Bioswale Filters Parking Lot Run-off for MS4 Compliance
Permeable Stabilized Crusher fine Running Path
Long Mow for Less Water Use and Maintenance: 38% Irrigation Reduction
Entrance Bridgeand Overflow Short Mow for Playability
Educational Rain Pavilionfor Monitoring and Weather Data
50,000 Gallon Cisterns to Supplement Bioswale Irrigation:Reduces Portable Water Use Departmental
MonitoringStudy Piers
Native Riparian Vegetation for Threatened Species Habitat
View ACentral Ave.
Section A
1”=4’ 1”=4’
1”=4’ 1”=4’
1”=4’1”=4’
3” Stabilized Crusher�neShrubBuffer
BioswaleTotal 18’
6” Concrete Sidewalk
Redondo Dr.
6’
6” Concrete CurbCentral Blvd. ‘A’ Parking LotTree Trench
6’ 40’ 14’
5” Mulch
18” Gravel Base
Uncompacted Soil
2’
ShrubBuffer
2’ 10’ 28’
6” Curb6” Curb
Long Mow-4”0.9% Slope-2”Drop
Short Mow-1.5-2” Field
18” Perforated PVC Pipe, Digitally Activated Valve, with fabric liner
24” HDPE Pipe
Single ‘C’ Inlet Per COA STD 2205
Single ‘C’ Inlet Per COA STD 2205
Double ‘C’ Inlet Per COA STD 2205 2% Slope2% Slope
Road Crown 12” Bio-Retention Soil
2% Slope 1.4% Slope
Flooding Downstream on Central Ave August 2, 2014 (Roberto E. Rosales/Albuquerque Journal)
Johnson gym
Expansion View ASection A
Redondo Dr.
‘A’ Parking Lot
DormitoriesJohnson gym
Johnson pool
1
2 8
9
10
11
1212
9
9
3
4
4
1315
14 16
5
7
6
d
JOHNSON FIELD (RE)CREATION INCORpORATINg gREEN INFRASTRuCTuRE AND HAbITAT INTO AN EDuCATIONAL RECREATION SpACE D14
Contaminated Rio Grande
Downtown Flooding
On-Campus FloodingImpervious Surfaces
UNM Watershed
Central Ave.
5198’
5182’
5109’
5171’
Site Plan Scale: 1”=150’
1. Initial planting filtration2. Main entrance bridge3. Bioswale filtration and riparian planting4. New 6’ sidewalk5. Educational rain pavilion6. Above ground educational cistern7. New hardscaped paths8. Foothills educational area9. Tree grove areas10. New bus bay for improve traffic circulation11. Added ADA entrance12. gateway pavilions13. Study piers14. Bioswale overflow to street15. Entrance bridge16. pedestrian table
Site Problems and Watershed Elevations Current Stormwater FlowContaminated and Excessive Run-off South of Field
Proposed Stormwater Flow
Existing and Proposed Parking Lot Run-off (cf)
Potable Water Use (acre-feet/year)38% Reduction in potable water use,
2-Year Storm (0.713in/1hr)
10-Year Storm (1.14in/1hr)
Existing Parking Lot Runoff (cu ft)
Proposed Parking Lot Runoff (cu ft)
Existing Conditions
Proposed Design
ear storm (0.713 in/1 hr) 10-year storm (1.14 in/ 1 hr)
26
70
20,000
15,000
10,000
5,000
0 0
10
20
30
40
50
60
Compliance Filtered Throughbioswale
while improving shade, habitat, air quality, safety, and accessibility
MS4 permit Run-off Reduced
Goals: Methods:1. Watershed based MS4 compliance2. Reduce flooding on campus and downstream3. Use less potable water for irrigation4. Create habitat for biodiversity
Capture infiltrate and filter stormwater run-off from parking lots in 475’ bioswale planted with native riparian vegetationNew sub-surface drip irrigation system Selection of native, drought adapted, and pollinator friendly plantsAdd 50,000 sq ft for habitat
Johnson Field11 Acres
Parking Lots 4.8 Acres
Johnson Gym
Central Ave. Central Ave.
2-year storm (0.713 in/ 10-year storm (1.14 in/ 100-year storm (2.05 in/ 1 hr)
Existing Parking Lot Runoff (cu ft) 11,398 18,224 32,771
Proposed Parking Lot Runoff (cu ft) 0 6551 21098
0
5,000
10,000
15,000
20,000
25,000
30,000
35,000
2-y 100-year storm (2.05 in/ 1 hr)
Existing and Proposed Runoff from Parking Lots
Existing Parking Lot Runoff (cu ft) Proposed Parking Lot Runoff (cu ft)
Potable WaNumber of Trees
Existing Conditions 60
Proposed Design 38
0
10
20
30
40
50
60
70
Existing Conditions Proposed Design
Potable Water Use (Acre-feet/year)
