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Multi-criteria analysis for the identification of waste disposal areas

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Multi-criteria analysis for the identification of waste disposal areas Presentation by Eri Kudo and Olivier Mills – PowerPoint PPT presentation

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Title: Multi-criteria analysis for the identification of waste disposal areas


1
Multi-criteria analysis for the identification of
waste disposal areas
Presentation by Eri Kudo and Olivier Mills
2
Identification of waste disposal areas
  • For centuries unconcerned about waste
  • Industrial revolution ? Exponential increase in
    volume
  • Today, one of the most crucial problems faced by
    urban centres is WHERE to dispose of it

3
Case study Brazil - Disposing of marble and
granite
  • Marble and Granite Industry ? large volumes of
    waste (up to 25 of rock in form of sludge)
  • Discarded by tanks in ponds or rivers
  • Silting (surface water), increase hardness,
    increased Aluminium (groundwater)

4
Waste disposal area identification Multi-criteria
analysis Method
  • Define criteria (factors and and restrictions)

5
Waste disposal area identification - Method
1) Define criteria, factors and restrictions
Criteria Factors (degree of aptness) Restrictions (apt, inapt)
Environmental Hydrography, flaws, pedology, geology, geomorphology Hydrography, geological, 200m buffer
Operational Roads system Declinivity (allowed interval from 1 to 30)
Socio-economic Urban zone, districts, farms Urban zone, districts, farms, 500m buffer
6
Waste disposal area identification
Hillshading, hydrography and urban perimeter
Urban perimeter
Hillshading
Hydrography
7
Waste disposal area identification
Urban perimeter, Farms, district and road system
Urban perimeter
Farm
District
Road system
8
Waste disposal area identification Multi-criteria
analysis Method
  • Define criteria (restrictions and factors)
  • 2) Standardize (normalize to same scale)

9
Waste disposal area identification
Geologic Map
10
Waste disposal area identification
Pedologic Map
11
Waste disposal area identification Multi-criteria
analysis Method
  • Define criteria (restrictions and factors)
  • 2) Standardize (normalize to same scale)
  • 3) Weight factors and criteria

12
Waste disposal area identification - Method
3) Factor Weighting
Geology
Road system
13
Waste disposal area identification - Method
3) Criteria weighting
14
Waste disposal area identification Multi-criteria
analysis Method
  • Define criteria (restrictions and factors)
  • 2) Standardize (normalize to same scale)
  • 3) Weight factors and criteria
  • 4) Aggregate (put together)

15
Waste disposal area identification Aggregation
and output
16
Waste disposal area identification Aggregation
and output
17
Waste disposal area identification Conclusion
GIS Multi-criteria analysis
ADVANTAGES
  • Low cost (GIS)
  • Model multiple scenarios (high risk, low risk)
  • Graphical representation of options
  • Dynamic (GIS data)

DISADVANTAGES
  • Careful choice of criteria and weighting
    functions
  • Coherence with reality
  • Doesnt consider whole life of disposal site
    (time factor)
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