Temporal and spatial changes of rainfall and streamflow in the Upper Tekezē–Atbara river basin, Ethiopia

Gebremicael, Tesfay Gebretsadkan; Mohamed, Yasir A.; Zaag, Pieter van der; Hagos, Eyasu Yazew

doi:10.5194/hess-21-2127-2017

Cited by 71 publications

(53 citation statements)

References 56 publications

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“…Streamflow data at the outlets of the two catchments were collected from the Ethiopian Ministry of Water Resources for calibration and validation of the model. Descriptions and quality of these data are presented in Gebremicael et al (). However, since around 2010/2011, irrigated agriculture in the two catchments has significantly increased and hence the low flow in the rivers has been reduced due to abstraction for irrigation consumption (Gebremicael et al, ).…”

Section: Datasets and Methodsmentioning

confidence: 99%

Section: Study Area Descriptionsmentioning

confidence: 99%

“…The two catchments are characterized by a semi‐arid climate in which the majority of the rainfall occurs from June to September after a long dry season (Gebremicael et al, ). More than 80% of the total rainfall falls in July and August only (Gebremicael et al, ). Rainfall over the two catchments is highly variable mainly associated with the seasonal migration of the intertropical convergence zone (ITCZ) and the complex topography (Gebremicael et al, ).…”

Section: Study Area Descriptionsmentioning

confidence: 99%

“…More than 80% of the total rainfall falls in July and August only (Gebremicael et al, ). Rainfall over the two catchments is highly variable mainly associated with the seasonal migration of the intertropical convergence zone (ITCZ) and the complex topography (Gebremicael et al, ). However, they have almost the same mean annual rainfall and temperature.…”

Section: Study Area Descriptionsmentioning

confidence: 99%

See 3 more Smart Citations

Change in low flows due to catchment management dynamics—Application of a comparative modelling approach

Gebremicael

Mohamed

Zaag

et al. 2020

Hydrological Processes

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Understanding the natural low flow of a catchment is critical for effective water management policy in semi-arid and arid lands. The Geba catchment in Ethiopia, forming the headwaters of Tekeze-Atbara basin was known for its severe land degradation before the recent large scale Soil and Water conservation (SWC) programs. Such interventions can modify the hydrological processes by changing the partitioning of the incoming rainfall on the land surface. However, the literature lacks studies to

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Section: Datasets and Methodsmentioning

confidence: 99%

Section: Study Area Descriptionsmentioning

confidence: 99%

Section: Study Area Descriptionsmentioning

confidence: 99%

Section: Study Area Descriptionsmentioning

confidence: 99%

See 2 more Smart Citations

Change in low flows due to catchment management dynamics—Application of a comparative modelling approach

Gebremicael

Mohamed

Zaag

et al. 2020

Hydrological Processes

Self Cite

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“…Sandy clay loam and sandy loam are the dominant soil textural types in Korir and Hatset irrigation schemes, respectively. In the areas where both irrigation schemes are located, the rainfall is uni-modal characterized by high variability [19,36]. Such variabilities are mainly associated with the seasonal migration of the inter-tropical convergence zone (ITCZ) and its complex topography [37][38][39][40].…”

Section: Study Areamentioning

confidence: 99%

Effects of irrigation scheduling and different irrigation methods on onion and water productivity in Tigray, northern Ethiopia

Haile

Gebremicael

Kifle

et al. 2019

Preprint

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Efficient irrigation water use can meet its objective if irrigated agriculture is managed properly in regions where water is limited. A two-year (2016)(2017) field experiments were conducted in the semiarid areas of Tigray in northern Ethiopia to evaluate irrigation scheduling with different irrigation methods. The experiments were carried out to identify their contribution for enhancing onion and water productivity in water-stressed irrigation schemes of Korir and Hatset sites. Six factorial treatments comprising of three levels of irrigation methods (furrow, basin and flood) and two levels of irrigation scheduling (fixed interval and farmer's practices) were evaluated with three replications. The agronomic and irrigation parameters were subjected to separate level-wise comparison followed by the factorial interaction effects. The results showed that the fixed irrigation interval, basin irrigation method and their 2 factorial combinations showed better performances and produced a higher yield and water productivity.On average, 263.85 q/ha and 281 q/ha of onion were obtained under the basin irrigation method and basin irrigation with fixed irrigation interval (T2) at both sites and seasons. For the T2, 6.27 and 6.06 kg/m 3 of water productivity (WP) and 4.39 and 4.24 kg/m 3 of irrigation water productivity (IWP) were obtained at Korir and Hatset sites, respectively showing higher results as compared to other treatment combinations.Moreover, the basin irrigation method produces higher marketable onion bulbs that are essential for onion producers to earn maximum profit from selling and enhance their livelihoods. Treatments comprising basin method and fixed interval showed better onion and water productivity in the water-limited irrigation schemes of Tigray. Hence, focusing on enhanced irrigation scheduling techniques and irrigation methods are important for effective agricultural water management. Farmers, irrigation experts, water resources managers and decision-makers are suggested to use these techniques to save the limited water resources and increase agricultural productivity.

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Quantifying the impact of landscape changes on hydrological variables in the alpine and cold region using hydrological model and remote sensing data

Jin

Zhao

Qin

et al. 2021

Hydrological Processes

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Quantifying the impact of landscape on hydrological variables is essential for the sustainable development of water resources. Understanding how landscape changes influence hydrological variables will greatly enhance the understanding of hydrological processes. Important vegetation parameters are considered in this study by using remote sensing data and VIC-CAS model to analyse the impact of landscape changes on hydrology in upper reaches of the Shule River Basin (URSLB). The results show there are differences in the runoff generation of landscape both in space and time.With increasing altitude, the runoff yields increased, with approximately 79.9% of the total runoff generated in the high mountains (4200-5900 m), and mainly consumed in the mid-low mountain region. Glacier landscape produced the largest runoff yields (24.9% of the total runoff), followed by low-coverage grassland (LG; 22.5%), alpine cold desert (AL; 19.6%), mid-coverage grassland (MG; 15.6%), bare land (12.5%), high-coverage grassland (HG; 4.5%) and shrubbery (0.4%). The relative capacity of runoff generation by landscapes, from high to low, was the glaciers, AL, LG, HG, MG, shrubbery and bare land. Furthermore, changes in landscapes cause hydrological variables changes, including evapotranspiration, runoff and baseflow. The study revealed that HG, MG, and bare land have a positive impact on evapotranspiration and a negative impact on runoff and baseflow, whereas AL and LG have a positive impact on runoff and baseflow and a negative impact on evapotranspiration. In contrast, glaciers have a positive impact on runoff. After the simulation in four vegetation scenarios, we concluded that the runoff regulation ability of grassland is greater than that of bare land. The grassland landscape is essential since it reduced the flood peak and conserved the soil and water.

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Temporal and spatial changes of rainfall and streamflow in the Upper Tekezē–Atbara river basin, Ethiopia

Cited by 71 publications

References 56 publications

Change in low flows due to catchment management dynamics—Application of a comparative modelling approach

Change in low flows due to catchment management dynamics—Application of a comparative modelling approach

Effects of irrigation scheduling and different irrigation methods on onion and water productivity in Tigray, northern Ethiopia

Quantifying the impact of landscape changes on hydrological variables in the alpine and cold region using hydrological model and remote sensing data

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