Dam liners prices in Kenya for irrigation by Grekkon Limited vary annually by raw material cost. These dam liners will be installed on reservoirs, or water tanks. Their purpose is to prevent water loss through absorption by the soil surface.

Our dam liner material is high density UV treated geomembrane. UV treatment is to slow down degradation by the sun during external use. Grekkon Limited’s dam liners for sale in Kenya are categorised according to thickness

A small water reservoir for vegetable irrigation with a 0.5mm dam liner installed by Grekkon Limited in Emabungo area, Vihiga county. Notice the fence around it fo safety reasons

Dam Liner Prices in Kenya

Introducing the 1.5mm dam liner for Kes 780/M square all inclusive

Notes

• Welding cost applies when the liner required is wider than 8M
• Installation cost is charged when a Grekkon Limited technician installs the liner

Dam Liners Material Thickness Application

1. 0.5mm liners are for smooth surfaces without stones or rocks. It will work on a surface with murram. The life span is 8 to 12 years
2. 0.75mm liners are for rough surfaces with some stones or rocks. The lifespan is 15 to 20 years
3. 1mm liners are for stony or rocky surfaces. The lifespan is over 25 years

The choice of liner thickness is a factor of the liner size. A liner holding 10,000 cubic is thicker than one holding 500 cubic

Dam Liners Prices In Kenya

Processes Every Grower Should Know

I. How to calculate your dam liner size

• Measure your reservoir length (L), width (W) and depth (D) in meters
• Apply the formula; (L+2D+2) + (W+2D+2). This converts your 3D measurement to 2D

II. Steps to install your dam liner

• Clean up your reservoir floor to remove any debris that will perforate the liner
• Lay your liner at the center on the floor of the reservoir
• Spread it out to cover the entire floor, and the walls
• Make a trench 1M away from the edge of the reservoir, all around it
• The trench measure 30cm/ 1ft deep by 30cm/ 1ft wide
• Tuck your liner in this trench, then cover it with lots of soil

III. How To Weld Dam Liners

1. Factory welding. Depending on the dam liner size, weld it whole or partially in the factory. The weight and volume of the welded material must be easily portable on site.  The latter factor guides on how much of the dam liner material will be put together in the factory
2. Site  or field welding. This is done on site at the point of dam liner installation. It is the joining together of the partially welded dam liner pieces from the factory. Site welding is done when the entire dam liner could not be wholly put together in the factory. This is as a result of weight or bulkiness, which limits lifting and transportation of the bulky and heavy material. The weight size of the portable material depends on the thickness of the dam liner. The thicker it is, the less it is
3. A wedge welding machine or a heat gun/ heat blower is the equipment that does dam liner welding. A wedge machine is what does it in the factory. The heat gun is highly portable, and so is best for field joinery

Dam liner welding involves melting the liner material under high temperature at the point of joining them. Once melted, the 2 layers are laid one over the other and as they harden, become one unit

Factory wedge welding of a 1mm  thick dam liner

Joining 2 dam liner pieces with a heat gun

IV. How to Harvest Water Using Dam Liners

Factors to consider that will affect your dam liners prices in Kenya

a. Land size

The amount of water required for half an acre is less than that needed for 20 acres. The latter will harvest more water to irrigate the greater acreage, and the former will have less water harvested. The bigger the volume of water reserved, the larger the dam liner size

b. Location

The amount of rain fall is different in every climatic zone. Growers in the cool wet highlands have just a few dry months in the year, while farmers in the dry zones have more dry months than wet. In regions where the interval between rains is long, larger reservoirs are built for the same acreage as that in the cool wet location. Again, dry locations have very high  water loss through evaporation. In this case, it is advised to set up a shade net over the water reservoir to manage this water loss

c.  Ground Elevation

The farm gradient determines the location of the water pan. Some choose to have it at the lowest part so as to capture run-off water. If it is for crop irrigation, this water is either pumped uphill to a tank from where it flows back by gravity to the crop. Or it is pumped directly to the crop from the water reservoir. Others choose to locate the water pan on the highest point of the farm so that the water, through gravity flows out to the crop. In this case, the farmer does not retain run-off  rain water from the farm. On a flat terrain, irrigation water is physically pumped out to either a high storage tank for onward gravity flow to the crop. Or directly to the crop

A low reservoir that collects run-off rain water

d. Farming System

The size of the water pan will differ for irrigation, compared with aquaculture or livestock production

e. Crop Type

Some crops are more water demanding such as leafy vegetables, than others such as herbs. Then some crops  like onion are densely spaced while others are like avocado are sparsely populated in the farm. This will determine the water requirement

f. Irrigation System

Every irrigation system has it’s own unique water use. Drip irrigation conserves water while overhead irrigation through sprinklers or rain hose kits spends huge water volumes

g. Surface Texture

The surface texture of the water pan determines the dam liner thickness to install. For a smooth surface, a 0.5mm dam liner is ok. Where the surface is stony or rocky, then the 0.75mm or 1mm dam line is better