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EARTHWORKS AND LANDSCAPE DESIGN FOR WATER
CONSERVATION
USING EARTHWORKS TO SAVE OUR TREES, RESTORE SOIL BIOLOGY , AND GROW
OUR FOOD
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• Edwin Marty—Local Food • Meredith Gray and Chris Sanchez—
Hugelkultur • Dick Peterson—Brad Lancaster and berms • Vincent Debrock—Capturing 100% of a 2”
storm on-site
TYING IT ALL TOGETHER—PREVIOUS 2015 PRESENTERS
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MAMA TREE THAT PROVED THE VALUE OF EARTHWORKS
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WATERSHED MANAGEMENT GROUP TRAINING CLASS, OCT. 2013
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EARTHWORKS ARE AN ANCIENT CONCEPT
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Images from Rainwater Harvesting for Drylands and Beyond by Brad Lancaster
LANDSCAPE LEVEL VERSION OF THE CCC BERMS
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THIS WILL BE YOUR RESULTS!
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RESIDENCE IN SW AUSTIN WITH LOCALIZED FLOODING ISSUE
#1
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BEFORE PHOTOS
ENGINEER’S SOLUTION: A CONCRETE DRAINAGE SWALE
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AFTER PHOTOS
ENOUGH STORAGE VOLUME WAS CREATED TO HOLD ALL THE NEIGHBOR’S RUNOFF FROM A 1” RAIN (APPROX. 3000 GALLONS)!
EMERGENCY SPILLWAY DIVERTS ALL EXCESS RUNOFF PAST THE FOUNDATION
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IT’S TIME FOR A PARDIGM SHIFT: INSTEAD OF LOOKING AT RUNOFF AS A PROBLEM, EMBRACE IT AS A RESOURCE!
THE HOMEOWNER PLANS TO INSTALL FRUIT TREES AND A VEGGIE GARDEN IN THE NEW RESERVOIR
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#2
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780 CFT OF STORAGE VOLUME CAPTURES ALL RAIN EVENTS OF 3” OR LESS (5000 GALLONS)
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2014- 2 MONTHS AFTER PLANTING
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2015
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FIG IS THRIVING FROM ROOF RUNOFF OF 120 GALLONS/INCH OF RAIN; ORANGE NEEDS TO BE MOVED A LITTLE HIGHER…PLACED ON SOUTH SIDE NEAR THE BUILDING FOR WARMER MICROCLIMATE
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#3
HYBRID EARTHWORKS/HUGELKULTUR/RAIN GARDEN
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EMERGENCY SPILLWAY WAS MOVED JUST PRIOR TO ‘MONSOON’ PERIOD
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RAIN GARDEN RECEIVES RUNOFF FROM 16X24 GREENHOUSE AND ADJACENT WOODS
EMERGENCY SPILLWAY
TOP OF BERM
FLOOR OF POND
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-TOP OF BERM IS 6” LOWER THAN GREENHOUSE BASE -EMERGENCY SPILLWAY IS 10” LOWER THAN GREENHOUSE BASE -RAIN GARDEN FLOOR IS 14” LOWER THAN GREENHOUSE BASE
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CITY OF SAN MARCOS LID MANUAL
THE MAJORITY OF RAIN EVENTS ARE SMALL. IF YOU CAN STORE THE 1” RAIN STORM, YOU WILL STORE 80% OF ALL RAIN EVENTS.
CITY OF SAN MARCOS LID MANUAL
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CALCULATIONS: AMOUNT OF RUNOFF THAT CAN BE CAPTURED IN A 1” RAIN * 210 GALLONS FROM THE GREENHOUSE ROOF + 1250 GALLONS FROM ADJACENT WOODS = 1460 GALLONS STORAGE VOLUME OF RAIN GARDEN 2 AREAS: UPPER AND LOWER POOL = 204 CFT 204 CFT X 7.48 GAL/CFT = 1525 GALLONS THIS RAIN GARDEN WILL CAPTURE THE RUNOFF FROM ALL STORMS OF 1” OR LESS
* ASSUME WET MOISTURE CONDITIONS; IF DRY, RUNOFF FROM THE WOODS WILL OCCUR ONLY IN A 4” OR GREATER RAINFALL
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LOCAL EXAMPLES • HOW MUCH RUNOFF CAN WE/SHOULD WE CAPTURE? • CRITICAL ELEVATIONS • BE AWARE OF THE CONCEPT OF INITIAL ABSTRACTION
WHEN FIGURING RUNOFF FROM PERVIOUS AREAS • ARMORED EMERGENCY OVERFLOWS • MAINTENANCE ISSUES • CONSIDER GROWING FOOD WITH THE CAPTURED WATER!!
PREVIOUS RAIN GARDEN IS SUPPORTING: • 3 POMEGRANATES • 1 DWARF PEACH • 1 LOQUAT • NUMEROUS HERBS • NATIVE PLANTS THAT PROVIDE HABITAT • EXISTING LARGE MATURE OAKS AND
BEAUTYBERRIES
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IF YOU CAN’T INSTALL EARTHWORKS, YOU CAN STILL CONSERVE WATER BY YOUR PLANT CHOICES
ECHINACEA AND SILVER PONYFOOT
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#4
JACOB’S WELL NATURAL AREA LANDSCAPE INSTALLATION—WATER CONSERVATION AND WILDLIFE HABITAT
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PLANTING DAY WITH THE HAYS COUNTY MASTER NATURALISTS
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RAIN GARDEN—GREGG’S MISTFLOWER AND BIG MUHLY
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INLAND SEA OATS AND MEALY BLUE SAGE ‘HENRY DUELBERG’
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TURK’S CAP—ALSO GREAT WITH INLAND SEA OATS
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DAMIANITA AND SKULLCAP
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MEXICAN PLUM—WONDERFUL FRAGRANCE; NICE IN COMBINATION WITH REDBUD
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FROGFRUIT
LYRE LEAF SAGE
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POINTS TO REMEMBER: • GROUP PLANTS ACCORDING TO
THEIR WATER AND SUNLIGHT NEEDS
• NATIVE PLANTS ARE NATURAL SURVIVORS, AND THEY PROVIDE NEEDED HABITAT FOR WILDLIFE
• ADD SOIL ORGANIC MATTER TO RETAIN MOISTURE
• INSTEAD OF FIGHTING WEEDS WITH CHEMICALS, CONSIDER OVERPLANTING WITH ASSERTIVE NATIVE PLANTS (INLAND SEA OATS, LYRE LEAF SAGE, TURK’S CAP, GREGG’S MISTFLOWER)
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