maryland; creating a rain garden from start to finish - green schools
TRANSCRIPT
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
1/51
Sarah T. Hilderbrand Environmental ConcernSalena Garber Northba LLC
Concern Inc.
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
2/51
EC romotes ublic understandin and
stewardship of wetlands with the goal of im rovin water ualit and enhancin natures habitat. This is accomplished through wetland
outreach and education native s ecies horticulture, and the restoration, construction
and enhancement of wetlands.
Concern Inc. www.wetland.org
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
3/51
their attitudes and actions have a lasting impact , ,
people around them by using approved
and the outdoors as an integrating context.
www.northbayadventure.com
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
4/51
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
5/51
Im ervious Surfaces
&
the
Water
C cle
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
6/51
Reduced Water Quality
Pollutants, Sediment, Sewage
Loss of habitat and aquatic life ncrease oo ng
Decreased groundwater recharge Increased water temperatures
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
7/51
WetlandRain Barrel
Rain GardensGreen Roof
Paving
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
8/51
Rain Gardens are designed to
work in
much
the
same
way
as
natural wetland ecosystems they provide wildlife habitat, store and
filter stormwater and recharge underground aquifers.
Unlike wetlands, they allow water to infiltrate quickly into the ground instead of pooling on the surface.
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
9/51
A depressed landscaping feature that is
planted with
native
plants and
is
used
to
manage stormwater runoff from impervious surfaces.
created in a
collects storm water
less than 2448 hours.
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
10/51
Compared to a conventional patch of lawn, a
soak into the ground.
Recharge local and
Help to protect
flooding & drainage problems
Deep Roots
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
11/51
Enhancing the beauty of yards and
neighborhoods
and many beneficial insects
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
12/51
Act as a filter to help to protect streams and
lakes from
pollutants
carried
by
urban
stormwater.
Reduce lawns to be
Your ersonal contribution to
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
13/51
A Water Source/Inflow
Loose Soils
ppropr a e an s Mulch
ut ow cons erat ons (spillway, drain, underdrain)
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
14/51
Many guides available online. . . _ _ .
Remember these
are
guides,
not
rules!
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
15/51
Look for a site at least 10 feet from any
Pick a spot
that
will
collect
water
from
surroun ng sur aces.
Sunny gardens are preferable, though partial and full shade can be accommodated.
,
wiring, storage
tanks,
etc.)
and
trees.
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
16/51
Be wary of standing water indication of low soil permeability.
Avoid areas with high water tables or areas with
shallow soils over bedrock. Soil survey information from the Soil and Water
Conservation District will indicate these conditions.
htt ://websoilsurve .nrcs.usda.gov/app/
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
17/51
and desired function.
Notice any safety issues.
Attractive viewing spot?
Pick a low flat s ot. Stee slo es are not recommended.
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
18/51
Depth of pooling space depends on area
slope, and
available
space.
Slo es De th *Slope = rise
12% not recommendedThis refers to the depth of the ponding area (top of berm to soil base just below mulch layer).
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
19/51
Make a
soil ball,
squeeze test it.
an a crum es Silt ribbon 23 & very
smooth Cla ribbon >3 smooth
Soil Test from WOW! The Wonders of Wetlands Environmental Concern
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
20/51
1. Dig a small hole to a depth of 12
2. Saturate with water by filling and allowing to soak in.
3. Refill with water and measure how long it
4. If water soaks in within 48 hours = good
.5. If water takes much longer than 48 hours to sappear, so s may nee o e remove an
amended.
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
21/51
Size should be relative to the amount of runoff
expected, soil type and the slope of the land. A 2030% rule can often be followed. (Garden = roughly 2030% of drainage area)
o e erm ne e s ze, n a ou : Drainage area/Watershed
Garden depth/Pooling area Size of available space Soil type/Infiltration rate
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
22/51
Determine where water is coming from (roof
tops, across
lawns
or
driveways). And, how much of each surface drains toward
the garden?
Measure the area of the impervious surfaces that
will drain into your garden (roof, pavement)Do the same for the ervious sources rass .
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
23/51
If you have any trouble deciding where runoff
ows, watc a ra n storm n t e area. Base measurements on a 1 in. storm event to
account for a typical amount of rain.
Make sure that our arden can contain the water that will come from its watershed durin a storm of that size.
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
24/51
Rain Garden Size: Distance of < 10 ft. > 30 ft.
1. ___ = Distance from impervious surfacesSoil type 5" 6 7" 8" All Depths
Sand 0.19 0.15 0.08 0.03
Silt 0.34 0.25 0.16 0.06 10
2. ___ = Soil type
3. ___ = Drainage area
Clay 0.43 0.32 0.20 0.10
Size factor to multiply by Drainage Area to get garden area based on Soil type.
Silt
500 sq ft
4. ___ = Depth (from previous chart)
*Drainage area xsizing factor = rain
6
5. ___ = Size factor (see side chart)
gar en area
Garden = 10 x 12.5
0.25
6. ___ = Rain garden area* 125sq ft
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
25/51
Crescent, teardrop and bean shapes are
common but
not
required.
