Test PB Collection: FTE

Water Source Sand media filters for an almond orchard Photo: Jack Kelly ClarkA water quality analysis can often predict the emitter clogging hazard. This can be especially useful if a microirrigation system is new or even in the planning stages.

Pressure compensating (PC) drip emitter Photo: Jack Clark Clogged drip emitters and microsprinklers result in a reduction or total elimination of water discharge from the emitter.

There are two methods that are frequently used to detect microirrigation system clogging. Either (1) you measure the system flow rate, or (2) you collect samples from the emission devices. In some locations, you may be able to get a professional irrigation system evaluation.

While preventing emitter clogging is often the most difficult maintenance task for microirrigation, there are other routine maintenance tasks. Click on the subject for more information.

Irrigation canal Photo: L SchwanklSurface water sources can be a microirrigation emitter clogging hazard due to particulate matter and/or organic matter in the water.

Groundwater well with sand separator Photo: L. SchwanklGroundwater sources present possible clogging hazards for microirrigation systems.

Sand media filters Photo: L. SchwanklSuspended particulate materials in irrigation water may be inorganic (sand, silt, and clay), organic (algae, bacteria, plant debris, fish, insect larvae, etc.) or any other floating or suspended materials.

...

Screen filter Photo: L SchwanklThe degree of filtration is expressed as mesh size or equivalent mesh size. The mesh size is the number of openings per inch. For example, a 200-mesh filter has 200 openings per inch.

Flushing of a drip tape lateral Photo: L. SchwanklPeriodic flushing is required to prevent clogging from sediments, particularly along the lower part of the drip line. A 200-mesh filter will not remove particles of fine sand, silt, and clay or fine particles of algae.