Submitted to: Transactions of the ASABE
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: August 1, 2007
Publication Date: August 1, 2007
Citation: Yu, Q., Flerchinger, G.N., Xu, S., Kozak, J.A., Ma, L., Ahuja, L.R. 2007. Energy balance simulation of a wheat canopy using the rz-shaw (rzwqm-shaw) model. Trans. of ASABE 50(5): 1507-1516. Interpretive Summary: The Root Zone Water Quality Model (RZWQM) is a powerful research and management tool for simulating crop growth, nutrient processes and water quality impacts, however its ability to track over-winter conditions were limited. A hybrid model coupling RZWQM and the Simultaneous Heat and Water (SHAW) model, termed RZ-SHAW, was developed to improve soil temperature simulation and over-winter snow and frozen soil effects within the model. The study evaluated the RZ-SHAW by comparing model simulations of heat, water and crop growth components with field measurements. The results demonstrated a successful coupling of RZWQM and SHAW in terms of canopy energy balance simulation. RZ-SHAW is offered as a new comprehensive model for simulating management and climate effects on crop development, nutrient cycling, runoff and water quality. Emergence and development of crops, their pests, and various soil organisms are altered by heat and water movement near the soil-atmosphere interface. The ability to accurately simulate heat, water and nutrient movement at the surface and within the soil can enhance land management.