Impacts of Built-Up Expansion on Land Use And Land Cover in Bauchi Metropolis, Bauchi State, Nigeria.

Abstract

This research analyzed the impacts of built-up expansion on LULC in Bauchi metropolis, Bauchi state, Nigeria. Specifically, the study examined the LULC change between 1990-2020, and the extent of Builtup expansion between 1990 to 2020. Landsat ETM+ satellite imageries of 1990 and 2010 and Landsat OLI satellite imagery of 2020, were used. The imageries were processed using Arc GIS 10.7. Transition Change Analysis was carried out using IDRISI Selva 17.0 Edition version. The result obtained from the transition analysis revealed that, water bodies contributed about 9.11 sq.km to built surfaces between 1990 and 2010 and additional 5.18 sq.km between 2010 and 2020. Vegetation contributed about 10.91 sq.km between 1990 and 2010 and 29.20 sq.km between 2010 and 2020. Bare surfaces contributed about 9.45 sq.km to built-up surfaces from 1990 to 2010 and another 0.90 sq.km from 2010 to 2020. Rock areas contributed about 9.19 sq.km to built-up between 1990 and 2010 and another 1.06 sq.km from 2010 to 2020. There is need for Bauchi State Government to equip the relevant planning authorities involved in decision making with adequate data to ensure broad based decisions. Keywords: Built-up expansion, LULC, Transition, Bauchi Metropolis.