SIMULATION OF 2D SOIL MOISTURE DISTRIBUTION UNDER SUBSURFACE DRIP IIRRIGATION

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NAYEBLOIE FATEMEH; KOUCHAKZADEH MAHDI; EBRAHIMI KUMARS; HOMAEE MAHDI; ABBASI FARIBORZ

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Journal: Iranian Journal of Soil and Water Research Year:2015 | Volume:46 | Issue:2 Page(s): 221-229

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Title

SIMULATION OF 2D SOIL MOISTURE DISTRIBUTION UNDER SUBSURFACE DRIP IIRRIGATION

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Keywords

SIMULATIONQ2

SUBSURFACE IRRIGATIONQ2

WASTEWATERQ2

HYDRUSQ2

Abstract

Information on water soil content and its distribution is vital for field water management in SUBSURFACE IRRIGATION. The objective followed in this study was to simulate the extent of WASTEWATER distribution taking into account root water uptake and evaporation from the soil surface under, subsurface drip irrigation system. In this regard, a field experiment was conducted with lettuce as the crop, to collect the required data. Soil hydraulic properties were obtained through an assessment of in-situ soil water pressure heads as well as water contents. Soil matric potentials, under tensiometery range, were obtained by use of tensiometers and the related water contents by a TDR instrument. For the SIMULATION purposes, the HYDRUS-2D model was made use of. The model performance was evaluated by comparing the measured us the predicted values using Root Mean Square Error (RMSE) statistics. The results of the spatial SIMULATION revealed that this model provides more appropriate results in locations farther away, and deeper than The drippers (RMSE=0.03) as compared with the points adjacent to the droppers and less deeper ones (RMSE=0.008). The results of the temporal SIMULATION showed that the model worked more accurately within 48 hrs after irrigation (RMSE=0.005) rather than one following the start of irrigation (RMSE=0.029). Therefore, it can be concluded that soil water content in subsurface drip irrigation system can be reasonably simulated while root water uptake and evaporation processes are both actively going on.

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APA: Copy

NAYEBLOIE, FATEMEH, KOUCHAKZADEH, MAHDI, EBRAHIMI, KUMARS, HOMAEE, MAHDI, & ABBASI, FARIBORZ. (2015). SIMULATION OF 2D SOIL MOISTURE DISTRIBUTION UNDER SUBSURFACE DRIP IIRRIGATION. IRANIAN JOURNAL OF SOIL AND WATER RESEARCH, 46(2), 221-229. SID. https://sid.ir/paper/225551/en

Vancouver: Copy

NAYEBLOIE FATEMEH, KOUCHAKZADEH MAHDI, EBRAHIMI KUMARS, HOMAEE MAHDI, ABBASI FARIBORZ. SIMULATION OF 2D SOIL MOISTURE DISTRIBUTION UNDER SUBSURFACE DRIP IIRRIGATION. IRANIAN JOURNAL OF SOIL AND WATER RESEARCH[Internet]. 2015;46(2):221-229. Available from: https://sid.ir/paper/225551/en

IEEE: Copy

FATEMEH NAYEBLOIE, MAHDI KOUCHAKZADEH, KUMARS EBRAHIMI, MAHDI HOMAEE, and FARIBORZ ABBASI, “SIMULATION OF 2D SOIL MOISTURE DISTRIBUTION UNDER SUBSURFACE DRIP IIRRIGATION,” IRANIAN JOURNAL OF SOIL AND WATER RESEARCH, vol. 46, no. 2, pp. 221–229, 2015, [Online]. Available: https://sid.ir/paper/225551/en

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