Assessment of Ethiopian Lakes Level Change and Identification of Endangered Lakes for the Last four Decades Using Landsat Satellite Image
| dc.contributor.advisor | Tesfaw, Binyam (PhD) | |
| dc.contributor.author | Girma, Shimelis | |
| dc.date.accessioned | 2018-07-10T13:17:04Z | |
| dc.date.accessioned | 2023-11-09T14:09:01Z | |
| dc.date.available | 2018-07-10T13:17:04Z | |
| dc.date.available | 2023-11-09T14:09:01Z | |
| dc.date.issued | 2016-05 | |
| dc.description.abstract | Lake level change is fluctuation of water level within the lakes that resulted from the shifting of water balance from its static state. At national scale, the Ethiopian lakes level change was not studied yet using remote sensing method and there was no well-organized geodatabase that shows their spatial variation with specified time interval. Therefore, this was the biggest challenge in order to identify whether the lakes are in dynamic or in steady state. This study aims to solve the above mentioned problem through assessing the Ethiopian lakes level change by developing well-organized geodatabase and identifying the endangered lakes for the last four decades using Landsat satellite images (Landsat MSS, TM, ETM+ and OLI sensors). The result shows that there are 108 natural and man-lakes and from these lakes endangered lakes were identified with ranking their spatial extent fluctuation. Accordingly, Lake Abiyata, Chamo, Chelelek and Haromaya, ranked top three declining lakes, and Lake Beseka, top one rising lake, was identified as endangered lakes. Furthermore, Lake Abiyata and Chamo were shrunk by 33.59% (66.64 km2) and 8.98% (29.43 km2) respectively and Lake Beseke was drastically raised by above 900% compared to their 1970’s spatial extent. However, Lake Chelelek and Haromya were desiccated before 2010’s due to anthropogenic factors. The main factors considered in this study was the Land use land cover of the lakes surrounding and over consumption of the lakes water. Moreover, the verification for identified endangered lakes were done using the field collected coordinates of the lakes edge and the trend of water level of the lakes measured by Ministry of Water, Irrigation and Energy. Due to the drastic decline, Lake Abiyata needs special rehabilitation practice and Lake Beseka also needs proper treatment. Furthermore, the final result of this study used as a benchmark for the coming researches. Key words: Landsat image, lakes level change, endangered lakes, Ethiopia, geodatabase | en_US |
| dc.identifier.uri | http://10.90.10.223:4000/handle/123456789/7722 | |
| dc.language.iso | en | en_US |
| dc.publisher | Addis Ababa Universty | en_US |
| dc.subject | Landsat image | en_US |
| dc.subject | Lakes level change | en_US |
| dc.subject | Endangered lakes | en_US |
| dc.subject | Ethiopia | en_US |
| dc.subject | Geodatabase | en_US |
| dc.title | Assessment of Ethiopian Lakes Level Change and Identification of Endangered Lakes for the Last four Decades Using Landsat Satellite Image | en_US |
| dc.type | Thesis | en_US |