Understand How Drip Irrigation System Works

By Jayne Rutledge


Farmers prefer drip irrigation system over sprinkle and flood systems because it saves a lot of water. The water is dripped at the root area of the target plant through a network that controls the amount. Emitters are placed below the surface or drippers installed at the root. A network of pipes and tubes is used to deliver water into the rows.

Common names used to refer to this method of irrigating crops include localized, micro and trickle methods. Common features with this farming method are pipes and tubes of different sizes, valves and emitters. In addition to water, fertilizers and pesticides are delivered using the network. Direct delivery covers for the wastage that is witnessed with sprinkling or irrigating by flood.

Emitters were developed after it was noticed that the dripping holes drilled on the pipes were easily blocked by tiny particles. The emitters use velocity to control the amount of water released. The passage ways in this case are larger and longer. A pressurized source of water is required to supply it to the entire farm. It could be natural or be pressurized using a pump. Gravity can be used where the land is conveniently positioned.

Systems used to irrigate expansive areas require filtration to avoid blocking and clogging the pipes. The market has provided disc filters, media filters, screen filters and hydro cyclone for that purpose. Fertilizers and chemicals are also administered using the same network. There is need to install valves that prevent back flow which would contaminate water sources with chemicals used on the farm.

Each section requires a pressure regulator depending on water needs for each crop. It allows you to regulate the amount of water available to the plants. Electronic, hydraulic or hand operated safety valves are installed. An effective design is done by professionals who determine the sizes of pipes used at different sections. Poly-tubes are used to drop water at the root of the plant.

The pipes are connected using special accessories and poly fittings that are recommended by professionals in setting up of such systems. The devices that emit water include drippers or emitters of different sizes, inline driptubes or micro spray head. The choice of such device requires a professional analysis of the target plants, the soil, water requirement and the environment around the area. The operation of valves and pumps may be automatic or by hand.

Filters reduce the need to constantly address clogging of pipes. Water drawn from dams and rivers or recycled from municipal facilities contains particles and other contaminants that necessitate the use of filters. The filters are best fitted near drippers because these are the areas prone to clogging. Such attention will prevent the particles entering the system through the dripping holes from blocking the tubes.

Drip irrigation system is mandatory if a farmer uses recycled municipal water. There are regulations restricting water that is below certain standards from being sprinkled or flooded. The method is also used to deliver pesticides and other chemicals to the base of crops being irrigated. Research has show that this method is very economical with water and other farming chemicals. The amount of chemicals or fertilizer to be used is given by extension officers.




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