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Special Topics in Environmental Management
ENVM 8014 Special Topics in Environmental Management
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Order Number |
636738393092 |
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Type of Project |
ESSAY |
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Writer Level |
PHD VERIFIED |
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Format |
APA |
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Academic Sources |
10 |
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Page Count |
3-12 PAGES |
Instructions/Descriptions
ENVM 8014 Special Topics in Environmental Management
Module 1 Urban Tree Management -A Tree Survey Report (45%)
Appendix 1. Data extracted from “The Roadside Tree Survey and Community Participation Project” co-organized by the Conservancy Association and the Working Group of Urban Greening and Tree Management of Sham Shui Po District Council.
Table 1. Number of roadside trees recorded in Sham Shui Po District.
| Street | No. of Trees | Street | No. of trees |
| Yau Yat Chuen (area) | 209 | Ying Wa Street | 62 |
| Tat Chee Avenue | 174 | Cornwall Street | 60 |
| Hing Wah Street | 149 | Tai Hang Sai Street – Shek Kip Mei Estate | 55 |
| Sham Mong Road – Hoi Lai Estate | 150 | Tung Chau Street | 47 |
| Sham Mong Road – Fu Cheong to Hoi Lai Estate | 120 | Tai Hang Sai Street – Nam Shan Estate | 42 |
| Sham Mong Road – Fu Cheong Estate | 118 | Lai Hong Street | 41 |
| Cheung Sha Wan Road | 88 | Yen Chau Street/ West | 26 |
| Lai Wan Road | 88 | Mei Lai Road | 24 |
| Boundary Street | 84 | Tai Po Road | 24 |
| Tonkin Street | 82 | Po On Road – So Uk | 22 |
| Tonkin Street West | 79 | Yee Kuk Street | 16 |
| Sham Mong Road – Nam Cheong Park | 77 | Fat Tseung Street West | 11 |
| Nam Cheong Street | 76 | Cheung Fat Street | 7 |
| Sham Shing Road | 71 | Tai Hang Tung Street | 5 |
| Lai Chi Kok Road | 66 | Nam Cheong District Community Centre | 4 |
| Hoi Lai Street | 62 | Others | 249 |
| Total: | 2,388 |
Table 2. The quantity and percentage of the eight most abundant tree species (out of a total of 2388 trees) in the study.
| Species | Quantity | Percentage |
| Melaleuca cajuputi subsp. cumingiana | 275 | 11.52% |
| Roystonea regia | 201 | 8.42% |
| Aleurites moluccana | 158 | 6.62% |
| Tabebuia chrysantha | 145 | 6.07% |
| Xanthostemon chrysanthus | 142 | 5.9% |
| Bombax ceiba | 130 | 5.44% |
| Lagerstroemia speciosa | 122 | 5.11% |
| Archontophoenix alexandrae | 107 | 4.48% |
| Total | 1280 | 53.56% |
Table 3. Trees in different size classes (DBH) and growing stages.
| DBH | Quantity (%) | Tree species |
| <100mm
(Young Tree) |
463 (19.44%) | Xanthostemon chrysanthus, Tabebuia chrysantha, Terminalia mantaly |
| 100-200mm
(Semi-mature) |
881 (36.99%) | Xanthostemon chrysanthus, Tabebuia chrysantha, Lagerstroemia speciosa, Melaleuca cajuputi subsp. cumingiana, Aleurites moluccana, Archontophoenix alexandrae, Roystonea regia, Bombax ceiba |
| 201-500mm
(Mature) |
881 (36.99%) | Lagerstroemia speciosa, Melaleuca cajuputi subsp. cumingiana, Aleurites moluccana, Bischofia javanica, Chukrasia tabularis, Delonix regia, Archontophoenix alexandrae, Roystonea regia, Peltophorum tonkinense, Peltophorum pterocarpum, Ficus virens, Ficus microcarpa, Bombax cebia |
| 501-1000mm (Mature) | 150 (6.30%) | Melaleuca cajuputi subsp. cumingiana, Aleurites moluccana, Chukrasia tabularis, Delonix regia, Peltophorum tonkinense, Peltophorum pterocarpum, Ficus virens, Ficus microcarpa, Bombax cebi, Casuarina equisetifolia |
| >1000mm
(Mature, meet OVT requirement) |
7 (0.29%) | Ficus microcarpa |
Table 4. Overall health and structural conditions of the surveyed roadside trees.
| Condition | Heath problem (%) | Structural problem (%) |
| Good | 316 (13.2%) | 250 (10.45%) |
| Fair | 1805 (75.6%) | 1917 (80.28%) |
| Fair to poor | 133 (5.6%) | 129 (5.4%) |
| Poor | 115 (4.8%) | 92 (3.85%) |
| Dying | 18 (0.75%) | — |
| Died | 1 (0.04%) | — |
Table 5. Types and quantity of structural problems recorded among the surveyed trees.
| Structural problems | Quantity | Percentage |
| Obvious wound (by pruning, vehicle damages, etc.) | 341 | 14.28% |
| Codominant stems | 302 | 12.65% |
| Multiple stems | 146 | 6.11% |
| Poor crown form with abrupt branches | 65 | 2.7% |
| Girdling root | 30 | 1.26% |
| Crossing branches | 20 | 0.84% |
| Cavity | 12 | 0.5% |
| Severely topped | 4 | 0.17% |
Table 6. Sizes of tree pits and planters recorded in the survey.
| Width of tree pit/ planter (mm) | Quantity | Percentage |
| 400 – 600 | 280 | 11.73% |
| 601 – 1000 | 386 | 16.16% |
| >1000 | 1603 | 67.13% |
| Large planter | 119 | 4.98% |
Table 7. Records of poor pruning in this survey.
| Pruning | Quantity | Percentage |
| Excessive crown raising | 1154 | 48.32% |
| Pruned to abrupt bending | 404 | 16.92% |
| Heading | 340 | 14.24% |
| Stub pruning | 105 | 4.40% |
| Topping | 55 | 2.30% |
| Lion-tailing | 9 | 0.38% |
| Figure 1. Distribution of the surveyed roadside trees in Sham Shui Po District. |
| Fair: Sterculia lanceolata | Fair to poor: Bombax cebia | Poor: Delonix regia |
| Dying: Roystonea regia | Dead: Elaeocarpa apiculatus |
| Figure 2. Trees in different health conditions. |
| Figure 3. Examples of trees damaged by vehicles (pointed by red arrows). |
| Figure 4. Examples of mature trees growing in limited spaces. |
| Larger tree pit with young tree (replanting after typhoon damage) | Small tree pit with mature trees |
| Figure 5. Examples of pit planted trees. |
| Figure 6. 342 trees (14.32%) were found planted too deep (Invisible root flare pointed by red arrow) |
| Figure 7. Excessive crown raising (Red arrows indicating the pruning wounds) |
| Figure 8. Recurrent pruning caused abrupt bending branches and poor crown form. |
| Figure 9. Examples of stub pruning with bark tearing (red arrows). |
| Figure 10. Large pruning wound (Left) and topping wound (Right). |
| Figure 11. In the study, 198 tree tags out of a total of 286 tags were constricting the tree trunk (Left). Some trees have 3 to 4 tree tags (Right). |
| Embedded collar into tree trunk | Damaged supporting system | Supporting pole not removed | Supporting system left on the tree |
| Figure 12. In the study, supporting systems were seen on 323 trees and the supporting system of 264 out of 323 trees (81.73%) were outdated and should be removed. |
| Figure 13. One hazardous tree with poor rooting space and severe leaning was found at Nam Cheong District Community Centre. |
ENVM 8014 Special Topics in Environmental Management
