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Published byBenedict Reeves Modified over 9 years ago
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Certified Landscape Irrigation Auditor Training
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C.L.I.A. Training l Originally Developed by I.T.R.C. With a Grant From the California Department of Water Resources l Modified by the I.A. For Teaching Outside the State of California l Course Updated As of 3/10/00
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Class objectives: Students will be able to perform field tests on real systems Students will be able to identify problems that cause poor uniformity Students will be able to calculate an accurate watering schedule Students will be able to perform field tests on real systems Students will be able to identify problems that cause poor uniformity Students will be able to calculate an accurate watering schedule
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Important!Important! l You will need a calculator l Please turn off cell phones and pagers
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Today You Will: l Conduct your first audit l Develop your first watering schedule round l Start to get a headache at around 3:45 pm l Conduct your first audit l Develop your first watering schedule round l Start to get a headache at around 3:45 pm
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Tomorrow you will: l Review the concepts you learned today l Learn the final three steps of auditing l Conduct your 2nd audit (by yourselves!) l Calculate your 2nd schedule (by yourselves!) l Take your test and go home!
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Your Auditing Manual l Introduction l Site inspection and tune-up l Performing field tests l Calculating a schedule l Appendices: Auditing Drip, ET sources, tables and charts, blank worksheets l Introduction l Site inspection and tune-up l Performing field tests l Calculating a schedule l Appendices: Auditing Drip, ET sources, tables and charts, blank worksheets
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Software Package l Base Schedule Software –This is a simplified version that is easy use –It is based on the Base Schedule worksheet that you will do in class –Does all of the math for you –Other more in-depth software is available from ITRC
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Key Irrigation Auditor Actions l Identify Equipment Problems l Determine Actual System Performance Based on Uniformity Tests l Adjust Run Times According to Season l Fine Tune Stations to Exposures l Trim Back System to Minimize Water Use
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OPERATION Irrigation Audits l 1. Site inspection - system tune up l 2. System tests l 3. Calculate a Base Schedule
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OPERATION Irrigation Management l 4. Implement - adjust base schedule l 5. Track water use l 6. System maintenance
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Benefits of Scheduling l Water Savings = Money Savings l Healthier Turf l Reduced Chemical Use - Cleaner Environment l Less Strain on Distribution Systems
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How much money can be saved?
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Case Study #1 l Description: 152 ac. 7 Sites l Pre-Audit Water Use = 825,418 ccf (149.6 in.) l Post-Audit Water Use = 694,695 (125.9 in.) l Water Saved = 130,723 (23.7 in.)
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Case Study #1 cont. l Value of Water Saved 130,723 ccf X $0.46/ccf = $60,132 l Cost of Audits 152 ac. X $50/ac. = $ 7,600 l Net Savings $60,132 - 7,600 = $52,532
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Case Study #2 l Description: 180 ac. 36 Sites l Pre-Audit Water Use=401,769 ccf l Post-Audit Water Use=355,556 l Water Saved=46,213
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Case Study #2 cont. l Value of Water Saved 46,213 ccf X $1.72/ccf = $79,486 l Cost of Audits 180ac. X 108/ac. = $19,440 l Net Savings $79,486 - 19,440= $60,046
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This water savings is achieved by: l Checking and fixing equipment l Following the weather throughout the season l Maintaining the system at peak efficiency
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UniformityUniformity (NEVER PERFECT) GOOD UNIFORMITY Depth of Water POOR UNIFORMITY Depth of Water
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Station BeforeAfter 1 2 3 First Repair Equipment Balance Runtimes Between Stations Then Adjust Runtime According to Season Finally Trim Back to Save More JanDec 100% Site Trim = 1 JanDec Site Trim =.8 80% JanDecJanDec Turf Water Requirement Water Applied Average Amount Applied Turf Water Requirement
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Site Inspection Step one, get the system working right
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Site Inspection Priorities l Minor not major repairs l Low heads l Plugged heads l Bad adjustments l Tilted heads l No matched precipitation rate l Mix matched heads
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Data to Collect During the Site Inspection l Site conditions and micro-climates l Point of connection data l Controller data l Brand of products used l Current watering schedule
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Practice Session
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Matched Precipitation Rate (MPR) l Nozzle GPM is in proportion with the area covered l Watering time is in proportion with the area covered l You must verify during the site inspection l Can drastically alter the DU
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Break Time!
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Field Work Evaluating your systems
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Wind and Auditing l Do not audit if the wind is 8 mph or higher (unless the wind is always 8 mph or higher) l Use the upwind\downwind ratio to be sure l An anemometer can also be used to judge wind speed
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Audit Plan and Irrigation Test Areas (Sub-Areas) l Two types of test areas (sub-area) –Overlapping: more than one station in test area –Stand alone: single station in test area
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Identify Test Groups l Stand Alone l Overlapping Stand Alone Overlapping Sta. 1 Sta. 2
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Flag Stations
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Check System Pressure
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Irregular Geometry Station 1 Station 2 Station 3
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ITRC Cal Poly Detail "AT-A-HEAD" Placement RIGHT 5 10 15 20 25 50 75 100 125 150 175 200 WRONG 5 10 15 20 25 50 75 100 125 150 175 200 Offset Approx. 2 ft. PART CIRCLE HEADS LATERAL FULL CIRCLE HEADS R R R
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Collect Other Data During Station Runs l Spacing of Sprinklers: Head to Head, Line-to-Line l Test Soil Type and Rootzone Depth
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Spacing Measurement LINE-TO-LINE Station 1Station 2Station 3 Sprinkler SPRINKLER-TO-SPRINKLER SAMPLE Spacing Measurement: Triangular Spacing
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Testing Run Times (Min.) l How Long the Station Runs for Test l Affects Quantity of Water in Catchments l Spray Heads = 3-6 Minutes l Rotary Heads = 8-16 Minutes l Can Be Estimated from The Rotation Speed of the Sprinkler
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Field Work Hints l Set Up Ahead of Current Station l Always be Running a Station l Get Major Areas Done First l Radio Remote or Walkie Talkie l Assistance of Site Staff
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Audit Plan and “Linking Stations” l To Reduce Field Time, “Link” Stations if Possible l Untested Station Uses Results from a Tested Station l Link ONLY if the Following are Similar: –Equipment –Spacing –Pressures
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Let’s go get wet and dirty!
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