IRRIGATION: CONSTRUCTION & DEVELOPMENT OF A WELL

An irrigation well should penetrate the water-bearing formations as deep as needed to provide the required flow rate while maintaining costs within economical limits. In general, for small uses like irrigation of lawns and gardens, wells will not need to be as deep as wells for larger agricultural applications. A 4” well usually will supply enough water for a lawn irrigation system.

Florida water management districts provide standards and criteria for construction, repair and abandonment of wells. All wells within a district must comply with these standards, regardless of whether a permit for the well is required.

Water levels in the well may fluctuate during different seasons. In addition, the water level is lower during pumping due to the draw down effect. This level should be known to assure that the pump is able to lift the water at all times. For more information on annual cycles and long-term trends in water levels the water management district should be contacted.

A new well should be tested to obtain the relationship between capacity (discharge) and draw down within the well. The testing procedure involves pumping the well at various capacities or discharge rates and measuring the draw down in the well at each rate. Such information is necessary for the proper selection of a pump for a given well.

The contract for well drilling should include well development and testing, and it should be a written agreement between the prospective owner and the well driller.

For more information and charts go to: http://edis.ifas.ufl.edu/WI003
Irrigation of Lawns and Gardens. Dorota Z. Haman, Gary A. Clark, Allen G. Smajstrla. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Publication date: May 1989.For more information on well drilling and development see IFAS Circular 803, "Water Wells for Irrigation Systems