Integration of Geo-Spatial Techniques for Desertification Impact Assessment on Agricultural lands In El-Qutaynah Area, Sudan
[1]
Abdelrahim Abdelmutalib Mohamed Salih, Department of GIS and Cartography, University of Khartoum, Faculty of Geography and Environmental Sciences, Khartoum, Sudan.
[2]
Eltaib Saeed Mohamed Ganawa, Department of GIS and Cartography, University of Khartoum, Faculty of Geography and Environmental Sciences, Khartoum, Sudan.
[3]
Ahmed Hmad Ibrahim Elfaig, Department of GIS and Cartography, University of Khartoum, Faculty of Geography and Environmental Sciences, Khartoum, Sudan.
[4]
Hassan Saad Mohammed Hilmi, Faculty of Agriculture, Alzaiem Alazhari University, Khartoum, Sudan.
This study focused on El-Qutaynah area, White Nile State, Sudan. The overall objective of this study was to monitoring, assessment and evaluate of the land degradation and desertification in the area. While the specified aims of this research was to mapping the change that occurred in the agricultural lands during the last century. To achieve these objectives, the research was based on various dataset extracted from satellite images (TM and ETM+) for the period 1987 to 2013, fieldwork and climatic data. Pre-processing methods which includes; geometric and radiometric correction was carried out for the raw images. Change detection method as one of the data transformation was used for the satellite images to detect the change based on the pixel values as indicators for change in land use land cover types in the study area. Image processing methods which includes; supervised and unsupervised classification procedures were performed to the corrected images that to determine the LULC classes for the reference and recent image. The study pointed out that the agricultural land was decreased and increased over time and space. However, a decreased in sand areas was noticed and indicated in the study area by (-18.56%) in 2013, with increases in the agricultural area as general. The study also revealed that the sand movement that comes from others areas outside the state has extremely affected the study area in the past. Finally, the study concluded that the space technologies by means of remote sensing and geographic information system (GIS) are very useful when used as tools for evaluating desertification process in arid and semi-arid areas over the world.
Geo-Spatial, Desertification, Sudan, Change Detection, Agriculture
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