Climate variability and trends in the Endorheic Lake Hayk basin: implications for Lake Hayk water level changes in the lake basin, Ethiopia
Abstract For sustainable climate hazard management, climate information at the local level is crucial for developing countries like Ethiopia, which has an exceptionally low adaptive capacity to changes in climate. As a result, rather than making local decisions based on findings from national-scale...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2022-05-01
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| Series: | Environmental Systems Research |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s40068-022-00256-6 |
| _version_ | 1818203700490928128 |
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| author | Mezgebu Mewded Adane Abebe Seifu Tilahun Zeleke Agide |
| author_facet | Mezgebu Mewded Adane Abebe Seifu Tilahun Zeleke Agide |
| author_sort | Mezgebu Mewded |
| collection | DOAJ |
| description | Abstract For sustainable climate hazard management, climate information at the local level is crucial for developing countries like Ethiopia, which has an exceptionally low adaptive capacity to changes in climate. As a result, rather than making local decisions based on findings from national-scale studies, the study area’s research gap of local level climate variability and trend was investigated within the endorheic Lake Hayk basin for the historic series from 1986 to 2015 to scientifically show climate change/variability implications on Lake Hayk water level variations. To achieve the study objective, the precipitation, temperature (station and ERA5 reanalysis product) and Lake water level (patchy lake level fused with remotely sensed water areas) were examined using various statistical approaches with the integration of remote sensing and geographical information system. The major findings revealed less variable (CV = 16.66%) and statistically nonsignificant declining trends (− 33.94 mm/decade) in annual precipitation. Belg and bega seasonal precipitations showed highly variable (CV = 43.94–47.46%) nonsignificant downward trends of 4.57 mm and 22 mm per decade respectively, whereas kiremt precipitation showed moderate variability (CV = 23.80%) and increased nonsignificantly at a rate of 21.89 mm per decade. Annual and seasonal mean temperatures exhibited less variable but statistically significant rising trends ranging from 0.20 to 0.45 °C each decade. The lake’s water level showed less variable nonsignificant rising trends (70 mm to 120 mm per year) on annual and seasonal scales between 1999 and 2005. The lake's surface area has decreased from 2243.33 ha in 2005 to 2165.33 ha in 2011. During 2011–2015, it demonstrated a high variable (CV > 30%) statistically significant dropping trend ranging from − 250 mm to − 340 mm per year on annual and seasonal periods. The study discovered that the endorheic lake Hayk basin was dominated by variable and diminishing precipitation, as well as continuous warming trends, particularly in recent years. It is argued that this climatic state was having a negative impact on Lake Hayk’s substantially dropping water level, necessitating an immediate basin-based water management decision to save Lake Hayk from extinction. |
| first_indexed | 2024-12-12T03:29:31Z |
| format | Article |
| id | doaj.art-029d96db222a44d1a82f571ae25e9646 |
| institution | Directory Open Access Journal |
| issn | 2193-2697 |
| language | English |
| last_indexed | 2024-12-12T03:29:31Z |
| publishDate | 2022-05-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Environmental Systems Research |
| spelling | doaj.art-029d96db222a44d1a82f571ae25e96462022-12-22T00:39:57ZengSpringerOpenEnvironmental Systems Research2193-26972022-05-0111111710.1186/s40068-022-00256-6Climate variability and trends in the Endorheic Lake Hayk basin: implications for Lake Hayk water level changes in the lake basin, EthiopiaMezgebu Mewded0Adane Abebe1Seifu Tilahun2Zeleke Agide3Ethiopian Institute of Water Resources, Addis Ababa UniversityWater Technology Institute, Arba Minch UniversityFaculty of Civil and Water Resources Engineering, Bahir Dar UniversityEthiopian Institute of Water Resources, Addis Ababa UniversityAbstract For sustainable climate hazard management, climate information at the local level is crucial for developing countries like Ethiopia, which has an exceptionally low adaptive capacity to changes in climate. As a result, rather than making local decisions based on findings from national-scale studies, the study area’s research gap of local level climate variability and trend was investigated within the endorheic Lake Hayk basin for the historic series from 1986 to 2015 to scientifically show climate change/variability implications on Lake Hayk water level variations. To achieve the study objective, the precipitation, temperature (station and ERA5 reanalysis product) and Lake water level (patchy lake level fused with remotely sensed water areas) were examined using various statistical approaches with the integration of remote sensing and geographical information system. The major findings revealed less variable (CV = 16.66%) and statistically nonsignificant declining trends (− 33.94 mm/decade) in annual precipitation. Belg and bega seasonal precipitations showed highly variable (CV = 43.94–47.46%) nonsignificant downward trends of 4.57 mm and 22 mm per decade respectively, whereas kiremt precipitation showed moderate variability (CV = 23.80%) and increased nonsignificantly at a rate of 21.89 mm per decade. Annual and seasonal mean temperatures exhibited less variable but statistically significant rising trends ranging from 0.20 to 0.45 °C each decade. The lake’s water level showed less variable nonsignificant rising trends (70 mm to 120 mm per year) on annual and seasonal scales between 1999 and 2005. The lake's surface area has decreased from 2243.33 ha in 2005 to 2165.33 ha in 2011. During 2011–2015, it demonstrated a high variable (CV > 30%) statistically significant dropping trend ranging from − 250 mm to − 340 mm per year on annual and seasonal periods. The study discovered that the endorheic lake Hayk basin was dominated by variable and diminishing precipitation, as well as continuous warming trends, particularly in recent years. It is argued that this climatic state was having a negative impact on Lake Hayk’s substantially dropping water level, necessitating an immediate basin-based water management decision to save Lake Hayk from extinction.https://doi.org/10.1186/s40068-022-00256-6Climate variability/trendsImplicationsWater level changesEndorheic Lake Hayk basin |
| spellingShingle | Mezgebu Mewded Adane Abebe Seifu Tilahun Zeleke Agide Climate variability and trends in the Endorheic Lake Hayk basin: implications for Lake Hayk water level changes in the lake basin, Ethiopia Environmental Systems Research Climate variability/trends Implications Water level changes Endorheic Lake Hayk basin |
| title | Climate variability and trends in the Endorheic Lake Hayk basin: implications for Lake Hayk water level changes in the lake basin, Ethiopia |
| title_full | Climate variability and trends in the Endorheic Lake Hayk basin: implications for Lake Hayk water level changes in the lake basin, Ethiopia |
| title_fullStr | Climate variability and trends in the Endorheic Lake Hayk basin: implications for Lake Hayk water level changes in the lake basin, Ethiopia |
| title_full_unstemmed | Climate variability and trends in the Endorheic Lake Hayk basin: implications for Lake Hayk water level changes in the lake basin, Ethiopia |
| title_short | Climate variability and trends in the Endorheic Lake Hayk basin: implications for Lake Hayk water level changes in the lake basin, Ethiopia |
| title_sort | climate variability and trends in the endorheic lake hayk basin implications for lake hayk water level changes in the lake basin ethiopia |
| topic | Climate variability/trends Implications Water level changes Endorheic Lake Hayk basin |
| url | https://doi.org/10.1186/s40068-022-00256-6 |
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