Acer Negundo_urban design
In the city, planting trees can be used for many purposes: demarcate boundaries and areas, provide privacy or create visual barriers, protect from wind, sun or noise, beautify or shade in recreational or leisure spaces such as parks and squares etc. For all these purposes they can be used in isolation, in small groups, large masses or forming alignments in streets. In either case, it is essential to the perfect a knowledge of the nature and limitations of the many species that can be used, as well as, the environment where (soil, climate, pollution, etc.) they will be located, because in this way we will have a greater assurance of achieving the desired ends.
It is desirable to select a species whose natural size, with minimal human intervention, does not conflict with the surrounding buildings. This is sometimes impossible to solve, because it wants to plant shade trees, and in fact planted in sidewalks less than 2 m. wide, which involves the need for drastic pruning annually and continuous intervention to complaints, not without reason, neighbours, whose houses are up to the treetops, and traders, who see the vision of their windows and advertisers signs, for which they must pay taxes, is totally or partially annulled by the branches of these trees.
Therefore, it would be advisable not to plant trees on sidewalks with a lower width 3-4 m., But if you still want to plant, small sized species, such as the genera Citrus, Ligustrum, Koelreuteria be used, Lagerstroemia and Prunus, to name some of the best known.
In a progressive manner, and depending on the width of sidewalk available, we will be selecting species of higher freight or globosas aparasoladas cups and leaving them grow with his natural demeanor or as natural as possible to have enough space. In these cases we can use species such as Morus genres, Catalpa, Paulownia, Jacaranda, Acer, Melia, Robinia, Sophora, Tipuana, Ulmus, Tilia, Quercus, Populus, etc.
We decided to study the Acer negundo for its resistance to pollution, rapid growth and lack of toxicity in both mining reforestation, traffic areas and city parks.
The species prefers sunny and no limestone terrain. It can grow in damp places and supports cold until -30 ° C.
The shoots are green, often with a whitish to pink or violet waxy coating when young. Branches are smooth, somewhat brittle, and tend to retain a fresh green colour rather than forming a bark of dead, protective tissue. The bark on its trunks is pale gray or light brown, deeply cleft into broad ridges, and scaly.
MODELING MODEL
On the menu: family New/ Mass
We put the unit of measure in meters Manage/ Project units/ length and we determine the number of levels in our tree Model/ Level.
For carrying out the tree we use the plan view Model/ Draw on work plane, for the 3D view Project Browser/3D Views/ Vasari 3D selected parts of the tree, not including the trunk Modify / form/ create form/ solid form.
The Acer Negundo is day deciduous, so depending on the time of year it will look and will have a different thickness.
PROPERTIES/ ASSOCIATE FAMILY PARAMETER/ ADD PARAMETER, this step is to simulate the effect of the loss of leaves in the tree, so that the shadows of the tree does not appear in this season.
To vary the height select the two levels will vary more over the years. To determine the different heights Family Types/ New We change the height of the tree in the window dimensions adding new levels by clicking on new.
Finally, we opened our project situation trastevere area and insert the tree Load into project.
