CITYGreen, a computer program, was used to evaluate the effects of tree growth on a variety of environmental conditions.  Below are the results showing the existing conditions and 30 years in the future, also the changes for the proposed redevelopment now and in 30 years.
 

Existing Conditions	Proposed Conditions
Site Statistics Total Area:       5.16 ac Number of Homes:  12 Canopy Area:      0.66 ac (13%) Grass Area:       4.04 ac (78%) Imperv Area:      0.14 ac (3%) Building Area:    0.33 ac (6%) Water Area:       ~ ac (~%) Hydrologic Soil:  C Percent Slope:    2.0 Pond Percent:     0 Rainfall Type:    II Precipitation:    4.00 in Runoff Volume:    2.03 in Tree Statistics............................ Tree Count:           45 Avg Health Class:     4.1 Avg dbh:              13.8 in Avg dbh Class:        1.7 Avg Ht Class:         1.8 Ownership (V|B|Unk):  91%|9%|0% Dominant Species:     SUM (16%) Number of Species:    14 Carbon Benefits............................ Carbon Storage:        29.07 tons Carbon Sequestration:  0.05 tons/yr Pollution Removal Benefits................. Ozone:                $77.53 (25.3lbs) SO2:                  $5.48 (7.3lbs) NO2:                  $49.11 (16.0lbs) PM10:                 $41.55 (20.3lbs) CO:                   $0.82 (1.9lbs) Energy Benefits............................ Total Savings:        $60.50 Savings per Home:     $5.04 Total KWH Savings:    504.2 KWH Savings per Home: 42.0 Stormwater Benefits........................ Runoff Reduction:       7.7% Time of Concentration Increase: 6.9% Peak Flow Reduction:    11.3% Storage Volume (trees removed): 3167 cubic feet	Site Statistics Total Area:       5.16 ac Number of Homes:  33 Canopy Area:      0.67 ac (13%) Grass Area:       3.74 ac (72%) Imperv Area:      0.43 ac (8%) Building Area:    0.33 ac (6%) Water Area:       ~ ac (~%) Hydrologic Soil:  C Percent Slope:    2.0 Pond Percent:     0 Rainfall Type:    II Precipitation:    4.00 in Runoff Volume:    2.11 in Tree Statistics............................ Tree Count:           51 Avg Health Class:     3.8 Avg dbh:              0.0 in Avg dbh Class:        2.1 Avg Ht Class:         2.0 Ownership (V|B|Unk):  96%|4%|0% Dominant Species:     SUM (18%) Number of Species:    13 Carbon Benefits............................ Carbon Storage:        29.50 tons Carbon Sequestration:  0.05 tons/yr Pollution Removal Benefits................. Ozone:                $78.64 (25.6lbs) SO2:                  $5.55 (7.4lbs) NO2:                  $49.81 (16.2lbs) PM10:                 $42.15 (20.6lbs) CO:                   $0.83 (1.9lbs) Energy Benefits............................ Total Savings:        $60.50 Savings per Home:     $5.04 Total KWH Savings:    504.2 KWH Savings per Home: 42.0 Stormwater Benefits........................ Runoff Reduction:       7.7% Time of Concentration Increase: 7.2% Peak Flow Reduction:    11.3% Storage Volume (trees removed): 3288 cubic feet

 

