Stream flow dynamics under current and future land cover conditions in Atsela Watershed, Northern Ethiopia

Gebretekle, Haftu; Nigusse, Amare Gebremedhin; Demissie, Biadgilgn

doi:10.1007/s11600-021-00691-6

Cited by 8 publications

(3 citation statements)

References 60 publications

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“…A study of factors influencing a community's vulnerability to drought shows that the areas most vulnerable to agricultural drought were rainfed farmland and sandy pastures, located in areas with a very high probability of moisture deficiency. This indicates that drought vulnerability is also linked closely to types of land-uses conditions, which might contribute to available water scarcity [126][127][128]. Although the current study took the simplification without considering future LULC changes, it is noted that climate change is likely to have significant impacts on LULC conditions, which is also highly related to socioeconomic developments.…”

Section: Impact Of Climate Change On Drought Characteristicsmentioning

confidence: 84%

Impact of Climate Change on Hydrometeorology and Droughts in the Bilate Watershed, Ethiopia

Orke

2022

Water

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This study aims to assess the potential impacts of climate change on hydrometeorological variables and drought characteristics in the Ethiopian Bilate watershed. Climate projections under two Representative Concentration Pathways (RCP4.5 and RCP8.5) were obtained from the Coordinated Regional Downscaling Experiment (CORDEX) Africa for the near future (2021–2050) and far future (2071–2100) periods. The Soil and Water Assessment Tool (SWAT) model was applied to assess changes in watershed hydrology with the CORDEX-Africa data. The Standardized Precipitation Index (SPI), Streamflow Drought Index (SDI), and Reconnaissance Drought Index (RDI) were calculated to identify the characteristics of meteorological, hydrological, and agricultural droughts, respectively. Due to a significant rise in temperature, evapotranspiration will increase by up to 16.8% by the end of the 21st century. Under the RCP8.5 scenario, the annual average rainfall is estimated to decrease by 38.3% in the far future period, inducing a reduction of streamflow of up to 37.5%. Projections in reduced diurnal temperature range might benefit crop growth but suggest elevated heat stress. Probabilities of drought occurrence are expected to be doubled in the far future period, with increased intensities for all three types of droughts. These projected impacts will exacerbate water scarcity and threaten food securities in the study area. The study findings provide forward-looking quantitative information for water management authorities and decision-makers to develop adaptive measures to cope with the changing climate.

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Section: Impact Of Climate Change On Drought Characteristicsmentioning

confidence: 84%

Impact of Climate Change on Hydrometeorology and Droughts in the Bilate Watershed, Ethiopia

Orke

2022

Water

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“…Past investigations have shown a large variety of hydrological models used for evaluating and predicting changes in water balance (Aredo et al, 2023) and soil erosion both worldwide (Zeiger and Hubbart, 2016;Gharibdousti et al, 2019) and in Ethiopian watersheds (Miheretu and Yimer, 2018), but most of them used the Soil and Water Assessment Tool (SWAT) (see, among many others, Gessese and Yonas, 2008;Senti et al, 2014;Yesuf et al, 2015;Ebabu et al, 2019;Megersa et al, 2019;Gebretekle et al, 2022;Mariye et al, 2022;Anteneh et al, 2023).…”

Section: Discussionmentioning

confidence: 99%

Advances in characterizing and monitoring land cover/use and associated ecosystem changes using remote sensing data

2024

Frontiers Research Topics

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Frontiers is more than just an open access publisher of scholarly articles: it is a pioneering approach to the world of academia, radically improving the way scholarly research is managed. The grand vision of Frontiers is a world where all people have an equal opportunity to seek, share and generate knowledge. Frontiers provides immediate and permanent online open access to all its publications, but this alone is not enough to realize our grand goals. Frontiers journal seriesThe Frontiers journal series is a multi-tier and interdisciplinary set of openaccess, online journals, promising a paradigm shift from the current review, selection and dissemination processes in academic publishing. All Frontiers journals are driven by researchers for researchers; therefore, they constitute a service to the scholarly community. At the same time, the Frontiers journal series operates on a revolutionary invention, the tiered publishing system, initially addressing specific communities of scholars, and gradually climbing up to broader public understanding, thus serving the interests of the lay society, too. Dedication to qualityEach Frontiers article is a landmark of the highest quality, thanks to genuinely collaborative interactions between authors and review editors, who include some of the world's best academicians. Research must be certified by peers before entering a stream of knowledge that may eventually reach the public -and shape society; therefore, Frontiers only applies the most rigorous and unbiased reviews. Frontiers revolutionizes research publishing by freely delivering the most outstanding research, evaluated with no bias from both the academic and social point of view. By applying the most advanced information technologies, Frontiers is catapulting scholarly publishing into a new generation. What are Frontiers Research Topics?Frontiers Research Topics are very popular trademarks of the Frontiers journals series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area.

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Section: Introductionmentioning

confidence: 99%

SWAT model-based quantification of the impact of land use land cover change on sediment yield in the Fincha watershed, Ethiopia

Regasa,

Nones

2023

Front. Environ. Sci.

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In recent years, Ethiopia is facing problems due to soil erosion, mainly because of the conversion of natural vegetation into cultivated land to answer to increasing human pressure. Such changes in coverage are fostering soil erosion, which is also affecting dam reservoirs, because of the increasing sediment yield entering the lake. The present study focuses on the Ethiopian Fincha watershed and takes advantage of the potentiality of the Soil and Water Assessment Tool (SWAT) model, to investigate how land use land cover changes impact soil erosion and the consequent sediment yield entering the Fincha Dam. The SWAT model was calibrated and validated using time series data of stream flow and sediment covering the period 1986-2008, and its performance was evaluated by looking at the coefficient of determination, Nash-Sutcliffe simulation efficiency, and per cent bias. Once validated, the SWAT model was applied to derive sediment yield for the future 30 years, based on forecasted land use land cover conditions. The results show that the mean annual soil loss rate increased from 32.51 t ha−1 in 1989 to 34.05 t ha−1 in 2004, reaching 41.20 t ha−1 in 2019. For the future, a higher erosion risk should be expected, with the annual soil loss rate forecasted to be 46.20 t ha−1 in 2030, 51.19 t ha−1 in 2040, and 53.98 t ha−1 in 2050. This soil erosion means that sediments transported to the Fincha Dam, located at the watershed outlet, increased significantly in the last 30 years (from 1.44 in 1989 to 2.75 mil t in 2019) and will have the same trend in the future (3.08–4.42 mil t in 2020 and 2050, respectively), therefore highly affecting the Fincha reservoir services in terms of reduction of water volume for irrigation and hydroelectric power generation. By providing possible medium/long-term scenarios, the present work can help land planners and decision-makers in developing future land management strategies based on actual projections, eventually aiming to reduce soil erosion at the watershed scale and guarantee the sustainable development of the Fincha region and its key hydraulic infrastructures.

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Stream flow dynamics under current and future land cover conditions in Atsela Watershed, Northern Ethiopia

Cited by 8 publications

References 60 publications

Impact of Climate Change on Hydrometeorology and Droughts in the Bilate Watershed, Ethiopia

Impact of Climate Change on Hydrometeorology and Droughts in the Bilate Watershed, Ethiopia

Advances in characterizing and monitoring land cover/use and associated ecosystem changes using remote sensing data

SWAT model-based quantification of the impact of land use land cover change on sediment yield in the Fincha watershed, Ethiopia

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