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Dar es Salaam International Airport Terminal III

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Dar es Salaam International Airport Terminal III

  1. 1. Three roundabouts with large Baobab trees and feature gardens of Tecoma, Oleander and Hibiscus PROJECT SITE PLAN Roadway margins or side strips planted with Ixora, Hamelia, Tabernaemontana, Allamanda Roadway median strips planted with Delonix regia trees and Dianella ground cover Open area with native trees in a meadow planting with Bermuda grass COLOUR KEY Landscape elements Forecourt and esplanade - Palms or architectural Bougainvillea-clad ‘’trees’’ These plantings must be like thick hedges to stop pedestrian movement These plantings must be like thick hedges to stop pedestrian movement These plantings must be like thick hedges to stop pedestrian movement CROSS- SECTION E-E CROSS- SECTION A-A CROSS- SECTION F-F
  2. 2. CARRIAGEWAY CROSS-SECTIONS: CARRIAGEWAY MARGIN CARRIAGEWAY CENTRAL MEDIAN CARRIAGEWAY MARGIN
  3. 3. TREES: the Baobab tree (Adansonia digitata) for roundabouts and the spectacular Flamboyant (Delonix regia) for roadway median strips:
  4. 4. Understorey plants for roundabout feature gardens under Baobab trees for the three roundabouts: Tecoma stans Oleander sp hybrids Hibiscus rosa- sinensis hybrids Duranta repens ‘Gold’ Calotropis gigantea
  5. 5. ROUNDABOUT CROSSINGS: Option 1 Approximate roof profile depths Approx. 2m spacing Approx. 3m spacing Approx. 1.5m spacing Approx. 0.5m spacing Mulch to 150mm depth Overall height > 6m when planted Overall height < 2.2m when mature WARNING: IF CLEAR LINE OF SIGHT ACROSS ROUNDABOUT IS REQUIRED UNDERSTOREY PLANTS WOULD BE OMITTED (See OPTION 2) OPTION 1: TROPICAL PLANTS SECTIONAL VIEW ROADWAY
  6. 6. 8 x Nerium oleander used in the next ring of plants interspaced and in front of the Tecoma 6 x Tecoma stans planted around base of Baobab 160 x Duranta repens gold used as edging plant around the roundabout perimeter 120 x Crown Flower plant Calotropis, with its gold and green leaves and shade tolerance used as a flowering and foliage ‘’filler’’. Grows to 3m height when pruned. Flowers profusely all-year round. Drought tolerant. Large baobab (approx.10m) trees are readily moved and replanted Oleander is a strong vigorous plant that is drought tolerant and hardy. It flowers all-year round and can be pruned to height to accompany the Tecoma. 60 x red Hibiscus interplanted with Calotropis ROUNDABOUTS DETAIL OF PLANTING SCHEME It occurs naturally in Tanzania and is drought tolerant Hibiscus is dry-tolerant and needs only pruning and limited water to flower throughout the year Fast-growing and hedges well with bright foliage NOTE The soil will be covered with compost and bark chips for final appearance and water conservation 1 x Adansonia digitata in centre of roundabout
  7. 7. ROUNDABOUT CROSSINGS: Option 2 OPTION 2: SAVANNAH PLANTS SECTIONAL VIEW The advantages of this planting scheme are: shape, colour, ease of maintenance and clear line of sight across roundabout Hybrid aloes in mass planting Tabernaemontana (1.8m height) and Allamanda (1m height) combination Hamelia (1.8m height) and Ixora (1 m height) combination Mulch
  8. 8. Carriageway Median Strips: Rusellia equisetiformis to 1m height (centre) and Dianella to 50cm height (border) Delonix regia To maximum height of 6-7m Roadway: vehicles illustrate scale Plant roots to be restricted by growing bags or concrete ‘’box’’ Grass cover all areas not cultivated to plants in median strips Mulch The planting scheme is easy to maintain and control, as Delonix are easy to prune and best managed by annual branch doctoring; Rusellia can be cut back to ground level to rejuvenate as required; Dianella can be thinned All plants are dry-tolerant and flower well
  9. 9. 2020 m Roadway surface Roadway surface Rusellia is a fast- growing succulent that flowers throughout the year and very hardy and dry-tolerant Rusellia equisetiformis in a centre row along the island Dianella intermedia planted with the Rusellia along the outer margins ROADWAY MEDIANS: PLANTING SCHEME Dianella is a grass-like plant that grows by clumping and is extremely hardy and dry- tolerant and is very attractive when used with Rusellia Delonix regia for centreline planting at 25m intervals
  10. 10. Plantings along the carriageway median strips under & between Delonix regia trees: Rusellia equisetiformis Dianella intermedia ‘Variegata’
  11. 11. Carriageway margins: tropical hedge planting Cross- section A-A Cross- section A-A naemontana m height) and llamanda m height) mbination Hamelia (1.8 height) and Ixora (1 m height) combination Planting schemes A and B alternates on each side of the road Design A Design B
  12. 12. Road pavement Hamelia shrubs alternataing with the Tabarnaemontana Tabernaemontana and Hamelia planted at the back of the hedges along sides of roads Allamanda interplanted with Ixora along front of roadways Ixora alternating with Allamanda in front of hedge All garden shrubs like these require regular pruning after short and long rains. Pruning thickens shrubs and improves flowering ROADWAY PERIMETERS PLANTING SCHEME NOTE The soil will be covered with compost and bark chips for final appearance and water conservation Planted at 1m spacing Planted at 2m spacing
  13. 13. Plants for carriageway margins/side strips (left and right sides of approach roads): Allamanda cathartica Ixora javanica Hamelia patens Tabernaemontana divaricata
  14. 14. Forecourt Promenade: ARRIVAL & DEPARTURE PROMENADE PLAN & SCHEMATIC VIEWS
  15. 15. Dramatic architectural ‘’tree’’ stands proposed for the forecourt and esplanade: Bougainvillea brasiliensis ‘Raspberry Ice’ for planting on the structures: Every tree stand will have a different variety of bougainvillea or species of climber providing a spectacular range of forms and colours throughout the year
  16. 16. Esplanade Forecourt bougainvillea stands: Overall height 6m + 1.5m Anchor bolts Individual arms bolted at neck Structure design leaves interior hollow for plants ELEVATION SECTION Span 7m Span 7m Braces and support for foliage All plant support elements pre- fabricated & bolted on site Soil-filled planting box Plant climbing rings every 1m Climbers are fast-growing and will colonise these structures rapidly Constructed in stainless steel or galvanised steel DESIGN ELEMENTS

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