INTEGRATING AND UTILIZING AHP AND GIS FOR LANDFILL SITING

PRESENTER : IZNI IZZATI BINTI MOHAMAD2nd DECEMBER 2014

OUTLINE

Introduction on landfillParameters in landfill site selectionMethodology : AHPUtilizing of GISConclusion

INTRODUCTION ON LANDFILL

• Most used in waste disposal other than incinerator and composting

• Cheaper and convenient• Often misunderstood with open and burning dumps• Life cycle of landfill:

Planning

Construction

Operatio

n

Completed

Final storage

• Total solid waste produced on 2005 is 19,100 tons per day and increased to 21,100 tons per day on 2010

• Escalation will cause a problem to the solid waste management because more places are needed to dump and dispose the waste

• NIMBY (Not in My Backyard) and NIABY (Not in Anyone’s Backyard) campaign has become a challenge to the decision makers and planner to open new landfill site.

INTRODUCTION ON LANDFILL

• The insufficient amount of landfill will cause many problems:– improper waste management, leachate leaking,

and bad scenic view to the community• Many criteria and parameters need to be

consider:– social, physical, economic, political, technical

parameters and environmental aspects

INTRODUCTION ON LANDFILL

• Evaluation used in assessment and evaluation method for suitable landfill are [5]:– Ad-hoc hethod: compare alternatives without using any

method to order preferences– Checklist method: compare alternatives with no

compensatory rules– Economic method: use economic procedure to translate into

monetary unit– Cartographic method: compare alternatives using maps– Pair wise comparison method: use sequential comparison

alternatives in pairs as basis for ordering preferences– Matrix method : use matrix for summary, compare and

evaluate of criteria and alternatives

INTRODUCTION ON LANDFILL

LANDFILL SITE SELECTION APPROACH

• Landfill site selection can be divided into four main phases: – The first stage is identification of potential sites

through preliminary screening based on constraints (exclusionary criteria)

– In second phase, candidate sites are evaluated based on attributes, ranked, and appropriate sites are selected and identified.

– The third phase is the evaluation of their suitability based on environmental impact assessment, economic feasibility, engineering design, and cost comparison

– In the final phase, the best site is selected.

Bukit Tagar, Selangor

Selection of Landfill Using GIS• Give significant help to solve this matter because of

its potential in handling large volume of spatial data that needs to be evaluates and processed

• GIS for locating landfill site is economical and practical as they have :– i) capabilities to manage and analyze the volumes of diverse

multidisciplinary data needed in application; – ii) functionality to perform ‘what if’ scenarios which can be used

either to evaluate the effects of different planning policies and to select those most suitable, and

– iii) ability to be used for ‘modelling impacts’ of proposed, operational and abundant sites and suggesting modifications to minimize impact

PARAMETERS FOR LANDFILL SITING(National Strategic Plan for Solid Waste Management)

No. Standard Criteria for new landfill siting

Malaysia Specification

1 Residential (m) 10002 Water bodies (m) 1003 Groundwater line (m) 10004 Distance from transfer station (km) 255 Protected forest (m) 30006 Airport location (km) 37 Road line (m) 5008 Slope (%) 109 Soil permeability (cm/sec) <10-6

10 Fault line (m) 100

Research Methodology

Methodology

• In stage 1, this research is planned and the information needed is gathered

• In stage 2, the data needed had been collected from Department of Survey and Mapping Malaysia (JUPEM), Iskandar Regional Development Authority (IRDA), Department of Rural and Urban Planning, Municipal Cities, Department of Mineral and Geoscience Malaysia and Centre for Geographical Information & Analysis (CGIA).

Topography map

Hydro geological map

Geological map Seismotectonic map

MBJBT map

Methodology• In stage 3, the Euclidean distance analysis conducted to

measures the straight line as it can expressed as physical distance in GIS project. Reclassification analysis are done to assign numeric values to classes with each map layer to ensure they have equal importance in determine the most suitable location for landfill.

• In stage 4, sensitivity analysis is a process of ascertaining use of evaluating how sensitive the spatial multicriteria model output depends upon small changes in input values

• Lastly, the user interface will be developed so that it can be used by end user.

CONCLUSION

• Having proper data handling, the research can be more accurate and efficient

• Helps the developer and planner to determined the next suitable landfill site

THANK YOU