Evaluation of Synthetic Envelope for Subsurface Drains and Its Comparison with Granular Envelope Under Laboratory Conditions

Document Type : Research Paper

Authors

1 Former Graduate Student of Water Science Dept. , Shahid Chamran University

2 Professor, Water Science Dept., Shahid Chamran University

3 Assistant Professor, Water Science Dept, Shahid Chamran University

Abstract

The purpose of this research was to investigate and compare the performance of a synthetic drainage envelope material with a granular envelope material vastly used in drainage projects of the region. This study was conducted in the soil and water research laboratory of Chamran University. Upward flow cylinder infiltrometers was used in these experiments. Granular envelope was designed according to USBR recommenedations ,and synthetic the envelope used was PP450. Drain outlet discharge variation, soil-envelope hydraulic conductivity under fixed hydraulic head and gradient ratio (GR) in the two envelopes were measured and compared. The results of GR test indicated that clogging potential was greater in the synthetic envelope. In regard to hydraulic conductivity, the performance of both envelopes was acceptable and could be used as drainage envelope material satisfactorily. Under all hydrylic heads used in these experiments, drain outlet discharge for the granular envelope was higher than   synthetic envelope material

Keywords

References

  1. . ابن جلال، ر. و شفاعی بجستان، م،1371. اصول نظری و عملی مکانیک خاک، انتشارات دانشگاه شهید چمران اهواز.

    1. اکرم، م. 1381. نگرشهای جدید در طراحی زهکشی. مجموعه مقالات نگرشی بر مسایل و مشکلات مطالعات و اجرای زهکشی. انتشارات کمیتۀ ملی ابیاری و زهکشی ایران.
    2. پرتو اعظم، ر. و کشکولی، ح. 1380. فیلترهای بکار رفته در زهکش های زیرزمینی اراضی میان آب، ملاثانی، دانشگاه شهید چمران اهواز و واحد کشت و صنعت امیر کبیر در خوزستان، پایان نامۀ کارشناسی ارشد، دانشکدۀ مهندسی علوم آب، دانشگاه شهید چمران اهواز.

    4.حسن اقلی، ع. و رحیمی، ح. 1375. بررسی عملکرد فنی لوله های زهکش زمین بافته در مقایسه با  لوله های زهکشی رایج، پایان نامۀ کارشناسی ارشد، دانشکدۀ کشاورزی، دانشگاه تهران.

    1. علیزاده، ا.1376. زهکشی اراضی، انتشارات دانشگاه فردوسی مشهد.
    2. کمیتۀ ملی آبیاری و زهکشی ایران. 1383. مواد و مصالح سامانه های زهکشی.
    3. Ahmat, H. A., Seyfullah, H. O., and Tuncer, B.E. 2005. Constriction size of geotextile filter. Journal of Geotextile and  Geoenviromental  Engineering, Vol. 131, pp : 28-38.
    4. Dierickx, W. and Yuncuoglu, H. 1982. Factors affecting the performance of drainage envelope materials in structurally unstable soils. Journal of Agricuiltural Water Management, Vol. 5, pp : 215- 225.
    5. Giroud, J. P. 1996. Granular Filters and Geotextile Filters. Proceediings of Geofilter, Montreal, Canada, pp: 565 – 680.
    6. Giroud, J.P. 1988. Review of Geotextile Filter Design Criteria. First Indain Conference, Bombay, India, Dec. 1988, pp : 1-6.
    7. Hisn- Yu Shan, 2001. Effect of boundary condition on the hydraulic behavior of geotextile filteration system. Journal of Geotextile and Geomembranes, Vol.19, pp: 509- 527.
    8. Ingold, T.S., 1994. The Geotextiles and Geomembranes Manual, 1st edition, Published by

    Elsevier, Oxford, UK. 610 pp.

    1. Ingold, T.S and K.S. Miller, 1988. Geotextiles and Hand book, published by: Thomas Telford Ltd.152 pp.
    2. John, N.W.M., 1987. Geotextiles , Published by: Champan and Hall, U.S.A.347 pp.
    3. Koerner, R. M. Designing with Geosynthetics. 3rd edition, USA. pp : 1-313, 783.
    4. Sekendar, M. A. Entrance resistance of drainage enveloped pipes. Journal of Aricultural Water Management, Vol.5, pp: 351-360
    5. Skaggs, R.W. and Y.K. Tang, 1979. Effect of drain diameter opening and envelope on watertable drawdown, ASAE. PP: 326-333 .
    6. Vlotman, W.F. 1998. Agriculture envelope design laboratory testing. Reprinted from

    Filteration and Drainage Proceeding of  Conference American Society of Civil  Engineers. Pp : 18-21.

    1. Vlotman,W.F., Willardson, L.S. and Dierickx, W. 2000.Envelope design for subsurface drain. ILRI publication 56, 358 pp.

     

Iranian Journal of Soil Research
Volume 22, Issue 1
June 2008
Pages 113-125

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