These installations can vary from just a few thousand litres to many Mega litres and can service individual farmsteads which collect and store water for their own purposes to large regional communities which are serviced from massive holding dams and serviced through a system of surface canal networks and open channel reticulation systems.

Certain areas of the world such as sub-Saharan Africa and the areas immediately around the Mediterranean are experiencing reducing precipitation levels with much of what falls not being adequately directed for use into catchment zones. The net effect of which is that much is lost through surface runoff and erosion of prime agricultural areas before entering the River systems.

Water can sometimes be recovered by a system of pump and store where pumps are located in river courses on floating pontoons. The water is then pumped to lined storage ponds where it is settled before being re-applied to the land as irrigation feed.

Typically, Linings which fall into this category can be divided , but certainly not limited to the following application groups: Agriculture / Arable and Horticultural Holding dams and lagoons / Rose growers.

Enviro Seal can advise and recommend on the most cost-effective, safe and appropriate lining solutions to meet clients specific requirements. Contact Enviro Seal now for a fully professional service relating to advice on product selection, capability profiling and quotations for the supply and /or installation of lining solutions for specific projects.

The Enviro Dam – free standing portable dam

Yes indeed – there is no cheaper way to Store water and liquids and no easier way to contain liquids either for long term or short term and emergency use than the Enviro Dam.

This lightweight and freestanding Enviro Dam does not require brick or concrete walls, nor elaborate foundations and it is used without the extra cost and hassle of external mesh supports and wall reinforcement. The floor area simply requires a flat, smooth and horizontal surface as is the case with all liner applications – fill the dam and it is immediately ready to use!

Constructed in pre fabricated units of Durable / Non toxic / chemically inert Enviro linings which can be supplied in black or other colours on request, the Enviro Dam weighs no more than 50 kg each and can easily be managed by 2 people. There are no long –term corrosion problems also and every client can be assured of a lifetime of dependable and maintenance free service from the Enviro Dam.

This product is a winner all the way from farmers to firemen; Fish farmers to Construction workers; Householders to Drill riggers – Everyone has a use for this versatile and proven product.

The Enviro Dam is easily transported as it can be folded in half , strapped closed and fits snugly onto any medium sized “pick-up truck ”, whilst multiple units can be moved easily on flat bed trailers.

Individual Enviro Dams can easily be equipped with inlets / outlets / overflows / manifolds / lightweight covers and can be used in isolation or multiple units can be simply connected in series to increase total storage capacity.

Standard units come in a variety of sizes ranging from 0,5m deep x 2,0m diameter to the largest unit of 1,2m deep x 6m diameter ( This larger one giving a capacity of just under 30 000 litres allowing for a 150mm freeboard.

Typically, Linings which fall into this category can be divided , but certainly not limited to the following application groups: Aquaculture/ Pisciculture / Farm Holding Tanks / Irrigation tanks / Fire water Tanks / Liquid Fertiliser Holding dams / Sediment tanks for the construction industry / Drilling and Drill mud -slurry holding tanks.

Enviro Seal can advise and recommend on the most cost-effective, safe and appropriate lining solutions to meet clients specific requirements. Contact Enviro Seal now for a fully professional service relating to advice on product selection, capability profiling and quotations for the supply and /or installation of lining solutions for specific projects.

Canals

Canals are linear, shallow, sinuous excavations in the ground, used in the conveyance of liquids, principally water, as a means of liquid transfer from one stream course to another . Typical uses include river diversions and irrigation projects; laundering of effluents and stormwater control.

Water losses in canals through seepage have been satisfactorily reduced through the installation of relatively impervious geomembrane linings over the years . The costs of more traditionally accepted methods of seepage control as used in the past have become prohibitive for many canalisation projects.

In the context of canals, geomembrane linings are used to prevent flow either into or away from the canal section in order to:

• Prevent seepage loss into the surrounding ground
• Prevent outflow of effluent or liquid containment into the surrounding environment
  and
• Prevent inflow of effluents from the surrounding environments into natural water courses.
  

Geomembrane liners have traditionally been used in conjunction with the re-habilitation of old unlined canals, but are now being used more extensively in the construction of new canal sections either independent of or in conjunction with selected cover materials such as; concrete, interlocking blocks or reno mattresses.

The hydraulic performance of any geomembrane-lined canal will be influenced by the cross-sectional profile as well as the surface roughness and gradient of the canal along its flow length.

Those geomembranes which are best suited to canal construction techniques are those which are tough, durable and resist long term UV effects and heavy construction handling. They should be flexible, whilst exhibiting relatively low coefficients of thermal expansion/ contraction especially if cover materials are required directly above the lined sections.

Apart from being lightweight and easily transported,( a definite advantage where construction is required in remote or areas with difficult access) , the geomembrane lined-canal has other distinct advantages over more conventional designs - There is no requirement for formwork nor of construction joints in the system and no curing time. The liner is inert and resistant to most chemicals and liquid effluents. The system can withstand active soils and heaving clays and will still remain functional if covered with other flexible surface protection systems such as interlocking blocks.

Typically, Reservoirs which fall into this category can be divided , but certainly not limited to the following groups: Irrigation canals/ Solution canals and solution trenches./ River diversions works.

Enviro Seal can advise and recommend on the most cost-effective, safe and appropriate lining solutions to meet clients specific requirements. Contact Enviro Seal now for a fully professional service relating to advice on product selection, capability profiling and quotations for the supply and /or installation of lining solutions for specific projects.

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