University of Khartoum

Causes and Impacts of Land Cover Changes at Sharq Alneel Locality-Khartoum State (1973-2014) - Using Remote Sensing Technique

Causes and Impacts of Land Cover Changes at Sharq Alneel Locality-Khartoum State (1973-2014) - Using Remote Sensing Technique

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Title: Causes and Impacts of Land Cover Changes at Sharq Alneel Locality-Khartoum State (1973-2014) - Using Remote Sensing Technique
Author: Hassan, Sumaya Mohamed AwadElseed
Abstract: The extension of bare lands at the expense of productive land areas has been a repeated phenomenon in different places on earth’s surface and there are many evidences which indicate human misuse of land in addition to climatic factors that accelerated this phenomenon, as it is the case in the study area. The main objective of the study is to detect the land cover changes at SharqAlneel Locality, Khartoum State in 41 years (1973-2014), andto show the drivers of land cover changes and their environmental and socio-economic consequences. The study used remote sensing technique, which considered as one of the most important recent means that facilitates efficient decision making for resources management, as baseline tool to detect land cover changes and this technique has been supported by qualitative interviews. Four satellite imageries were used in this study which are: Multi-Spectral Scanner (land sat1, MSS 1973), Thematic Mapper (land sat5, TM 1986 & 1995), and Operation Land Image (land sat8, OLI 2014) which were digitally processed using ERDAS IMAGINE 10.2 software to classify land cover types of the study area. To detect the land cover changes the images were classified into four classes: natural vegetations, bare lands, agricultural lands and residential areasusing supervised classification method and then an image differencing technique was applied to identify the changes in the years (1973-1986), (1986-1995), (1995-2014) and (1973-2014). The analysis of the satellite imageries showed the gradual transformation of natural vegetation cover to bare land. The findings showed that natural vegetation cover decreased from 8376 km2 in 1973 to 2710 km2 in 2014, while bare lands increased from 489 km2 in 1973 to 4454 km2 in 2014. All the types of land cover of the study area were increased at the expense of natural vegetation cover. These changes in natural vegetation cover indicates to the acceleration of land degradation as a normal result of climatic changes and human misuse of land in addition to absence of ongoing monitoring and assessments of natural pastures and desert creeping by the specialized authorities which ultimately led to different environmental and socio-economic impacts in the study area. The envisaged changes in the study area are very profound and demand rigorous scientific verification. Therefore, it is recommended that a multi – professional team to be assigned to carry out further comprehensive research to limit the progress of these changes.
Description: 139 Pages
URI: http://khartoumspace.uofk.edu/123456789/24516


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