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Information Journal Paper

Title

ASSESSMENT OF WATER TABLE DEPTH AND IRRIGATION WATER DISCHARGE ON DRAINAGE WATER QUALITY AND MIXING REGION UNDER DRAIN IN A LABORATORY MODEL

Pages

  122-132

Abstract

 Drainage water that flows to the subsurface DRAINs is compound of irrigation water and SALINITY ground water that causes many environmental problems. In this study a physical model from Plexiglas was made to investigate effect of WATER TABLE head on the MIXING DEPTH and DRAINage water quality. MIXING DEPTH is the outer flow path under the tile DRAIN. A saline water of K2MnO4 and NaCl were added to subsurface reservoir to simulate a ground water with 20 dS/m SALINITY. In the upper part of model a drip irrigation system was installed to apply water. WATER TABLE head is fixed by applying the constant irrigation discharge. The outer flow path was recorded on the Plexiglas side using a photograph. The results of this study indicated that by increasing the irrigation discharge, the WATER TABLE head in midpoint and MIXING DEPTH increases, so SALINITY of DRAINage water increases. The relationship between MIXING DEPTH and DRAINage water discharge reports as a power function. Finally MIXING DEPTH was obtained as a parabolic equation. MIXING DEPTH was introduced as a function of distance and WATER TABLE between two DRAINs. In comparison the SALINITY of DRAINage water with irrigation water the results showed that the great deal of DRAINage water is from ground water. Also the amount of salt that is carried by DRAINage water, after fixing WATER TABLE head, is depended to WATER TABLE head. The depth of leached zone with percolation flow increases when the WATER TABLE head increases. It is advised to reduce installation depth of DRAINs to decline WATER TABLE and mixing water depth and prevent outflow of SALINITY of lower depths.

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  • Cite

    APA: Copy

    SHAKIBA, M., LIAGHAT, A., & MIRZAEI, F.. (2013). ASSESSMENT OF WATER TABLE DEPTH AND IRRIGATION WATER DISCHARGE ON DRAINAGE WATER QUALITY AND MIXING REGION UNDER DRAIN IN A LABORATORY MODEL. IRANIAN JOURNAL OF IRRIGATION AND DRAINAGE, 7(2), 122-132. SID. https://sid.ir/paper/131666/en

    Vancouver: Copy

    SHAKIBA M., LIAGHAT A., MIRZAEI F.. ASSESSMENT OF WATER TABLE DEPTH AND IRRIGATION WATER DISCHARGE ON DRAINAGE WATER QUALITY AND MIXING REGION UNDER DRAIN IN A LABORATORY MODEL. IRANIAN JOURNAL OF IRRIGATION AND DRAINAGE[Internet]. 2013;7(2):122-132. Available from: https://sid.ir/paper/131666/en

    IEEE: Copy

    M. SHAKIBA, A. LIAGHAT, and F. MIRZAEI, “ASSESSMENT OF WATER TABLE DEPTH AND IRRIGATION WATER DISCHARGE ON DRAINAGE WATER QUALITY AND MIXING REGION UNDER DRAIN IN A LABORATORY MODEL,” IRANIAN JOURNAL OF IRRIGATION AND DRAINAGE, vol. 7, no. 2, pp. 122–132, 2013, [Online]. Available: https://sid.ir/paper/131666/en

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