عنوان مقاله [English]
The aim of this study was to investigate the influence of discharge on wetting pattern and simulation by HYDRUS-2D model. After preparing a physical model made of Plexiglas with specified dimensions, and filled with silty clay loam soils. By manually adjustable emitter, four discharges 2, 4, 6 and 8 liters per hour were tested. Irrigation time for each fixed discharge 2 hours and for moisture reparation distribution, 24hours is validated. Comparison of measured and calculated values with HYDRUS-2D model of the diameter and depth of the wetting front revealed that the correlation coefficient was above 90 percent of all discharges and was very low error rate which shows the ability of the HYDRUS-2D model to simulate the moisture but this ability was higher in the lower discharge. A comparison between the simulation with HYDRUS-2D model using data from various input Rosetta and data observations of wet pattern soil showed the input data of the model Rosetta is more will increase accurate simulation with HYDRUS-2D model. By increasing the discharge, the extent of depth decrease and extent of the surface moisture increases. The performance of HYDRUS-2D model in lower discharge is more. And by increases the amount of data inputs to the model Rosetta, HYDRUS-2D model will be having higher accuracy
-Azhdary, Kh. 2008. Simulation of Moisture distribution in soil under Drip Irrigation System Using HYDRUS-2D model. Journal of Agric. Sci. Natur. Resour. Vol.15(1). ( In Persian)
-Ghorbanian, M., M.S. Monjzi, H. Ebrahimian, and A. Liyaghat. 2014. Evaluation of HYDRUS-2D and SEEP/W Models to Estimate Wetting Front for Surface and Subsurface Gravity Drip Irrigation. Journal of Soil and Water (Agricultural Science and Technology).28(1). (In Persian)
-Khalili, M., M. Akbari, A. Hezarjaribi, M. Zakerinia, and F. Abbasi. 2014. Numerical versus empirical models for estimating wetting patterns in subsurface drip irrigation systems. Journal of agricultural engineering research/vol. 15/No.2/2014/P:1-14. (In Persian)
-Khorami, M., A. Alizade and H. Ansari. 2013. Simulation of Water Movement and Moisture Redistribution under Drip Irrigation Systems Using Hydrus 2D/3D. Journal of Soil and Water (Agricultural Science and Technology). 27(4).( in Persian)
-Kandelous, M.M. and J. Simunek. 2010a. Comparison of numerical, analytical and empirical models to estimate wetting pattern for surface and subsurface drip irrigation. Irrig. Sci. 28(1):435-444.
-Kandelous, M.M. and J. Simunek. 2010b. Numerical simulations of water movement in a subsurface drip irrigation system under field and laboratory conditions using HYDRUS-2D. (Agric). Water Manag. 97(4): 1070-1076.
-Malek, K. and R.T. Peters. 2011.Wetting pattern models for drip irrigation: new empirical model.J.Irrig. Drain. (Eng).137(8):530-537.
-Maziar, M. and J.S. Kandelous. 2010. Numerical simulations of water movement in a subsurface drip irrigation system under field and laboratory conditions using HYDRUS-2D. Agricultural Water Management, 1070-1076.
-Naglic, B., C. Kechavarzi and M. Pintar. 2012. Modelling of water distribution under drip irrigation systems. Hmeljarskibilten / Hop Bulletin 19.
-Provenzano, G.2007.Using HYDRUS-2D simulation model evaluate wetted soil volume in subsurface drip irrigation systems. (Eng.). J. Irrig. 133(4):342-349.
-Phull, A.M. and M.M. Babar.2012.Summulation of soil wetting pattern of subsurface drip irrigation system. (Istanbul, Turkey). Sixteenth International Water Technology Conference, IWTC 16.
-Samadianfard, S., A. Ashrafsadrodini, A.H. Nazemi, and D. Farsadizadeh. 2012. Simulation numerical and analysis wetting front at Drip Irrigation System. Journal of Knowledge Water and Soil. 22(3). (In Persian)
-Sejna, M., J. Simunek, and M.Th. Van Genuchten. 2011. The HYDRUS software package for simulating two- and three-dimensional movement of water, heat, and multiple solutes in variably- saturated media: user manual. Version 2.0. PC-Progress Prague,CzechRepublic. 284.
-Sharifnia, R., F. Mirzaei, and A. Liaghat. 2009. Effective factors the wetting and correction of drip irrigation emitters located on slopes. Journal of Iran Water Research.3(5).(in Persian)
-Simunek, J., M.Th. Van Genuchten and M. sejna. 2006. The HYDRUS software package for simulating two- and three- dimensional movement of water, heat, and multiple solutes in variably-saturated media: technical manual. Version 1.0. PC-Progress, Prague, Czech Republic.213.
-Skaggs, T.H., T. Trou, J. Simunek and P.J. Shouse. 2004. Comparison of HYDRUS-2D simulations of drip irrigation with experimental observations. J. Irrig. Drain. 304–310.