dar es salaam international airport terminal iii
TRANSCRIPT
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 KEYLandscape 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
CARRIAGEWAY CROSS-SECTIONS:CARRIAGEWAY
MARGINCARRIAGEWAY
CENTRAL MEDIAN
CARRIAGEWAY MARGIN
TREES: the Baobab tree (Adansonia digitata) for roundabouts and the spectacular Flamboyant (Delonix regia) for roadway median strips:
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
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
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
ROUNDABOUTSDETAIL 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
NOTEThe soil will be covered with compost and bark chips for
final appearance and water
conservation
1 x Adansonia digitata in centre of
roundabout
ROUNDABOUT CROSSINGS: Option 2OPTION 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
Carriageway Median Strips:Rusellia
equisetiformis to 1m height (centre) and Dianella to 50cm height (border)
Delonix regiaTo 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
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
Plantings along the carriageway median strips under & between Delonix regia trees:
Rusellia equisetiformis Dianella intermedia ‘Variegata’
Carriageway margins: tropical hedge planting
Cross-section
A-A
Cross-section
A-A
Tabernaemontana (1.8m height) and
Allamanda (1m height)combination
Hamelia (1.8m height) and Ixora (1 m
height) combination
Planting schemes A and B alternates on each side of
the road
Design A Design B
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
NOTEThe soil will be covered with
compost and bark chips for final
appearance and water conservation
Planted at 1m spacing
Planted at 2m spacing
Plants for carriageway margins/side strips (left and right sides of approach roads):Allamanda cathartica Ixora javanica Hamelia patens Tabernaemontana
divaricata
Forecourt Promenade:
ARRIVAL & DEPARTURE
PROMENADE
PLAN & SCHEMATIC VIEWS
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
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