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How does Drain GaugeEms ll <br /> D <br /> measure the volume of logger <br /> Divergence <br /> drainage? Control Tube <br /> -DCT- Sampling <br /> ielectric water level monitor in the (Removable) <br /> S rin e <br /> center of the reservoir measures the - •. <br /> water level to 1 mm. There are no <br /> moving parts. <br /> • s — <br /> Vj <br /> What is the divergence •• + <br /> control tube? <br /> The divergence control duct assures + <br /> that soil moisture is neither lost nor ■Drain Gauge <br /> accumulated once the d147cm length(58in)ownwelling + <br /> soil water approaches the wick. • _ . <br /> Why the wick? • + I <br /> Wick <br /> The bottom of the divergence control • •® Sheath <br /> duct creates a boundary where the + '` <br /> k <br /> water will not move. By installing a <br /> wick at this location the wick creates a + •. +. . ®® <br /> Siphon R <br /> suction which facilitates the water Port <br /> vement down to the reservoir. <br /> Water <br /> Level Drain <br /> Gauge <br /> 10 0.4 <br /> o - Precipitation (cm) " <br /> $ al Cumulative infiltration (cm) <br /> Cumulative precipitation a 0.3 <br /> e <br /> C • <br /> C <br /> M 6 � <br /> c 0 <br /> 0 0.2 <br /> a <br /> a 4 a e a • ° v <br /> V e <br /> N a r CL <br /> CL + <br /> � 0.1 <br /> 2 + DECAGON <br /> v' 0.0 950 NE Nelson Court <br /> 0 <br /> 11/1 11/11 11/21 12/1 12/11 12/21 12/31 Pullman,Washington 99163 <br /> YEAR 2002 <br /> 800-755-2751 <br /> ■ Cumulative precipitation and infiltration measured <br /> above and below a turf grass. Precipitation and www.decagon/draingauge/ <br /> infiltration accumulation was started at the beginning draingauge@decagon.com <br /> of October. <br /> The graph shows how little an effect the rain had on fax 509-332-5158 <br /> the soil infiltration until it reached near saturation <br /> around the 15th of December. 02003 DECAGON <br /> Printed in USA <br />