Green Stormwater Infrastructure Site Suitability in the TTF Watershed - Philadelphia, PA

Page 1

Green Stormwater Infrastructure (GSI) Site Suitability TTF Digital Elevation Model (DEM)

General GSI Site Suitability TTF Hydrological Proximity Suitability

TTF Slope

TTF Land Use

General GSI Suitability Model

+ High Elevation To determine the suitability of GSI sites, the final map (shown far right) was generated by creating and overlaying the following raster analyses (shown right). The model (shown above) outlines the process of running this site suitability study. The following layers (not depicted) were also used in the creation of these raster images: -Philadelphia Hydrology -TTF Watershed Boundary -Philadelphia Land Use (shapefile)

1 - Steepest (Least Suitable) 2 3 4 5 - Flattest (Most Suitable)

Low Elevation

+ 1 - Furthest 2 3 4 5

6 7 8 9 10 - Closest

Residential Commercial Industrial Institutional Transportation

TTF General GSI Site Suitability

Structure-based GSI (Green Roof, Rain Barrel, Cistern) Site Suitability Model Addendum

Philadelphia TTF Watershed 5 Miles

1.25 0

2.5

Using the General GSI Site Suitability analysis, we can begin to target suitable locations for specific GSI measures based on additional information specific to each measure. GSI measures that are specific to stormwater runoff from buildings include green roofs, rain barrels, and cisterns. To determine the site suitability for these, the final map (shown far right) was generated by creating and overlaying the previously created General GSI Site Suitability map with the Building Size Suitability raster (shown right). The model (shown above) outlines the process of running this site suitability study. The following layers (not depicted) were also used in the creation of these raster images: -Philadelphia Buildings (shapefile)

Recreational Park/Open Space Water Vacant/Other

TTF Building Size Suitability

+

TTF Watershed within Philadelphia Approximately half of the Tookany/Tacony-Frankford Watershed is located within the city limits of Philadelphia, PA.

=

1 - Unsuitable 2 3 4 5

= 1 - Smallest 2 3 4 5

6 7 8 9 10 - Most Suitable

TTF Digital Elevation Model (DEM)

+ 1 - Steepest (Least Suitable) 2 3 4 5 - Flattest (Most Suitable)

Low Elevation

TTF Population Density By Census Tract

Data Credits: City of Philadelphia Philadelphia Water Department Map Drawn By: Alex Hoxsie. March 10, 2015

To determine the suitability of active recreation sites, the final map (shown far right) was generated by creating and overlaying the following raster analyses (shown right). The model (shown above) outlines the process of running this site suitability study. The following layers (not depicted) were also used in the creation of these raster images: -Philadelphia Census Tracts -TTF Watershed Boundary -Philadelphia Land Use (shapefile) -Philadelphia School Locations -Philadelphia Recreation Facility Locations

3

8

4

9

5

10 - Most Suitable

Structure-based GSI Site Suitability

1

6

2

7

3

8

4

9

5

10 - Most Suitable

Active Recreation Site Suitability

Recreational Park/Open Space Water Vacant/Other

+ 1 - Furthest 2 3 4 5

1 - Least Suitable

TTF Distance from Recreation Facilities

+ 6 7 8 9 10 - Most Dense

+ Residential Commercial Industrial Institutional Transportation

TTF Distance from Schools

Note: Population density was derived from the Philadelphia Census Tracts shapefile by using the field calculator to determine the number of people per unit of area in each tract.

1 - Least Dense 2 3 4 5

7

TTF Land Use

Active Recreation Site Suitability Model

High Elevation

2

2 Miles

.5

TTF Slope

6

6 7 8 9 10 - Largest 0

Active Recreation Site Suitability

1 - Unsuitable

6 7 8 9 10 - Closest

= 1 - Closest 2 3 4 5

6 7 8 9 10 - Furthest

6

2

7

3

8

4

9

5

10 - Most Suitable

2 Miles

.5 0

1 - Unsuitable

1

2 Miles

.5 0

1


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