ASSESSMENT OF LANDUSE/LANDCOVER CHANGES IN KADUNA METROPOLITAN AREA USING REMOTE SENSING AND GEOGRAPHIC INFORMATION SYSTEM TECHNIQUES
ASSESSMENT OF LANDUSE/LANDCOVER CHANGES IN KADUNA METROPOLITAN AREA USING REMOTE SENSING AND GEOGRAPHIC INFORMATION SYSTEM TECHNIQUES
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Date
2006-10
Authors
CHRIS, NDABULA
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Abstract
This study is aimed at assessing LULC in Kaduna metropolitan
area. It is fundamental to this research effort to understand the dynamic
relationship between Kaduna urban growth and landuse/landcover change
as an index of land degradation.The methodology adopted involved
landuse/landcover mapping using field mapping with GPS and GIS
technique. The field mapping involved systematic and stratified random
sampling techniques. While GIS techniques involve table digitizing of
analogue maps and on- screen digitizing, maximum likelihood classification
and interpretation of Landsat.TM (1987), Spot.XS (1994) and Landsat.ETM
(2001). A hydrographically corrected Digital Elevation Model (DEM) was
generated from digitized subset of topomap of 1967 of the study area to
aid floodplain analysis, while Normalized Difference Vegetative Index
(NDVI) was computed for vegetation analysis.
The Analysis of Variance (ANOVA) using two-factors (x and y) at
0.05 significant level was used to test the hypotheses for the spatial (x)
and temporal (y) variations that occur among different landuse/landcover
and also among the classes of vegetation cover observed from image
interpretation and NDVI analysis respectively. Result showed that there is
significant differences between the means extents of the various
landuse/landcover classes as well as the vegetation cover categories in
both x and y directions. This signifies that there is both spatial and
temporal variations in landuse/landcover and severe deforestation in the
1980’s, 1990’s and 2000’s. This proofs that there is rapid
landuse/landcover changes and deforestation in the study area (Kaduna
Metropolis and environs).
Results showed that Kaduna experienced rapid growth at an
average rate of 1.77Km2 or 9.84% annually. NDVI analysis and statistical
test showed that there is severe deforestation with Non vegetated surfaces
increasing at an annual rate of 2.6%, Discontinuous savannah shrubs
declining at 1.61%, Dominant savannah shrub declining at 1.38% and
forest increasing at 2.42% annually due to agro forest and orchards.
Kaduna metropolitan area is also experiencing rapid
landuse/landcover changes with cultivated area experiencing a total of
36.74%, floodplain agricultural area 0.42%, forest area 28.54%, water
bodies, 25.74% growth between 1987 and 2001.
Description
A DISSERTATION SUBMITTED TO THE
POSTGRADUATE SCHOOL,
AHMADU BELLO UNIVERSITY, ZARIA
NIGERIA
IN PARTIAL FULFILLMENT FOR THE AWARD
OF MASTER OF SCIENCE IN
GEOGRAPHY
DEPARTMENT OF GEOGRAPHY
AHMADU BELLO UNIVERSITY, ZARIA
NIGERIA
OCTOBER, 2006
Keywords
ASSESSMENT,, LANDUSE,, LANDCOVER,, CHANGES,, KADUNA,, METROPOLITAN,, AREA,, USING,, REMOTE,, SENSING,, GEOGRAPHIC,, INFORMATION,, SYSTEM,, TECHNIQUES,