Ethiopia’s Water Resources: An Assessment Based on Geospatial Data-Driven Distributed Hydrological Modeling Approach

Woldegebriel, Tamrat; Garg, Vaibhav; Gupta, P. K.; Srivastav, S. K.; Ranjan, Rajeev

doi:10.1007/s12524-022-01511-0

Cited by 6 publications

(4 citation statements)

References 54 publications

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“…Not only does this knowledge evaluate the drivers of drought but also helps in planning and executing water resource development schemes (Ayalew 2018, Woldegebriel et al 2022. Given precipitation deficit has been found as the major driver of the 2021 extreme drought event across the West, we should investigate the forcing mechanisms of the unusual, failed NAM in 2020.…”

Section: Discussionmentioning

confidence: 99%

“…The VIC model simulates complex land processes that occur at topographical and hydrological landscapes such as the WUS (Woldegebriel et al 2022). Notwithstanding, we also used historical simulations from the Coupled Model Intercomparison Project Phase 6 (CMIP6) accessed via https://esgfnode.llnl.gov/search/cmip6/ from January 1980 to December 2014 in attributing the extreme event.…”

Section: Methodsmentioning

confidence: 99%

“…The major causes of drought are very complex, especially because they depend on processes that feed moisture to the atmosphere. Recent studies have employed the variable infiltration capacity (VIC) model for hydrological assessments by understanding land-atmosphere interactions (Livneh and Hoerling 2016, Luo et al 2017, Kumari et al 2021, Woldegebriel et al 2022. The relationship between temperature, precipitation, soil moisture, runoff, groundwater, and discharge is an old concept in hydrology, but the application of this knowledge to drought is relatively recent (Eltahir andYeh 1999, Van Loon 2015).…”

Section: Introductionmentioning

confidence: 99%

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Characterizing the development and drivers of 2021 Western US drought

Affram

Zhang

Hipps

et al. 2023

Environ. Res. Lett.

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Understanding the drivers of the major 2021 drought conditions across the Western U.S. (WUS) is important to develop future resilience and adaptation measures. While evapotranspiration (ET) tends to increase in a warming climate when water is available, areas with low precipitation would evaporate less water than expected, as seen in the 2021 drought. This study examines the relative roles of higher temperatures and lower precipitation, as well as anthropogenic forcing (e.g. increased greenhouse gases and land-use land-cover change) to the 2021 drought across the WUS. Using observations, the anomalously dry 2021 soil moisture is mainly tied to precipitation deficit, rather than higher temperatures, suggesting that an increase in ET in response to higher temperatures (i.e. saturation deficit) depends on water availability. Therefore, high temperatures may play only a secondary role in driving the 2021 drought condition across the WUS. Additionally, a suite of variable infiltration capacity model experiments confirms that the reduced precipitation in 2021 has caused negative soil moisture anomalies. Based on the Coupled Model Intercomparison Project Phase 6 experiments, anthropogenic forcing dramatically increases the risk of the extreme 2021 dryness, with risk ratio being 73.91, 12.78 and 25.81 for temperature, precipitation, and soil moisture respectively. Therefore, the extreme drought is not explained by natural forcing (e.g. solar irradiance and volcanic eruption) alone. Rather, anthropogenic forcing (e.g. increased greenhouse gases and land-use land-cover change) has increased the risk of this drought condition by approximately 26 times in terms of soil moisture compared with a world without this forcing.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Characterizing the development and drivers of 2021 Western US drought

Affram

Zhang

Hipps

et al. 2023

Environ. Res. Lett.

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“…Similarly, Mengistu et al [53] used regional flood frequency analysis because streamflow data at gauging locations are unavailable in the Genale-Dawa River Basin. Woldegebriel et al [54] observed a lack of spatiotemporal streamflow data in the Baro-Akobo River basin for water resource assessment using hydrological modeling. All these examples raise concerns about the lack of reliable streamflow data in Ethiopia, which may impede hydrology and water resource research and practice.…”

Section: Implication Of Streamflow Data Gapsmentioning

confidence: 99%

Priority Research Topics to Improve Streamflow Data Availability in Data-Scarce Countries: The Case for Ethiopia

Taye,

Zimale,

Woldesenbet

et al. 2023

Hydrology

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Lack of consistent streamflow data has been an increasing challenge reported by many studies in developing countries. This study aims to understand the current challenges in streamflow monitoring in Ethiopia to prioritize research topics that can support sustained streamflow monitoring in the country and elsewhere. A workshop-based expert consultation, followed by a systematic literature review, was conducted to build a collective understanding of the challenges and opportunities of streamflow monitoring in Ethiopia. The experts’ consultation identified the top ten research priorities to improve streamflow monitoring through research, education, remote sensing applications, and institutions. The experts’ views were supported by a systematic review of more than 300 published articles. The review indicated scientific investigation in Ethiopian basins was constrained by streamflow data gaps to provide recent and relevant hydrological insights. However, there is inadequate research that seeks solutions, while some researchers use experimental methods to generate recent streamflow data, which is an expensive approach. Articles that attempted to fill data gaps make up less than 20% of the reviewed articles. This study identified research priorities that can benefit streamflow data providers and the research community in alleviating many of the challenges associated with streamflow monitoring in countries such as Ethiopia.

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