Existing in 30 Years	Proposed in 30 Years
Site Statistics Total Area:       5.16 ac Number of Homes:  12 Canopy Area:      1.72 ac (33%) Grass Area:       2.97 ac (58%) Imperv Area:      0.14 ac (3%) Building Area:    0.33 ac (6%) Water Area:       ~ ac (~%) Hydrologic Soil:  C Percent Slope:    2.0 Pond Percent:     0 Rainfall Type:    II Precipitation:    4.00 in Runoff Volume:    1.92 in Tree Statistics Tree Count:           40 Avg Health Class:     0.0 Avg dbh:              18.1 in Avg dbh Class:        2.1 Avg Ht Class:         3.0 Ownership (V|B|Unk):  0%|0%|100% Dominant Species:     SUM (18%) Number of Species:    12 Carbon Benefits Carbon Storage:        76.05 tons Carbon Sequestration:  0.13 tons/yr Pollution Removal Benefits Ozone:                $180.12 (58.7lbs) SO2:                  $13.69 (18.2lbs) NO2:                  $103.29 (33.7lbs) PM10:                 $103.92 (50.7lbs) CO:                   $2.92 (6.7lbs) Energy Benefits Total Savings:        $114.58 Savings per Home:     $9.55 Total KWH Savings:    954.9 KWH Savings per Home: 79.6 Stormwater Benefits Runoff Reduction:       18.9% Time of Concentration Increase: 19.3% Peak Flow Reduction:    26.6% Storage Volume (trees removed): 8347 cubic feet	Site Statistics Total Area:       5.16 ac Number of Homes:  33 Canopy Area:      1.20 ac (23%) Grass Area:       2.71 ac (53%) Imperv Area:      0.43 ac (8%) Building Area:    0.83 ac (16%) Water Area:       ~ ac (~%) Hydrologic Soil:  C Percent Slope:    2.0 Pond Percent:     0 Rainfall Type:    II Precipitation:    4.00 in Runoff Volume:    2.20 in Tree Statistics Tree Count:           48 Avg Health Class:     0.0 Avg dbh:              8.9 in Avg dbh Class:        1.4 Avg Ht Class:         2.9 Ownership (V|B|Unk):  0%|0%|100% Dominant Species:     RDB (17%) Number of Species:    12 Carbon Benefits Carbon Storage:        38.56 tons Carbon Sequestration:  0.87 tons/yr Pollution Removal Benefits Ozone:                $140.95 (45.9lbs) SO2:                  $9.96 (13.3lbs) NO2:                  $89.27 (29.1lbs) PM10:                 $75.54 (36.9lbs) CO:                   $1.48 (3.4lbs) Energy Benefits Total Savings:        $346.50 Savings per Home:     $10.50 Total KWH Savings:    2887.5 KWH Savings per Home: 87.5 Stormwater Benefits Runoff Reduction:       13.0% Time of Concentration Increase: 14.0% Peak Flow Reduction:    17.9% Storage Volume (trees removed): 6148 cubic feet

Comparisons
For the existing conditions, when projected 30 years into the future, a few trees died.  However, the stormwater benefits increased, energy savings increased, pollution removal benefits increased as well as carbon benefits.  The same is true when the proposed changes were projected 30 years into the future.  Some trees died but carbon benefits increased, stormwater benefits increased, energy benefits as well as pollution removal benefits.

To compare the existing conditions with the proposed changes gives a better indication of the effect of the redevelopment project. The current scenario shows an increase in both the number of buildings and trees in the proposed changes.  Carbon benefits and pollution removal are both slightly higher in the proposed conditions.  The energy benefits are identical and the stormwater benefits are similar.  So, if the development is built, there is no immediate or significant change in environmental qualities.

When comparing the existing conditions and the proposed changes 30 years in the future, some differences are noticeable.  The majority of these results indicates that 30 years into the future the environmental conditions improved, as the tree canopy grew.  The proposed conditions did not fair as well compared to the existing conditions.  However, energy benefits are larger with the proposed conditions.  These results are not too surprising since the proposed conditions add 21 buildings and some impervious surfaces.  However, the differences are not hugely significant in the overall picture of the environmental quality of the area.  The development does not have a negative effect on the environment.
 

Conclusion
A comparison of the existing conditions to the proposed conditions now and 30 years in the future was run using CITYGreen software.
The results indicate that as tree canopy grows over time, so do the environmental benefits. This was true for both the existing
conditions and the proposed conditions.  When the existing conditions were compared to the proposed conditions currently, the results
were fairly similar, this indicates there would be no negative or positive effect of the proposed redevelopment project.  Comparing the
conditions 30 years into the future the proposed conditions did not fair as well compared to the existing conditions.  These results are
not too surprising since the proposed conditions add 21 buildings and some impervious surfaces.  However, the differences are not
hugely significant in the overall picture of the environmental quality of the area.  The development does not have a negative effect on
the environment.
 

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