GIS And Remote Sensing Based Assessment of the Population Pressure on Land Use/Land Cover Change of Legedadi Catchments Area and Its Impact on the Legedadi Water Reservior, Central Ethiopia
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Date
2016-06
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Addis Ababa University
Abstract
In the last thirty years in LCA which is one of the source of surface water for the city of Addis Ababa, existed population pressure which is responsible for LULCC. The main objective of this study is examine the population pressure on LULC change of LCA and its consequence on LWR. In this thesis, data on population over time were taken from CSA and Bereh Wereda during 1984-2014 census result, RS image of 1984, 1999 and 2014 to detect the LULCC using maximum likelihood supervision, AAWSA data to investigate the relationship of LWR and LULCC, questioner, FGD and KII were used to attain the proposed research objectives. The population growth in LCA shows that it is more than double within three decades. The population pressure over the last thirty years in LCA where examined by using PPI and the finding indicates that the population pressure increased from 1984-2014.The GIS and RS analysis results confirms that the LULCC observed, Settlement showed an increase of 134 % and followed by Cultivation by 118.2%. While natural vegetation, eucalyptus, grassland and water body decreased by -25.7%, -28.1,-32% and -10.8% respectively. The correlation result of population growth and LULCC of the study area shows that there was a strong positive relationship between population growth and LULCC. The correlation result of LWR and LULCC also indicates an impact of LULCC on volume of water and the amount of siltation through time. From the analysis of the socio economic situation of households to identify the proximate and underlying causes of the LULCC, the results suggested that LULCC were closely associated with human activities.
Keywords: Population growth, PPI, GIS, Remote Sensing, LULC, TM, ETM+, Correlation
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Population Growth, Remote Sensing, Correlation, LULC