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FEST-C 1.3 & 2.0 for CMAQ Bi-directional NH3, Crop Production, and SWAT Modeling
Citation:
Yang, D., E. Cooter, L. Ran, V. Benson, J. Bowden, K. Talgo, AND A. Hanna. FEST-C 1.3 & 2.0 for CMAQ Bi-directional NH3, Crop Production, and SWAT Modeling. 16th Annual CMAS Conference, Chapel Hill, NC, October 23 - 25, 2017.
Impact/Purpose:
Model development and evaluation is key to improving the quality of information and products we deliver to EPA Regions and Program offices. This poster summarizes recent FEST-C tool improvements, EPIC model improvements and EPIC simulation evaluations that support bi-directional CMAQ simulations for OAR and SWAT model applications of interest to OW. This work supports ORD research programs/tasks ACE AIMS-2, SSWR 4.02b, SSWR 4.03C and SHC 4.61.4.
Description:
The Fertilizer Emission Scenario Tool for CMAQ (FEST-C) is developed in a Linux environment, a festc JAVA interface that integrates 14 tools and scenario management options facilitating land use/crop data processing for the Community Multiscale Air Quality (CMAQ) modeling system and Soil and Water Assessment Tool (SWAT), and visualization. FEST-C version 2.0, EPIC1102 with an improved treatment of N modeling will replace version FEST-C 1.3, EPIC0509. Extracted and summarized yearly/daily data can be used for CMAQ Bi-directional NH3 and SWAT modeling, agricultural production, and environmental impact analysis. It is always challenging to accurately estimate ammonia emissions in space and time since fertilizer applications vary in time and quantity, across crop types and locations. In addition, soil chemical processes differ according to soil properties and management practices. A coupled atmospheric (CMAQ) and soil biogeochemical agricultural crop modeling system enables more temporally and spatially resolved soil NH3 emission estimates than estimates based on county-level fertilizer sales data and state-level climatology. Evaluation suggests that simulated Corn grain planting dates are good, cut soybean planting and harvesting dates are little early. Hay, alfalfa, corn grains, and soybean yields are good on average, but are high in the east. Fertilizer applied to hay, corn grain, wheat, and other crop are the major U.S. nitrogen contributors. Hay, corn grain, soybean, other crop account for the majority of phosphorus applications. A N budget analysis for 2011 indicates that 8% of N external input is from N deposition and 2/3 of the input comes from fertilization. Mineralization is a big source for soil N available to plants.
