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Last modified
8/16/2009 3:08:30 PM
Creation date
10/4/2006 7:04:22 AM
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Board Meetings
Board Meeting Date
9/13/2005
Description
OWCDP Section - Grant Request - HB 05-1254
Board Meetings - Doc Type
Memo
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<br />. <br /> <br />System owners are informed of their precipitation rate so that an appropriate and <br />efficient watering schedule can be deciphered and adjusted throughout the season <br />( see below). <br /> <br />Determine Soil Type and Root Depth: A soil sample is collected to determine <br />soil type and root depth. Soil type is categorized as clay, sand, loam or some <br />combination thereof. Soil type can affect the infiltration rate of water which <br />affects the frequency and duration that watering is needed. Root depth <br />measurements are also taken from a soil sample. System owners are informed that <br />healthy lawn roots should be a minimum of 6 inches deep. This is accomplished <br />by deep infrequent watering that greatly enhances a lawns ability to withstand <br />extreme temperatures and increased intervals between watering. Information on <br />amending clay soil to improve water- holding capacity is also provided during the <br />audit. <br /> <br />. <br /> <br />Provide an appropriate watering schedule: Using data collected during the <br />audit, an appropriate watering schedule is developed for the customer for their <br />current irrigation system. Watering intervals change throughout the season <br />because the water requirements change for plants as the seasons progress. <br />Through analysis of historic evapotranspiration (ET) data, average irrigation <br />pressure, and soil type, it has been determined that turf should be watered every <br />four days in May, every three days in June, July and August, every six days in <br />September and every ten days in October or until the end of the irrigation season. <br />The duration of watering should be kept the same, with only the intervals between <br />watering changing. <br /> <br />For areas with clay soil, cycling during watering is recommended. <br />The term cycling refers to running sprinklers repeatedly within an irrigation <br />interval to allow for better water absorption. Cycling allows roots to grow more <br />deeply into the soil profile, increases drought tolerance and disease resistance. <br /> <br />Example of a watering schedule for a spray zone with clay soil and a PR of <br />.9"/hr. <br /> <br />Month Times/week Cvcles Minutes Total Total <br /> Minutes per Minutes per <br /> waterina week <br />May 1.5 3 12 36 54 <br />June 2 3 12 36 72 <br />July 2 3 12 36 72 <br />August 2 3 12 36 72 <br />September 1 3 12 36 36 <br /> <br />. <br /> <br />6 <br />
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