Shape should work with and enhance existing features and with your wishes.
and fits the landscape.
perpendicular to the runoff flow.
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
26/51
Desi nBegin with the
as cs.
Note where drainage
comes in and will go out.
Mark out swales, deep areas and berms.
http://hostedmedia.reimanpub.com/TFH/Step-By-Step/FH07APR_RAIGAR_02.JPG
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
27/51
Designs should have:
Temporary Ponding Area
Overflow Considerations Outlet(s)
An indication of topography changes
n a rac ve ayou
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
28/51
on ng rea6-12
Mulch 2-3
Loose soils(Tilled or
6-24
Gravel(if needed)
6-12
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
29/51
Call before you dig! www.missutility.net
Know your site to avoid surprises.
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
30/51
Volume = Surface Area x Depth in feetxamp e: o mu c nee e or sq t gar en
125 sq ft x (2/12 ft) = 20.8 cu ft .
Large orders will need to be in Cubic yards (= Cu ft/27ft)
(A yard = 3 so a cubic yard = 27)
Bulk materials are usuall more cost effective but for a small garden, bags might be easier to maneuver.
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
31/51
to a level depth with gradual slopes.
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
32/51
.
Often excavated material can be used to
create a berm or be used for other projects.
digging easier (or rent a sod cutter).
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
33/51
If using heavy machinery, try to avoid driving
over t e area e ng excavate , use mac nes that can dig from the edge.
Till the surface area 612 down if possible to
create loosest soils possible. If existing soils do not
, deeper and refill with
.
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
34/51
Determine which plants will do best in which locations within the garden.
http://www.wetland.org/nursery_home.htm
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
35/51
Sun
Soil
Salinit
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
36/51
Place plants according to their height range.
In general
avoid
large
trees.
Think about year round
interest: color, flowering
winter persistence, textures,.
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
37/51
appropriateness, availability, price, and the .
Learn to compare plant characteristicshttp://www.nps.gov/plants/pubs/Chesapeake/toc.htm
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
38/51
www.gardening.cornell.edu/homegardening/scene5d2e.html
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
39/51
Find the rate of spread for your plant: Slow,
, ,
Use this equation do determine the number o p ants:
(area for that plant) Ex: (30 sq ft)= 13 or 14 plants(1.5) 2
(rate of spread) 2 In general space herbaceous plants at least1 apart and give shrubs at least 3
Order plants as soon as possible.
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
40/51
Plantin Plants should be spaced according to their rate
of s read, enerall 12 feet a art forbs .
.
organic compost to help the plants establish.
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
41/51
with groups,
planted as to
and work .
Avoid compaction .
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
42/51
A Water Source
Loose Soils ppropr a e an s Mulch
ver ow cons erat ons
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
43/51
a n ar ens s ou e ow ma n enance.
watered to get established, but once the
their water from precipitation.
The garden will need periodic weeding and might call for mulch once twice per year.
Check inflow and outflow areas periodically.
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
44/51
easona y: Gardens will need new mulch about once or
twice per year (mulch should not touch
plants). Early spring is a good time to cut back
.
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
45/51
Signs can be a fun and educational addition to your garden.
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
46/51
Mosquitoes & Other insects Maintenance Weedin Permits/ Miss Utilities
. Questions?
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
47/51
These brochuresare available online
. .nursery_news.htm
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
48/51
Online Resources (Design) www.rainscaping.org/_ccLib/attachments/pages/Rain+
Gardens+Across+MD screen. df _
www.fairfaxcounty.gov/nvswcd/raingardenbk.pdf p: nr.w .gov runo rg rgmanua .p
http://learningstore.uwex.edu/pdf/GWQ034.pdf
www.deq.state.ok.us/pubs/lpd/edibleappends/raingardens.pdf
www.raingardens.org/docs/Create_A_Rain_Garden.pdf . . . .
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
49/51
Online Resources (Plants) www.wetland.org/nursery_news.htm
. . _
ownloads/PlantListPGDEP.pdf www. ow mpac eve opmen .org ra ngar en_ es gn
ownloads/PlantListDelawarDNRECMay2006.pdf
www. ow mpact eve opment.org ra ngar en_ es gnownloads/BayscapeBeneficialPlantsList.pdf
www.lowimpactdevelopment.org/raingarden_design/downloads/MD CoastalPlain 1.pdf
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
50/51
Education Director/ School ard Habitat S ecialist
Senior Educator/SchoolyardHabitat Coordinator
Environmental Concern
dir.educate wetland.or
North Bay [email protected]
410 745 9620 443.206.3064www.northbayadventure.com
-
8/3/2019 Maryland; Creating a Rain Garden from Start to Finish - Green Schools
51/51
Get facilities/maintenance on board early See approva s nee e
Involve as
many
students
as
possible
Educate!!!
Fund raising a ntenance p an espec a y summer