Impact of Land-Use/Land-Cover Changes on Land Surface Temperature in Adama Zuria Woreda, Ethiopia, Using Geospatial Tools

Belete, Tafesse (2017) Impact of Land-Use/Land-Cover Changes on Land Surface Temperature in Adama Zuria Woreda, Ethiopia, Using Geospatial Tools. Masters thesis, Addis Ababa University.

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Abstract

Land-use/land-cover change is one of the main environmental problems and challenges, which strongly influence the process of urbanization and agricultural development. The world has faced with the problem of overwhelming increase in land surface temperature (LST) as compared from year to year. The present study has investigated the impact of land-use/land-cover (LU/LC) change on LST. The research was conducted in Adama Zuria Woreda, located East Shewa Zone of Oromia region, in the main Ethiopian rift valley. Land-use/land-cover, LST and NDVI were extracted from Landsat TM (1989), Landsat ETM + (1999), Landsat 8 OLI/TIRS (2016) using GIS and remote sensing tools. Remote sensing and GIS were found to be a robust technique to quantify and map the LU/LC changes and its drawback on LST. Land surface temperature was done using split window algorism. Changes in LU/LC, which occurred between 1989 and 2016 in the study area was evaluated and analyzed using geospatial tools and verified by field data. The result of LU/LC indicated that farmland covered more than 60% during the study periods (1989–2016) and followed by shrub land covering more than 12%. The study indicated that most areas having lower LST in 1989 were changed to higher LST in 1999 and 2016.This happened due to the increased in different LU/LC changes especially the decreasing of vegetation cover in the study area. By linking the LU/LC classes and LST parameter using zonal statistics as table, it has been found that, LST has negative relationship with vegetation cover. Land surface temperature result showed that the northwestern, south (Wenji showa sugarcane plantation), lake Koka area and along Awash River have relatively low value ranged 9ºC–21ºC. This happened because of high NDVI value. While the eastern, Adama Town and western part had high LST value reached up to 42ºC. Therefore, the visual comparison of 1989, 1999 and 2016 images showed that the LU/LC type and NDVI status play a great role for variability of LST values. Land-use/land-cover change could not be stopped easily. However, different measures have to be taken by environmental experts and the concerned bodies to minimize the influence of changes on the LST and environments. At last, this study implies that the use of geospatial tools as time saving and cost effective methods for LST analysis and evaluation.

Item Type: Thesis (Masters)
Uncontrolled Keywords: LU/LC, LST, NDVI, Landsat image, GIS, Remote sensing
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Q Science > Q Science (General)
Q Science > QE Geology
Divisions: Africana
Depositing User: Selom Ghislain
Date Deposited: 11 Sep 2018 12:16
Last Modified: 11 Sep 2018 12:16
URI: http://thesisbank.jhia.ac.ke/id/eprint/5222

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