water impacts of ethanol production journal January 2010
Quantifying Hydrologic and Water Quality Responses to Bioenergy Crops in Town Creek Watershed in Mississippi journal January 2013
Implications for the hydrologic cycle under climate change due to the expansion of bioenergy crops in the Midwestern United States journal August 2011
and Switchgrass Production in Central Illinois: Impacts on Hydrology and Inorganic Nitrogen Leaching journal January 2010
The Water Footprint of Biofuels: A Drink or Drive Issue? journal May 2009
Modeling the Land-Use and Greenhouse-Gas Implications of Biofuels journal August 2012
Cropland expansion outpaces agricultural and biofuel policies in the United States journal April 2015
Understanding the LCA and ISO water footprint: A response to Hoekstra (2016) “A critique on the water-scarcity weighted water footprint in LCA” journal January 2017
Alternative Transportation Fuel Standards: Welfare Effects and Climate Benefits journal January 2011
Measuring Indirect Land Use Change with Biofuels: Implications for Policy text January 2011
The Ethanol Decade: An Expansion of U.S. Corn Production, 2000-09 journal January 2011
Review: groundwater management practices, challenges, and innovations in the High Plains aquifer, USA—lessons and recommended actions journal November 2009
Increased biofuel production in the coming decade: to what extent will it affect global freshwater resources? journal February 2009
Competition for Land in the Global Bioeconomy journal January 2012
The WULCA consensus characterization model for water scarcity footprints: assessing impacts of water consumption based on available water remaining (AWARE) journal June 2017
Evaluation of water use for bioenergy at different scales journal July 2011
An Econometric Analysis of U.S. Crop Yield and Cropland Acreage: Implications for the Impact of Climate Change journal January 2010
Measuring Indirect Land Use Change with Biofuels: Implications for Policy journal August 2012
Competition for land in the global bioeconomy: T. Hertel et al. journal July 2013
A review of low carbon fuel policies: Principles, program status and future directions journal October 2016
Impact of emerging clean vehicle system on water stress journal November 2013
Consensus building on the development of a stress-based indicator for LCA-based impact assessment of water consumption: outcome of the expert workshops journal March 2015
Mining dense Landsat time series for separating cropland and pasture in a heterogeneous Brazilian savanna landscape journal January 2015

Cited By (1)

Regenerating Agricultural Landscapes with Perennial Groundcover for Intensive Crop Production journal August 2019