SYNTHESIS AND NEW
DEFINITION OF THE AREAS
INCLUDED IN THE
URBAN-RURAL GRADIENT
André M., Mahy G., Lejeune P., Bogaert J. S3: Modelling of urban ecosystems – new approaches
1/3 Introduction
: variable définitions2
2/3 Aims of the study
3
2/3 Aims of the study
4
1. Identify the areas in the urban-rural gradient 2. Evaluate the relative importance of
characteristics and types of characteristics for every area and for the whole gradient
2/3 Aims of the study
5
1. Identify the areas in the urban-rural gradient 2. Evaluate the relative importance of
characteristics and types of characteristics for every area and for the whole gradient
2/3 Aims of the study
6
1. Identify the areas in the urban-rural gradient 2. Evaluate the relative importance of
characteristics and types of characteristics for every area and for the whole gradient
3. Evaluate the characteristics
4. Propose new definitions to the most cited areas
2/3 Aims of the study
7
1. Identify the areas in the urban-rural gradient
2. Evaluate the relative importance of characteristics
and types of characteristics for every area and for the whole gradient
3. Evaluate the characteristics
4. Propose new definitions to the most cited areas using
the retained characteristics
5. Translate definitions to landscape metrics (following
3/3 Method and results:
1.
Identify the areas in the urban-rural gradient8
urban suburba rural
3/3 Method and results:
1.
Identify the areas in the urban-rural gradient9 urban ? rural suburba n
3/3 Method and results:
1.
Identify the areas in the urban-rural gradient10 urban ? rural suburba n periurba n
3/3 Method and results:
1.
Identify the areas in the urban-rural gradient11 urban ? rural suburba n periurba n spra wl
3/3 Method and results:
1.
Identify the areas in the urban-rural gradient12 urban ? rural suburba n periurba n spra wl exurba n
3/3 Method and results:
1.
Identify the areas in the urban-rural gradient13 urban ? rural suburba n periurba n spra wl exurba n rurban
3/3 Method and results:
1.
Identify the areas in the urban-rural gradient14 urban ? rural suburba n periurba n spra wl exurba n rurban wildland s
3/3 Method and results:
2. Evaluate the relative importance of characteristics and types of characteristics for every area and for the whole gradient
15
Literature review
Citation index If (%) for each area and each characteristic
With i = characterictic for which the index is calculated z = area for which the index is calculated
fiz = citation frequency of the characteristic i in the area z
nc = total number of characteristics used to describe the area
Relative frequency index Ifr (%) for the whole urbanization
gradient
3/3 Method and results:
3. Evaluate the characteristics
17
According to:
The field of study of the author
The technic of study used
3/3 Method and results:
3. Evaluate the characteristics
18
According to:
The field of study of the author
The technic of study used
The context of the study area
In our study, the perfect characteristic is (at
least 3):
(1) Quantitative, (2) integrative, (3)
consensual,
3/3 Method and results:
4. Propose new definitions to the most cited areas using the retained characteristics
22
Lubumbashi, RDC
23
Lubumbashi, RDC
24
Lubumbashi, RDC
25
Lubumbashi, RDC
26
Lubumbashi, RDC
27
Lubumbashi, RDC
3/3 Method and results:
5. Translate definitions to landscape metrics (following studies based on satellite imagery)
28 Dominant class index
Dominant index
Proportion of built area index
Patch density (ρ)
Edge to nearest neighbor edge distance (z)
Agregation index (R) Proximity index (PX)
Dominant class index Dominant index
Proportion of built area index
