SWAT based hydrological assessment and characterization of Lake Ziway sub-watersheds, Ethiopia
Study region: Lake Ziway watershed, Ethiopia. Study focus: Lake Ziway and its watershed play a significant role in supporting the livelihoods of people in the region. However, the study region is currently under heavy human pressures mainly associated with the ever increasing of human population and...
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| Format: | Article |
| Language: | English |
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Elsevier
2017-10-01
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| Series: | Journal of Hydrology: Regional Studies |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214581817300988 |
| _version_ | 1818606476875268096 |
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| author | Hayal Desta Brook Lemma |
| author_facet | Hayal Desta Brook Lemma |
| author_sort | Hayal Desta |
| collection | DOAJ |
| description | Study region: Lake Ziway watershed, Ethiopia.
Study focus: Lake Ziway and its watershed play a significant role in supporting the livelihoods of people in the region. However, the study region is currently under heavy human pressures mainly associated with the ever increasing of human population and the subsequent intensification of agricultural development activities. The present study therefore aims at quantifying and comparing water balance components, feeder rivers’ discharge and evapotranspiration (ET) in the study region using SWAT (Soil and Water Assessment Tool) model. Flow data from 1988 to 2000 and from 2001 to 2013 were used for model calibration and validation periods respectively.
New hydrological insights for the region: Results show that infiltration, surface runoff, base flow and aquifer recharge were large in Katar sub-watershed while ET and lateral flow were large in Meki sub-watershed. However, surface and base flows showed decreasing trends in both sub-watersheds, yet Katar sub-watershed showed major contribution of water to Lake Ziway. The model estimated Lake Ziway and its watershed mean annual ETs as 1920 mm and 674 mm respectively, but plantation showed more ET than other land cover types in the watershed. If the current trends in irrigation development continue in the region, it is suspected that Katar and Meki Rivers are likely to cease to exist after seven decades, and so is then Lake Ziway to dry out. |
| first_indexed | 2024-12-16T14:11:28Z |
| format | Article |
| id | doaj.art-52739f41603d4dceb950ed27bffeb12f |
| institution | Directory Open Access Journal |
| issn | 2214-5818 |
| language | English |
| last_indexed | 2024-12-16T14:11:28Z |
| publishDate | 2017-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Hydrology: Regional Studies |
| spelling | doaj.art-52739f41603d4dceb950ed27bffeb12f2022-12-21T22:28:44ZengElsevierJournal of Hydrology: Regional Studies2214-58182017-10-0113C12213710.1016/j.ejrh.2017.08.002SWAT based hydrological assessment and characterization of Lake Ziway sub-watersheds, EthiopiaHayal Desta0Brook Lemma1Rachel Carson Center for Environment and Society, Ludwig-Maximilians-University (LMU), Leopoldstr. 11a, D-80802, Munich, GermanyChair of Ecosystem Planning and Management, EiABC, Addis Ababa University, P. O. Box 518, Addis Ababa, EthiopiaStudy region: Lake Ziway watershed, Ethiopia. Study focus: Lake Ziway and its watershed play a significant role in supporting the livelihoods of people in the region. However, the study region is currently under heavy human pressures mainly associated with the ever increasing of human population and the subsequent intensification of agricultural development activities. The present study therefore aims at quantifying and comparing water balance components, feeder rivers’ discharge and evapotranspiration (ET) in the study region using SWAT (Soil and Water Assessment Tool) model. Flow data from 1988 to 2000 and from 2001 to 2013 were used for model calibration and validation periods respectively. New hydrological insights for the region: Results show that infiltration, surface runoff, base flow and aquifer recharge were large in Katar sub-watershed while ET and lateral flow were large in Meki sub-watershed. However, surface and base flows showed decreasing trends in both sub-watersheds, yet Katar sub-watershed showed major contribution of water to Lake Ziway. The model estimated Lake Ziway and its watershed mean annual ETs as 1920 mm and 674 mm respectively, but plantation showed more ET than other land cover types in the watershed. If the current trends in irrigation development continue in the region, it is suspected that Katar and Meki Rivers are likely to cease to exist after seven decades, and so is then Lake Ziway to dry out.http://www.sciencedirect.com/science/article/pii/S2214581817300988WatershedEvapotranspirationWater balanceLake ZiwaySWAT modelEthiopia |
| spellingShingle | Hayal Desta Brook Lemma SWAT based hydrological assessment and characterization of Lake Ziway sub-watersheds, Ethiopia Journal of Hydrology: Regional Studies Watershed Evapotranspiration Water balance Lake Ziway SWAT model Ethiopia |
| title | SWAT based hydrological assessment and characterization of Lake Ziway sub-watersheds, Ethiopia |
| title_full | SWAT based hydrological assessment and characterization of Lake Ziway sub-watersheds, Ethiopia |
| title_fullStr | SWAT based hydrological assessment and characterization of Lake Ziway sub-watersheds, Ethiopia |
| title_full_unstemmed | SWAT based hydrological assessment and characterization of Lake Ziway sub-watersheds, Ethiopia |
| title_short | SWAT based hydrological assessment and characterization of Lake Ziway sub-watersheds, Ethiopia |
| title_sort | swat based hydrological assessment and characterization of lake ziway sub watersheds ethiopia |
| topic | Watershed Evapotranspiration Water balance Lake Ziway SWAT model Ethiopia |
| url | http://www.sciencedirect.com/science/article/pii/S2214581817300988 |
| work_keys_str_mv | AT hayaldesta swatbasedhydrologicalassessmentandcharacterizationoflakeziwaysubwatershedsethiopia AT brooklemma swatbasedhydrologicalassessmentandcharacterizationoflakeziwaysubwatershedsethiopia |