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ARS Home » Plains Area » El Reno, Oklahoma » Oklahoma and Central Plains Agricultural Research Center » Agroclimate and Hydraulics Research Unit » Research » Publications at this Location » Publication #413911
Research Project: Impacts of Variable Land Management and Climate on Water and Soil Resources

Location: Agroclimate and Hydraulics Research Unit

Title: Swat-IRG: A novel irrigation algorithm in soil water assessment tool

Author
item XIANG, ZAICHEN - Oklahoma State University
item Moriasi, Daniel
item SAMIMI, MARYAM - Oklahoma State University
item MIRCHI, ALI - Oklahoma State University
item TAGHVAEIAN, SALEH - University Of Nebraska

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 3/18/2024
Publication Date: 7/28/2024
Citation: Xiang, Z., Moriasi, D.N., Samimi, M., Mirchi, A., Taghvaeian, S. 2024. Swat-IRG: A novel irrigation algorithm in soil water assessment tool. Meeting Abstract. 2024 ASABE Annual International Meeting, July 28-31, 2024, Anaheim, CA.

Interpretive Summary:

Technical Abstract: Irrigation water allocation, scheduling, and application have the potential to change the magnitude of different components of the water budget in agricultural regions. However, many physically-based watershed hydrology and water quality models, including the Soil and Water Assessment Tool (SWAT), primarily simulate the water budget in terms of the quantity of applied irrigation water, without capturing the nuances of how different irrigation systems and schedules affect hydrologic fluxes in irrigated agricultural areas. Thus, the objective of this study is to develop and evaluate a novel irrigation routine, named SWAT-IRG, to enhance SWAT’s simulation of irrigation. SWAT-IRG facilitates the evaluation of scenarios related to irrigation water management and changes in cropping systems influenced by different irrigation systems (e.g., surface irrigation, sprinkler irrigation, and drip irrigation) at various spatial scales (e.g., hydrologic response unit (HRU), subbasin, and watershed). The new process-based irrigation was written in FORTRAN routine and integrated into SWAT2012. We will present a case study in the Fort Cobb Reservoir Experimental Watershed (FCREW) located in central Oklahoma to demonstrate the utility of SWAT-IRG to evaluate the impacts of different irrigation technologies and crop production systems on the water budget and water resource sustainability. USDA is an equal opportunity provider and employer.