Technical
Multi-use Trailer Three way discharge:
be removed. Slits and grooves are only functional so long as entry access at the top of a mini-drain is maintained in an open condition, allowing the surface water to easily get away. This means it becomes imperative to regularly apply sand dressing to the playing surface (Adams and Gibbs, 1974).
In practice, at the cost of in
the order of £3500 per pitch annually, this expenditure generally is out of reach for many schools, clubs and local authorities. This leads to an inevitable conclusion that no surface drainage system employing slit drains or grooves should be installed if regular sand dressings are not going to be undertaken. A final comment - following the difficulties experienced, and the effort made in topping up slit drains in the first year of establishment, thoughts have been directed to reducing the spacing of lateral drains to three metres and cutting out the installation of slit drains. Time will tell, but the
removal of collecting slits at right angles to the laterals reduces the potential for removing surface water - particularly if the laterals are installed down the steepest slope, probably the cross-
Literature cited
Adams, W.A. and Gibbs, R.J. 1994. Natural turf for sport and amenity. CAB International.p.102-156.
CIRIA, 2000. Sustainable urban drainage systems design manual. Construction Industry Research and Information. C522. p. 8, 74-77.
Davison, G. 2005. Personal communication FEH, 1993. Flood estimation handbook. Centre for Ecology and Hydrology. Wallingford. Jaaback, G. 2008. The role of water run-off on grassed sports pitches. Proc. 1st European Turfgrass Society Conference, Italy 19-20 May. P.99-100.
McIntyre, K. and Jacobsen, B. 1998. Drainage for sports turf and horticulture. Horticulture Agency Consulting. p. 64-69, 110.
Tindall, J.A. and Kunkel, J.R. 1999. Unsaturated zone hydrology for scientists and engineers. Prentice Hall. p. 367-368.
Waddington, D.V et al,1974. Soil modification for Turfgrass Areas. Progress Report 337. Pennsylvania State University.
FEBRUARY/MARCH 2013 PC 123
Rear: To a spinner for topdressing Front: Trench filling in view of the driver
Side: Filling of trenches, filling other machines, placing sand into bunkers, etc.
TRENCHERS
01787 311811
info@trenchers.co.uk www.trenchers.co.uk
gradient. However, by installing the close-spaced laterals, and following with grooving at right angles, this alternative system has much merit.
Though grooving is
narrower, being 20mm in width, the close spacing of 260mm apart makes this alternative a worthwhile consideration. On the downside, the effectiveness of these narrower slits under heavy wear, over time, is under question. Repeat treatments may well be needed within a few years.
Gordon Jaaback may be contacted at
gordonjbk@turfandgrass.com www.turfandgrass.com Tel: 01732 350351
AFT45 for compact
tractors from 20hp With chain or slitting wheel, augers or conveyor to quickly install drainage systems, pipes or cables as and when needed. Ideal for sports turf, agricultural, domestic and industrial markets.
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