Factors Determining The City Green
Deciding the pattern / type of the City green / Landscape involves many technical and design factors.(18)
Table 8.2: Design factors for city green
| S.NO. |
FACTORS |
DATA TYPE |
| 1 |
Aesthetic / Functional Criteria |
Scale and maturity.· Structure of crown. Density of the foliage Growth rate Seasonal attributes. Relation to the surroundings. Texture Special properties.
|
| 2 |
Cultural criteria |
City tolerance Hardness Local habit characteristics Resistance to pest
|
| 3 |
Operational criteria |
Client requirements Transplanting limitation. Maintenance requirements Cost of plantation /transplantation. Availability of species. Spatial availability
|
| 4 |
Geophysical criteria(In local level it is altered by man drastically) |
Topography. Soil condition Ground water / water sources. Micro Climate Seasonal data of monsoon, summer, winter. Amount of sunlight available, duration.
|
| 5 |
Socio-economic criteria |
Life pattern of the people. Growth pattern of the city. Economic base of the city. Population and density. Land use pattern.
Owner ship of the land.
|
Technical factors
As the natural element, development of the green spaces in the urban areas depends on the natural (scientific) and manmade factors at the regional level. (Table 8.1)
Design factors
Design factors highly defined by the functional requirement of the location, (for example, with in the small house plot itself functional demand vary from the front to back side of the building) and the user pattern and the building type where it associates (16).(fig.6,7,8,9,10). The design factors can be divided into
Environmental factors
Apart form the above factors; the local urban environment condition is the prime factors (13) in determine the City’s green
The perfect compromise should be achieved between the above factors in order to develop an appropriate city green system to make our cities sustainable.
Roll of GIS / RS in developing the city green
Selection of appropriate City’s green system involves number of selection criteria and different disciplines, which is tedious job for a planner / designer to do manually, and it is a time consuming process. Handling all these criteria and data types from the different discipline demands sophisticated tool. The entry of RS / GIS / GPS enabled the planners /designers to acquire and analysis different data in variety of fashions.
Table 8.3 Emvironmental factors determining the city green
| S.NO. |
FACTORS |
DATA TYPE |
| 1 |
Air: |
Composition, humidity, pollution, suspended solids, temperature, |
| 2 |
Water |
pH, flooding, run off, pollution, ground water table level and recharge, surface water body |
| 3 |
Land: |
Soil composition, soil erosion, pollution, contamination, amount of permeable space, open land, |
| 4 |
Urban climate |
Heat island, diurnal temperature variations, and wind pattern, precipitation. |
Remote Sensing
The development of an appropriate city green system demands many basic spatial information from different disciplines in the regional scale, such as soil map, climatic maps, topographic maps, vegetative maps, land use maps, land cover maps, etc. (Table 8.1, Table 8.2, Table 8.3). Collection of all this information in the conventional method required huge manpower and it is time-consuming process. The remote sensing facilitates us to collect all this biological and physical information across the disciplines in the regional level through aerial photographs / satellite pictures directly and frequently (30).
Geographical Information System
The selection of particular tree for particular location involves multiple multilevel queries of the spatial and attribute data. To this in manually is the exasperating and tough to find alternatives. GIS assist us in handling all this data simultaneously as we desire and it is easy to find alternatives. GIS handles number of spatial objects, their properties, and their interrelationships to each other. And enabling us to store, process and visualizes current and old information. The stored digital map information of the GIS database can be plot in the required formatted, to produce a map. Retrieval, manipulation and display of all these data are possible through set of GIS tools. (29) such as
- Automated mapping technology. : Help us in handling different spatial map information system easily.
- Data base management: help us in handling variety of attribute data.
- Land records information: Helps in handling the cartographic and attribute data accurately and completely, location specific
- Topological data structures: Helps in handling the spatial relationships among point, lines, and polygon features.
- Spatial analysis capabilities. Helps in
retrieve, manipulate and display map and location related
attribute data
Therefore GIS is the vital tool to identify the appropriate city green, through it’s varies spatial quarry tools. That is