Impact of Land Use Land Cover Change on Land Surface
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Date
2012-09
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Addis Ababa University
Abstract
For the past decades, an increase 111 population pressure, policy, institutional and
economic development influences caused changes in LULC of city and periphery. This
was mainly due to urban expansion and densification. The effects of land use and land
cover changes have impacted the urban climate by altering the surface energy and water
balance. Although there are few studies on land use and land cover changes in Addis
Ababa, studies related to the impact of such change on urban climate are missing. As a
result, this study tries to examine the influence of LULCC on urban climate in Addis
Ababa city from 1986 to 2010 by analyzing Landsat TM satellite data, meteorological
records, and census data by integrating remote sensing and GIS technologies. The results
show that grass land, agricultural land, forest land and bare land declined by 43.32km2
,
16.03km2
, 9.74km2
, and 9.65 km2
, respecti vely, on the other hand, built-up areas was
dramatically expanded from 100.13k.m2 in 1986 to 180.13km2 in 2010 that is almost two
times from initial year. Changes in LULC were accompanied by changes in LST. The
average LST in 1986 was 28.88°C and it increased to 30.88°C in 2010 with average value
2°C. The change in LST was mainly associated with changes in impervious surface and
in vegetation abundance. In addition, the annual average air temperatures increase in the
entire Addis Ababa city by 1.5 °C over the study period. Therefore, clear and effective
policy with necessary institutional set up is important to guide the growth of city.
Key words: Remote sensing, GIS, LST, LULC, Addis Ababa
Description
Keywords
Remote sensing, GIS, LST, LULC