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Knoll Acre Blueberries: A Sustainable Organic Production Project

Drip Irrigation

Our drip irrigation system is designed to enhance the sustainable use of water.  Our deep water well is not a strong one and so we are designing a water catch and containment system that will provide much of the water needed for irrigation purposes.

At the head of the organic blueberry plots is a 1600 gallon water storage tank that is connected to two outflowing irrigation system zones: (a) covers the first six organic blueberry rows and (b) covers the rest (8) organic blueberry rows.  For the most part, gravity flow from the water storage tank provides the propulsion for drip irrigation.  Water exiting from the storage tank passes through a filter and then through a meter valve that can be set to cut off when a speciffied amount of liquid is passed.

Dripworks designed our low pressure gravity based system by recommending the use of 3/4" main zone lines and 1/2" row feeder lines.  We have two emitter sizes: 4 gph (placed on the first six rows) and 2 gph (placed on the remaining 18 rows).  I initially prepared sketches of our blueberry plots along with estimates of the slopes.  The design folk at DripWorks engineered and selected the drip irrigation components that they will were most approprite.

Water Catchment and Storage

Our primary storage tank is a 1600 gallon tank (Norwesco Green Fresh Water Polyethylene Tank) from American Tank Company which cost $868 including fittings and shipping from California.  After constructing a flat pad with a pea gravel base in the side of the hill above the organic blueberry plots.

WaterTank

This water storage tank (1600 gallons) are the primary source of water for the organic plants.

WaterIrrigation_maincircuits

This photograph shows the control valves from the storage tank and leading to the two water treatment zones.

Irrigation_ControlValves

This photograph should the shut-off valve that is at the head end of each row.

 

Individual dripvalve at plantt

This photograph shows the drip line (0.5 inch) in relationship to the plant row.  Note the little green drip emitter located in the upper right quadrant of the photograph.

 

Related resources

Drip Irrigation
Water Catchment
Water Storage