Hydrological impact assessment of climate change on Lake Tana’s water balance, Ethiopia
The aim of this study is to evaluate the hydrological impacts of climate change on the water balance of Lake Tana in Ethiopia. Impact assessments are by downscaled General Circulation Model (GCM) output and hydrological modeling. For A2 and B2 emission scenarios, precipitation, maximum and minimum t...
| Autores principales: | , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Scientific Research Publishing, Inc.
2016
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/81163 |
| _version_ | 1855534209622343680 |
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| author | Nigatu, Z.M. Rientjes, T.H.M. Haile, Alemseged Tamiru |
| author_browse | Haile, Alemseged Tamiru Nigatu, Z.M. Rientjes, T.H.M. |
| author_facet | Nigatu, Z.M. Rientjes, T.H.M. Haile, Alemseged Tamiru |
| author_sort | Nigatu, Z.M. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | The aim of this study is to evaluate the hydrological impacts of climate change on the water balance of Lake Tana in Ethiopia. Impact assessments are by downscaled General Circulation Model (GCM) output and hydrological modeling. For A2 and B2 emission scenarios, precipitation, maximum and minimum temperature estimates from the HadCM3 GCM were used. GCM output was downscaled using the Statistical DownScaling Model (SDSM 4.2). Impact analyses were applied for three future time periods: early, mid and late 21st century. Over-lake evaporation is estimated by Hardgrave’s method, and over-lake precipitation is estimated by inverse distance weighing interpolation, whereas inflows from gauged and ungauged catchments are simulated by the HBV hydrological model. Findings indicate increases in maximum and minimum temperature on annual base for both emission scenarios. The projection of mean annual over lake precipitation for both A2 and B2 emission scenarios shows increasing pattern for 21st century in comparison to the baseline period. The increase of mean annual precipitation for A2 emission scenario is 9% (112 mm/year), 10% (125 mm/year) and 11% (137 mm/year) for the three future periods respectively. B2 emission scenario mean annual precipitation shows increase by 9% (111 mm/year), 10% (122 mm/year) and 10% (130 mm/year) respectively for the three future periods. Findings indicate consistent increases of lake storage for all three future periods for both A2 and B2 emission scenarios. |
| format | Journal Article |
| id | CGSpace81163 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | Scientific Research Publishing, Inc. |
| publisherStr | Scientific Research Publishing, Inc. |
| record_format | dspace |
| spelling | CGSpace811632025-03-11T09:50:20Z Hydrological impact assessment of climate change on Lake Tana’s water balance, Ethiopia Nigatu, Z.M. Rientjes, T.H.M. Haile, Alemseged Tamiru hydrology impact assessment climate change lakes water balance statistical methods models emission precipitation temperature evaporation catchment areas surface water flow rate The aim of this study is to evaluate the hydrological impacts of climate change on the water balance of Lake Tana in Ethiopia. Impact assessments are by downscaled General Circulation Model (GCM) output and hydrological modeling. For A2 and B2 emission scenarios, precipitation, maximum and minimum temperature estimates from the HadCM3 GCM were used. GCM output was downscaled using the Statistical DownScaling Model (SDSM 4.2). Impact analyses were applied for three future time periods: early, mid and late 21st century. Over-lake evaporation is estimated by Hardgrave’s method, and over-lake precipitation is estimated by inverse distance weighing interpolation, whereas inflows from gauged and ungauged catchments are simulated by the HBV hydrological model. Findings indicate increases in maximum and minimum temperature on annual base for both emission scenarios. The projection of mean annual over lake precipitation for both A2 and B2 emission scenarios shows increasing pattern for 21st century in comparison to the baseline period. The increase of mean annual precipitation for A2 emission scenario is 9% (112 mm/year), 10% (125 mm/year) and 11% (137 mm/year) for the three future periods respectively. B2 emission scenario mean annual precipitation shows increase by 9% (111 mm/year), 10% (122 mm/year) and 10% (130 mm/year) respectively for the three future periods. Findings indicate consistent increases of lake storage for all three future periods for both A2 and B2 emission scenarios. 2016 2017-05-23T04:23:13Z 2017-05-23T04:23:13Z Journal Article https://hdl.handle.net/10568/81163 en Open Access Scientific Research Publishing, Inc. Nigatu, Z. M.; Rientjes, T.; Haile, Alemseged Tamiru. 2016. Hydrological impact assessment of climate change on Lake Tana’s water balance, Ethiopia. American Journal of Climate Change, 5:27-37. doi: 10.4236/ajcc.2016.51005 |
| spellingShingle | hydrology impact assessment climate change lakes water balance statistical methods models emission precipitation temperature evaporation catchment areas surface water flow rate Nigatu, Z.M. Rientjes, T.H.M. Haile, Alemseged Tamiru Hydrological impact assessment of climate change on Lake Tana’s water balance, Ethiopia |
| title | Hydrological impact assessment of climate change on Lake Tana’s water balance, Ethiopia |
| title_full | Hydrological impact assessment of climate change on Lake Tana’s water balance, Ethiopia |
| title_fullStr | Hydrological impact assessment of climate change on Lake Tana’s water balance, Ethiopia |
| title_full_unstemmed | Hydrological impact assessment of climate change on Lake Tana’s water balance, Ethiopia |
| title_short | Hydrological impact assessment of climate change on Lake Tana’s water balance, Ethiopia |
| title_sort | hydrological impact assessment of climate change on lake tana s water balance ethiopia |
| topic | hydrology impact assessment climate change lakes water balance statistical methods models emission precipitation temperature evaporation catchment areas surface water flow rate |
| url | https://hdl.handle.net/10568/81163 |
| work_keys_str_mv | AT nigatuzm hydrologicalimpactassessmentofclimatechangeonlaketanaswaterbalanceethiopia AT rientjesthm hydrologicalimpactassessmentofclimatechangeonlaketanaswaterbalanceethiopia AT hailealemsegedtamiru hydrologicalimpactassessmentofclimatechangeonlaketanaswaterbalanceethiopia |