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Perennial rhizomatous grasses as bioenergy feedstock in SWAT: parameter development and model improvement

Journal Article · · Global Change Biology. Bioenergy
DOI:https://doi.org/10.1111/gcbb.12210· OSTI ID:1437637
 [1];  [2];  [3];  [4];  [3];  [3]
  1. Purdue Univ., West Lafayette, IN (United States). Dept. of Agricultural and Biological Engineering. Dept. of Agronomy; Purdue University
  2. Purdue Univ., West Lafayette, IN (United States). Dept. of Agricultural and Biological Engineering
  3. Purdue Univ., West Lafayette, IN (United States). Dept. of Agronomy
  4. Purdue Univ., West Lafayette, IN (United States). Dept. of Agricultural and Biological Engineering. Dept. of Earth, Atmospheric and Planetary Sciences

The Soil and Water Assessment Tool (SWAT) is increasingly used to quantify hydrologic and water quality impacts of bioenergy production, but crop-growth parameters for candidate perennial rhizomatous grasses (PRG) Miscanthus × giganteus and upland ecotypes of Panicum virgatum (switchgrass) are limited by the availability of field data. Crop-growth parameter ranges and suggested values were developed in this study using agronomic and weather data collected at the Purdue University Water Quality Field Station in northwestern Indiana. During the process of parameterization, the comparison of measured data with conceptual representation of PRG growth in the model led to three changes in the SWAT 2009 code: the harvest algorithm was modified to maintain belowground biomass over winter, plant respiration was extended via modified-DLAI to better reflect maturity and leaf senescence, and nutrient uptake algorithms were revised to respond to temperature, water, and nutrient stress. Parameter values and changes to the model resulted in simulated biomass yield and leaf area index consistent with reported values for the region. Code changes in the SWAT model improved nutrient storage during dormancy period and nitrogen and phosphorus uptake by both switchgrass and Miscanthus.

Research Organization:
Purdue Univ., West Lafayette, IN (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Bioenergy Technologies Office (EE-3B); USDA National Inst. of Food and Agriculture (NIFA)
Grant/Contract Number:
EE0004396
OSTI ID:
1437637
Alternate ID(s):
OSTI ID: 1400445
Journal Information:
Global Change Biology. Bioenergy, Journal Name: Global Change Biology. Bioenergy Journal Issue: 6 Vol. 7; ISSN 1757-1693
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (7)

Description and Codification of Miscanthus × giganteus Growth Stages for Phenological Assessment journal October 2017
Synthesizing models useful for ecohydrology and ecohydraulic approaches: An emphasis on integrating models to address complex research questions: synthesis of models with an emphasis on integration journal April 2018
Perennial biomass production from marginal land in the Upper Mississippi River Basin journal May 2018
A Race Against Time: Modeling Time Lags in Watershed Response journal May 2019
Hydrologic and water quality responses to biomass production in the Tennessee river basin journal August 2018
Valuation of ecosystem services in alternative bioenergy landscape scenarios journal March 2019
Soil & Water Assessment Tool (SWAT) simulated hydrological impacts of land use change from temperate grassland to energy crops: A case study in western UK journal June 2019

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