IMPROVED WATER QUALITY THROUGH WATER TABLE MANAGEMENT IN A SEMI ARID REGION OF IRAN

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NOURI H.; LIAGHAT A.A.M.; FARDAD H.; CHAEICHI M.R.

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Paper Information

Journal: Iranian Journal of Irrigation and Drainage Year:2007 | Volume:1 | Issue:1 Page(s): 41-48

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Title

IMPROVED WATER QUALITY THROUGH WATER TABLE MANAGEMENT IN A SEMI ARID REGION OF IRAN

Author(s)

NOURI H. | LIAGHAT A.A.M. | FARDAD H. | CHAEICHI M.R. | Issue Writer Certificate

Keywords

SUBIRRIGATIONQ3

EFFLUENT ELECTRIC CONDUCTIVITYQ1

LYSIMETER; NITRATEQ2

PHOSPHOROUSQ3

WATER TABLE MANAGEMENTQ2

Abstract

A field study was conducted in Iran to evaluate the effects of WATER TABLE MANAGEMENT on quality of subsurface drain flows. Drain discharge volumes, N03-N concentrations, PHOSPHOROUS concentrations and electric conductivity in drainage effluent were monitored during the growing seasons. Lysimetric site with drainage system and water table control system were prepared and annual alfalfa (Medicago Scatella) was cropped. The WTM treatments consisted of three SUBIRRIGATION treatments with water table controls set at 0.3 m (CWT0.3), 0.5 m (CWT0.5), 0.7 m (CWT0.7) from the soil surface and a conventional free drainage (FD) treatment (water table more than 1.00 m below the soil surface). Drain flow volumes and N03-N concentrations were significantly reduced by WTM as compared with free drainage. Mean NO3-N concentrations in drainage water were reduced by 78.6%, 65.6% and 49.3% by the 0.3, 0.5 and 0.7 m controlled water table depths, respectively. Total drain flow was reduced by 49.6% and 41% by the 0.3 and 0.5 m controlled water table depths, respectively. Consequently, NO3-N loading was also reduced by 90% and 82% by the 0.3 and 0.5 controlled water table depths, respectively. Improvements in drainage water quality were attributed to both reduced drainage outflow and enhanced denitrification in the controlled water table treatments. Mean PHOSPHOROUS concentrations in drainage water were reduced by 11.2% by the CWT treatments. Also mean electric conductivity in drainage water was lower than FD by the CWT treatments. In addition to significantly reduced NO3-N pollutions, economic benefits were achieved through fertilizer equivalent saving. Therefore, the practice of WATER TABLE MANAGEMENT in the region was demonstrated to be both environmentally and economically sustainable.

Cites

IMPACT OF SUBSURFACE WATER MANAGEMENT ON DRAINAGE WATER, CROP YIELD, ROOT DISTRIBUTION PATTERN, EVAPOTRANSPIRATION AND WATER USE EFFICIENCY (CASE STUDY: MAIZE-KARAJ)

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APA: Copy

NOURI, H., LIAGHAT, A.A.M., FARDAD, H., & CHAEICHI, M.R.. (2007). IMPROVED WATER QUALITY THROUGH WATER TABLE MANAGEMENT IN A SEMI ARID REGION OF IRAN. IRANIAN JOURNAL OF IRRIGATION AND DRAINAGE, 1(1), 41-48. SID. https://sid.ir/paper/131456/en

Vancouver: Copy

NOURI H., LIAGHAT A.A.M., FARDAD H., CHAEICHI M.R.. IMPROVED WATER QUALITY THROUGH WATER TABLE MANAGEMENT IN A SEMI ARID REGION OF IRAN. IRANIAN JOURNAL OF IRRIGATION AND DRAINAGE[Internet]. 2007;1(1):41-48. Available from: https://sid.ir/paper/131456/en

IEEE: Copy

H. NOURI, A.A.M. LIAGHAT, H. FARDAD, and M.R. CHAEICHI, “IMPROVED WATER QUALITY THROUGH WATER TABLE MANAGEMENT IN A SEMI ARID REGION OF IRAN,” IRANIAN JOURNAL OF IRRIGATION AND DRAINAGE, vol. 1, no. 1, pp. 41–48, 2007, [Online]. Available: https://sid.ir/paper/131456/en

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