Spatio Temporal Lake Level Change of Lake Abijata, Ethiopia: A Remote Sensing Approach_ Crimson Publishers

Spatio Temporal Lake Level Change of Lake Abijata, Ethiopia: A Remote Sensing Approach by Binyam Tesfaw Hailu* in Environmental Analysis & Ecology Studies_ Journal of Environmental Sciences

 

Abstract
Lake environment Satellite images have an important role for lakes management and the spatio-temporal variation of lakes in size and shape. However, there is still a gap on the scientific assessment methods on Ethiopian lakes level change studies. Therefore, this research aimed on the spatial and temporal variability of decadal lake level changes of Lake Abijata using Landsat satellites images and possible change factors. The images were acquired for years 1972, 1984, 1995, 2003 and 2015. Then, these images were pre-processed and enhanced for the extraction of Lake Abijata's boundary. The result showed that in 1972, Lake Abijata has spatial extent or area of 198.4km2and declined to 179.2km2 and 150.6km2 in 1984 and 1994, respectively. Then, the decline of lake level continued for the year 2003, which becomes 144.9km2 and 131.8km2 in 2015.

That is, Lake Abijata shrunk to 66.6km2 from year 1972 to 2015. Moreover, the decline of the lake is mainly on the north western direction with a distance of 3.64km and in the south eastern direction the lake level shifted to center by 1.267km through the last four decades. Thus, this research revealed that Lake Abijata is a drastically shrinking or decreasing lake in Main Ethiopian Rift. This research has a great significance for decision makers in order to elucidate the spatial variation of lake level change of Lake Abijata for the last four decades and could be vital for mitigation and decision making, especially for environmental impact assessment and for better management of the lake’s environment.

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