Pests
Field Bind Weed (Convolvulus sepium)
Poison Hemlock (Conium maculatum)
Clean Water Services
Birdsfoot Trefoil (Convolvulus sepium)
Armenian Blackberry (Rubus armenicus)
Pests
English Holly (Ilex aquifolium)
Yellow Flag Iris (Iris pseudacorus)
Clean Water Services
Old Man’s Beard (Clematis vitalba)
Policeman’s Helmet (Impatiens balsamorhiza)
Pests
Herb Robert (Geranium robertianum)
Garlic Mustard (Alliaria petiolata)
Clean Water Services
Lesser Celandine (Ranunculus ficaria)
Yellow Archangel (Lamiastrum galeobdolon)
Pests
OSU Sea Grant
Pests
Herbicides
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Avoid if at all possible!
Follow the label directions carefully
Do not apply in standing water
Try to stay above water-line in facilities
Never apply when rain is forecasted
Apply during calm weather, cool weather
Herbicide use: discretion of local jurisdiction
Use herbicides only when a pest is
uncontrollable by other, less toxic
means.
Herbicides
• DON’T reach for herbicides at the first sign of a
pest, make a plan!
• DON’T apply herbicides directly to water in a
Water Quality Facility
• DO apply herbicides during dry weather (mostly
June-September)
• DO apply herbicides when a pest is uncontrollable
by other means
Irrigation
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EMSWCD
• Plants are critical to the function of LID facilities
• Irrigation is essential for plant establishment and health
Irrigation
• Irrigation especially important during establishment period
(approx. 2 yrs) (true for native plants as well)
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• Temporary irrigation fine for facilities with vegetation
that can handle OR’s dry summers
Pacific Sports Turf
Irrigation
High exposure areas can also require permanent
Irrigation
after the establishment period.
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• Areas near pavement
• Vast areas of minimal
shade or lots of
wind exposure
• areas prone to drought
or fire
EMSWCD
Irrigation
Water Efficiency
• Hand watering and drip type irrigation systems
P the most efficient irrigation methods.
are
• Adjusting the irrigation heads should be done as
needed to ensure water is not wasted on hard
surfaces.
• Avoid irrigating when the plants do not need
water.
Pacific Sports Turf
Irrigation
How to Irrigate
• Water must be applied in a manner that lets it
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percolate
into the soils and not run off the surface.
• Hand watering- Put as much down as possible until
water begins to migrate along surface. Then go to
the next plant.
Automated Systems
• Permanent
Pacific Sports Turf
• Temporary
• Utilize several short watering times or cycle/soak.
Irrigation for Plant Establishment
1st Year
Full irrigation schedule during the dry season to
ensureP good plant establishment.
2nd Year
Water less than previous year to encourage plants to
adapt to local climate.
3rd Year
Should be little need for irrigation.
Irrigation
Do:
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Irrigate heavily but infrequently
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Water in the early morning or evening
Automate if possible
Check automated systems weekly during the heavy
irrigation season
• Blow out any above ground system to winterize
Don’t:
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Allow runoff
Over water
Allow overspray
Irrigate when unnecessary
Soils
USDA
Soils
• Healthy soils hold
water, sediment, and
pollutants
• Too much sediment
(and compaction) will
clog the system
• Regular maintenance
will keep the facility
working as designed
City of Portland Environmental Services
Soils
City of Portland Environmental Services
Soils
Green Girl Land Development Solutions
Soils
City of Portland Environmental Services
Soils
Green Girl Land Development Solutions