| Simulating Coupled Soil Heat and Water Transport: A Comparison of HYDRUS-1D, SWAP, and an Analytical R Script |
| کد مقاله : 1642-ISSC19 |
| نویسندگان |
|
یوسف هاشمی نژاد *1، Thomas Berends2، میثم رضایی3 1استادیار پژوهش، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان خراسان رضوی 2Delft University of Technology 3استادیار، موسسه تحقیقات خاک و آب، سازمان تحقیقات، آموزش و ترویج کشاورزی، کرج ایران |
| چکیده مقاله |
| Accurate simulation of coupled soil heat and water transport is crucial for optimizing irrigation and understanding land-atmosphere interactions in semi-arid regions. This study compares the performance of three modeling approaches—the physically-based HYDRUS-1D model, the integrated soil-water- atmosphere-plant model SWAP, and an analytical solution implemented in R—in simulating soil temperature and water dynamics during summer irrigation events. The models were applied under simplified semi-arid conditions with three irrigation events. Results indicate that HYDRUS-1D, with its detailed coupling of water flow and heat transport, effectively captured the rapid cooling effects immediately after irrigation. SWAP provided a robust representation of the system's energy balance, showing a dampening effect on diurnal temperature fluctuations due to increased soil moisture. The analytical R model, while computationally efficient and transparent, was limited by its assumption of constant soil properties, failing to dynamically represent irrigation-induced changes. The choice of model therefore depends on the specific research objective: HYDRUS-1D for detailed process analysis, SWAP for agro-ecosystem studies over growing season, and the R-based solution for theoretical explorations under steady-state conditions. Incorporating dynamic feedback between soil moisture and thermal properties is identified as a key factor for an accurate prediction of soil temperature. |
| کلیدواژه ها |
| Soil Temperature Modeling, HYDRUS-1D, SWAP, R Programming, Heat Transport, Irrigation, Evaporative Cooling |
| وضعیت: پذیرفته شده مشروط برای ارائه شفاهی |
