Investigation of the propagation of meteorological to hydrological drought and water required to recover from drought over Ethiopian basins
This study investigates drought propagation from meteorological to hydrological and streamflow required to recover from drought in four sub-basins: Genale, Tekeze, Awash, and Baro basins of Ethiopia. Due to limited observed streamflow data, the soil moisture accounting and routing (SMAR) model was u...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IWA Publishing
2023-09-01
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| Series: | Journal of Water and Climate Change |
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| Online Access: | http://jwcc.iwaponline.com/content/14/9/2988 |
| _version_ | 1797202719444828160 |
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| author | Tegegn Kassa Beyene Ankit Agarwal Manoj Kumar Jain Brijesh K. Yadav |
| author_facet | Tegegn Kassa Beyene Ankit Agarwal Manoj Kumar Jain Brijesh K. Yadav |
| author_sort | Tegegn Kassa Beyene |
| collection | DOAJ |
| description | This study investigates drought propagation from meteorological to hydrological and streamflow required to recover from drought in four sub-basins: Genale, Tekeze, Awash, and Baro basins of Ethiopia. Due to limited observed streamflow data, the soil moisture accounting and routing (SMAR) model was used to extend the streamflow data for each sub-basin from 1985 to 2017. Drought characteristics in terms of duration, severity, and onset/offset of drought and propagation time at different time scales are investigated using run theory and Pearson correlation, respectively. Two Archimedean copulas (Clayton and Gumbel) are used to identify the joint return period between drought duration and severity and the amount of streamflow required to recover from hydrological drought for each sub-basin. Our results revealed that drought frequency has increased over most sub-basins over the last two decades. The propagation time from meteorological drought to hydrological drought is shorter over the Tekeze sub-basin (1–3 months); however, Genale and Awash sub-basin show 3- to 6-month propagation time. The more extended propagation time is seen over the Baro sub-basin (6–9 months). The required amount of water for drought recovery estimation shows a linear relationship between the duration of the drought and the amount required.
HIGHLIGHTS
The drought onset and offset months for hydrological and meteorological drought depend on local weather conditions.;
The drought propagation analysis helps understand the impact of drought on the stream flows.;
The onset of hydrological drought lags for a certain period from meteorological drought.;
The amount of flow required for the stream to recover from prolonged drought exhibits a linear relationship with drought duration.; |
| first_indexed | 2024-03-11T18:48:00Z |
| format | Article |
| id | doaj.art-12aa3a8ccd5742e2a162e74e146a83ea |
| institution | Directory Open Access Journal |
| issn | 2040-2244 2408-9354 |
| language | English |
| last_indexed | 2024-04-24T08:07:54Z |
| publishDate | 2023-09-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Journal of Water and Climate Change |
| spelling | doaj.art-12aa3a8ccd5742e2a162e74e146a83ea2024-04-17T08:32:29ZengIWA PublishingJournal of Water and Climate Change2040-22442408-93542023-09-011492988300910.2166/wcc.2023.024024Investigation of the propagation of meteorological to hydrological drought and water required to recover from drought over Ethiopian basinsTegegn Kassa Beyene0Ankit Agarwal1Manoj Kumar Jain2Brijesh K. Yadav3 Department of Hydrology, Indian Institute of Technology Roorkee, Roorkee 247667, India Department of Hydrology, Indian Institute of Technology Roorkee, Roorkee 247667, India Department of Hydrology, Indian Institute of Technology Roorkee, Roorkee 247667, India Department of Hydrology, Indian Institute of Technology Roorkee, Roorkee 247667, India This study investigates drought propagation from meteorological to hydrological and streamflow required to recover from drought in four sub-basins: Genale, Tekeze, Awash, and Baro basins of Ethiopia. Due to limited observed streamflow data, the soil moisture accounting and routing (SMAR) model was used to extend the streamflow data for each sub-basin from 1985 to 2017. Drought characteristics in terms of duration, severity, and onset/offset of drought and propagation time at different time scales are investigated using run theory and Pearson correlation, respectively. Two Archimedean copulas (Clayton and Gumbel) are used to identify the joint return period between drought duration and severity and the amount of streamflow required to recover from hydrological drought for each sub-basin. Our results revealed that drought frequency has increased over most sub-basins over the last two decades. The propagation time from meteorological drought to hydrological drought is shorter over the Tekeze sub-basin (1–3 months); however, Genale and Awash sub-basin show 3- to 6-month propagation time. The more extended propagation time is seen over the Baro sub-basin (6–9 months). The required amount of water for drought recovery estimation shows a linear relationship between the duration of the drought and the amount required. HIGHLIGHTS The drought onset and offset months for hydrological and meteorological drought depend on local weather conditions.; The drought propagation analysis helps understand the impact of drought on the stream flows.; The onset of hydrological drought lags for a certain period from meteorological drought.; The amount of flow required for the stream to recover from prolonged drought exhibits a linear relationship with drought duration.;http://jwcc.iwaponline.com/content/14/9/2988copuladroughtethiopiahydrological droughtpropagation timerun theory |
| spellingShingle | Tegegn Kassa Beyene Ankit Agarwal Manoj Kumar Jain Brijesh K. Yadav Investigation of the propagation of meteorological to hydrological drought and water required to recover from drought over Ethiopian basins Journal of Water and Climate Change copula drought ethiopia hydrological drought propagation time run theory |
| title | Investigation of the propagation of meteorological to hydrological drought and water required to recover from drought over Ethiopian basins |
| title_full | Investigation of the propagation of meteorological to hydrological drought and water required to recover from drought over Ethiopian basins |
| title_fullStr | Investigation of the propagation of meteorological to hydrological drought and water required to recover from drought over Ethiopian basins |
| title_full_unstemmed | Investigation of the propagation of meteorological to hydrological drought and water required to recover from drought over Ethiopian basins |
| title_short | Investigation of the propagation of meteorological to hydrological drought and water required to recover from drought over Ethiopian basins |
| title_sort | investigation of the propagation of meteorological to hydrological drought and water required to recover from drought over ethiopian basins |
| topic | copula drought ethiopia hydrological drought propagation time run theory |
| url | http://jwcc.iwaponline.com/content/14/9/2988 |
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