Post on 13-Aug-2020
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
80
70
60
50
40
30
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
✓
✓
✓+
✓
✓
✓+