Overview of Green Infrastructure

Techniques

University of New Hampshire Stormwater Center

2015

Bioreten on System Designs & Data

Water Quality Performance Data Hydraulic Performance Data

© 20 . University of New Hampshire Stormwater Center. All Rights Reserved.

6” Perforated standpipewith 1” orifice plate

12” Perforated riserw/solid cap (CPv overflow)

Geotextile on wallsof excavation

12” 3/4” Crushed stone

4” 3/8” Pea gravel 6” Perforated subdrain

30” Bioretention soil mix

12” Qv bypass

12” Pipe

Not drawn to scale,vertical exaggeration

Riprap pad

Impervious surface

Cross section of72” diameter concrete vault

12” Overflow pipe

Vegetationcentered in treatment

Native soils

Qv conveyance protection bypass

Mound 6” bermaround tree filter rim

100

90

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20

10

0

BioretentionTree Filter

Bioreten on Report Card

© 201 . University of New Hampshire Stormwater Center. All Rights Reserved.

targetuop “grade”category

hydrologic

physical

chemical

biological

flow altera on

volume reduc on

sedimenta on

enhanced sedimenta on

filtra on

microbial

vegeta ve

sorp on

divert flow

sediment

sediment

sediment

nitrogen

nitrogen phosphorus

phosphorus

✓

✓

✓

✓

✓—

✓

✓—

Tree Filter Report Cardtargetuop “grade”category

hydrologic

physical

chemical

biological

flow altera on

volume reduc on

sedimenta on

enhanced sedimenta on

filtra on

microbial

vegeta ve

sorp on

divert flow

sediment

sediment

sediment

nitrogen

nitrogen phosphorus

phosphorus

✓

✓

✓

✓

✓—

✓

✓—

Hydrodynamic Separators Design & Data

Water Quality Performance Data Hydraulic Performance Data

© 201 . University of New Hampshire Stormwater Center. All Rights Reserved.

100

90

80

70

60

50

40

30

20

10

0

The effect of T and [Cl-] is tonearly double the settling time

from 1.6 to 3.4 cm/sec

© 201 . University of New Hampshire Stormwater Center. All Rights Reserved.

Hydrodynamic Separator Report Card

targetuop “grade”category

hydrologic

physical

chemical

biological

flow altera on

volume reduc on

sedimenta on

enhanced sedimenta on

filtra on

microbial

vegeta ve

sorp on

divert flow

sediment

sediment

sediment

nitrogen

nitrogen phosphorus

phosphorus

✓—

✓

Reten on Pond Design & Data

100

90

80

70

60

50

40

30

20

10

0

Water Quality Performance Data Hydraulic Performance Data

© 201 . University of New Hampshire Stormwater Center. All Rights Reserved.© 201 . University of New Hampshire Stormwater Center. All Rights Reserved.

Reten on Pond Report Card

targetuop “grade”category

hydrologic

physical

chemical

biological

flow altera on

volume reduc on

sedimenta on

enhanced sedimenta on

filtra on

microbial

vegeta ve

sorp on

divert flow

sediment

sediment

sediment

nitrogen

nitrogen phosphorus

phosphorus

✓

✓

✓

Porous Pavement Design & Data Water Quality Performance Data

Hydraulic Performance Data

© 201 . University of New Hampshire Stormwater Center. All Rights Reserved.

Sand/gravel (filter course)

6” Perforated subdrain

Native soils

18”

4”

Please subbaseand drasoils.

4”

4”

Porous concrete

3/4” Stone choker course

3/8” Stone infiltration resevoir

100

90

80

70

60

50

40

30

20

10

0

‘

© 201 . University of New Hampshire Stormwater Center. All Rights Reserved.

Porous Pavement Report Card

targetuop “grade”category

hydrologic

physical

chemical

biological

flow altera on

volume reduc on

sedimenta on

enhanced sedimenta on

filtra on

microbial

vegeta ve

sorp on

divert flow

sediment

sediment

sediment

nitrogen

nitrogen phosphorus

phosphorus

✓

✓+

✓+

✓+

✓+

Stormtech Isolator Row Design & Data

Water Quality Performance Data Hydraulic Performance Data

© 201 . University of New Hampshire Stormwater Center. All Rights Reserved.

100

90

80

70

60

50

40

30

20

10

0

Inspection portlocation per engineer’s drawingNon-woven geotextile

Woven geotextile

Crushed stone

Cover entire row with non-woven geotextile

HDPE open-bottom vaulted chambers

6” Perforated subdrain

24”minimum sump

Catchbasin or manhole

12” Qv bypass

Stormtech Report Card

© 2010. University of New Hampshire Stormwater Center. All Rights Reserved.

targetuop “grade”category

hydrologic

physical

chemical

biological

flow altera on

volume reduc on

sedimenta on

enhanced sedimenta on

filtra on

microbial

vegeta ve

sorp on

divert flow

sediment

sediment

sediment

nitrogen

nitrogen phosphorus

phosphorus

✓

✓

✓

✓

✓

Swales Design & Data

Water Quality Performance Data Hydraulic Performance Data

© 201 . University of New Hampshire Stormwater Center. All Rights Reserved.

2 ft.

Filter corestone and woodchip blend 50:50

Outer stone casing 6 to 8” stone

Vegetated swale with berm Berm cross-sec on

100

90

80

70

60

50

40

30

20

10

0

Stone SwaleVeg Swale

Berm Swale

Swale Report Card (Berm)

© 201 . University of New Hampshire Stormwater Center. All Rights Reserved.

targetuop “grade”category

hydrologic

physical

chemical

biological

flow altera on

volume reduc on

sedimenta on

enhanced sedimenta on

filtra on

microbial

vegeta ve

sorp on

divert flow

sediment

sediment

sediment

nitrogen

nitrogen phosphorus

phosphorus

✓

✓

✓—

✓—

Gravel Wetland Design & Data

Water Quality Performance Data Hydraulic Performance Data

© 201 . University of New Hampshire Stormwater Center. All Rights Reserved.

12” Qv bypass

6” Subdrain24” of 3/4” Crushed stone

Not drawn to scale,vertical exaggeration

8” Wetland soil

Native soils

12” Pipe inlet fromsedimentation forebay

6” Perforatedriser pipe

CPv overflow

100

90

80

70

60

50

40

30

20

10

0

© 201 . University of New Hampshire Stormwater Center. All Rights Reserved.

Gravel Wetland Report Card

targetuop “grade”category

hydrologic

physical

chemical

biological

flow altera on

volume reduc on

sedimenta on

enhanced sedimenta on

filtra on

microbial

vegeta ve

sorp on

divert flow

sediment

sediment

sediment

nitrogen

nitrogen phosphorus

phosphorus

✓

✓

✓+

✓

✓

✓+