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<br />r- <br /> <br />',~- ,1 <br />~:) <br />.-1 <br /> <br />-, <br /> <br />["-' <br />'- ..,) <br /> <br />C. Evaluation of data and water budget preparation. <br />1. Expected water penetration for each soil type in <br />the irrigated area. <br />a. Determine net irrigation for each irrigation event <br />from field data. Inflow minus outflow. EL-l & EL-2 <br />require calculations from instantaneous r,eading and length <br />of time. EL-3 and EL-4 require verificati~n of data recorded <br />in the field. <br />b. From soil surveyor field information gat!,ered during the <br />irrigation season determine soil water holding capacity to <br />crop maximum rooting depth. One crop to one rooting depth <br />per site monitored for each different net irrigation may <br />require 7 calculations. <br />2. Compare actual water penetration to expected. <br />Explain differences - basic data wrong? <br />a. Prepare a chart showing actual estimated depth of water <br />penetration from step 1 above with actual water penetration <br />beside this data. This will need to be done for each <br />irrigation event. <br />3. Ask soil scientist and engineer to assist in explaining <br />the differences and making adjustments. <br />4. Recheck intake values - run data for each irri,gation through <br />a TI-59 programmable calculator or computer. <br />5. Compare design intake values to actual data. Ask engineer <br />to help in making adjustments to properly design valve. <br /> <br />53 <br />