Journal of Basic and Applied Research International
 

Journal of Basic and Applied Research International, ISSN No. : 2395-3438 (Print), 2395-3446 (Online), Vol.: 22, Issue.: 2

Original Research Article

ASSESSING THE LAND USE AND LAND COVER CHANGES DUE TO URBAN GROWTH IN ACCRA, GHANA

 

FRANCIS YEBOAH1, ALFRED AWOTWI2, ERIC K. FORKUO3* AND MICHAEL KUMI4

1CSIR, Building and Road Research Institute, UP.O.Box 40, KNUST, Kumasi Ghana.

2Department of Environmental Engineering, Med Mining Company Limited, P.O.Box AT 971, Accra, Ghana.

3Department of Geomatic Engineering, Kwame Nkrumah University of Science and Technology (KNUST), Kumasi, Ghana.

4Environmental Chemistry Division, CSIR-Water Research Institute, P.O.Box TL 695, Tamale Ghana.

Abstracts

Information on urban growth, land use and land cover change study is very important to local government and urban planners for the betterment of future planning for sustainable development of cities and urban centres. Land use and land cover (LULC) change has become one of the main focus for assessing environmental changes and its impact on natural resources. Conversion of most of Land use/Land cover (woodland, grassland, savannah and forest) into cropland and pasture has been on ascendency during the last decade. Urbanization has brought serious losses of agricultural land, vegetation land and water bodies. This study assessed the Changes in land use/land cover in Accra, the capital city of Ghana over 25-year period using Landsat Thematic Mapper and Enhanced Thematic Mapper from 1985 and 2010 respectively. Accuracy assessment of the post classification comparison was done using 1985 and 2010 aerial photographs of the study area as the ground truth data. From-to change analysis was used to quantify the change in the land use/land cover. The results show that the forests, agricultural lands and water bodies decreased by 38%, 48% and 3% respectively in the 25 years period. The rate of infrastructure development (urban) was very high and Built-Up went up by 59% within the same period. The presence of clouds and shadows in the 1985 image limit the total quantification of the various land cover.

Keywords :

Land use; land cover; change detection; landsat image, Accra.