assessing the impact of urbanisation on water bodies using gis

8/12/2019 Assessing the Impact of Urbanisation on Water Bodies Using Gis

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PROJECT PRESENTATIONon

ASSESSING THE IMPACT OF URBANISATION ON WATER

BODIES USING GIS A CASE STUDY OF KUMASI

METROPOLISby

BEMA ADWOA (MISS

Supervised by MRS CYNTHIA BOYE


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MODE OF PRESENTATIONPROBLEM DEFINITION

OBJECTIVES

JUSTIFICATION

METHODOLOGY

FACILITIES USED

RESULTS

CONCLUSION

RECOMMENDATION


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PROBLEM DEFINITION

CAUSES OF URBANISATION

lack of resources in rural areas.

standard of living in urban areas will be muchbetter in rural areas

Natural increase caused by a decrease in deathrates while birth rates remain high.

Urbanisation is considered as the process in whichthe number of people living in cities increasescompared with the number of people living in ruralareas( Vimala, 2006


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PROBLEM DEFINITION CONTIMPACT OF URBANISATION

Socio-economic impactsEnvironmental impactsSocio-cultural impacts

BENEFITS OF URBANISATION

Growth of commercial activities

Social & cultural integration

Efficient services

Resources of utilization


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EFFECTS OF URBANISATIONOvercrowdingPoor sanitation facilitiesUnemploymentCrimePollutionWater degradation and scarcityNatural resource depletion


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URBANISATION IN KUMASI

Kumasi is noted as the second largest city in thecountry with a population 1,170,270 as at 2000 andcurrent population being 1,520,117

This city being the central part of the Ashanti Regionhas gained a tremendous shift of the populace from therural areas.

This is as a result of the presence of some amenitiessuch as industries, trading centers and other businessventure


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URBANISATION IN KUMASI In Ghana here a town is considered urban when the

population is equal to or greater than 5000

Increase in the proportion of urban population inKumasi relative to the total population of AshantiRegion posses a potential risk to the water resources.

This is because a number of the population

encroaches on the banks of water bodies in the

Kumasi Metropolis.


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URBANISATION IN KUMASI The discharge of liquid waste from sewers and

drains into the rivers also threatens the water

quality of these water bodies.

This project therefore seeks to build a map to

show the relative impact of urbanization on water

bodies in the central part of the Ashanti Region.


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Figure 1 shows a encroachers along a water body


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JUSTIFICATION

Geographic Information System (GIS) is a

computerized system that facilitates the phases ofdata entry, data analysis and data presentation

especially in cases dealing with geographically

referenced data.

GIS was used because of it capabilities of making

use of both the spatial and demographic data used in

generating the map

This has however proven to be a useful tool foridentifying problematic location and quantifying the

exact impact urbanisation on our water bodies in

relation to this project.


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METHODOLOGY

DATA MANAGEMENT

GENERATION OFMAP

CREATION OF BUFFER

AND ITS ANALYSIS

LITERATURE REVIEW

DATA COLLECTION


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FACILITIES AND RESOURCE USEDLibrary facilities at UMaT

Internet facilities at UMaT

Data about place of study from KMA, GWCL, Town

and Country Planning

Consultation with supervisor and other lecturers inthe Department of Geomatic Engineering


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RESULTSIn the creation of the buffer a distance

allocated by the town and country planning

which is 100ft was used. This was converted

into meters. As such 30.48m buffer was createwas for both maps


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2000


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2000


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RESULT AND DISCUSSION CONT

2000 2010 % increase

Perimeter 2,785 4,680 68

Area 104478 160304 53

Towns 5000

57 65 14

Cities 5000 62 72 16

Table 1 Values of Measured Data on the Selected Buffer


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CONCLUSIONFrom the analysis made GIS has proven its capable of

assessing the exact impact of urbanisation on the

water bodies .

Also it has been proven that rate encroachment on

the banks of the water bodies in Kumasi increases as

a result of the increase in the population.


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RECOMMENDATION

Infrastructure needs to be improved in the rural areas.

Opportunities should be created within rural areas to

prevent migration to cities.

Much attention should be given to the urbanisation

process by the formulation of strong policy by the town

and country planning of KMA in protecting our water

bodies


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THANK YOU

assessing the impact of urbanisation on water bodies using gis

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