Impacts of climate change on stream flow and water availability in Anger sub-basin, Nile Basin of Ethiopia

Boru, Geremew Fekadu; Gonfa, Zelalem Biru; Diga, Girma Mamo

doi:10.1007/s40899-019-00327-0

Cited by 33 publications

(12 citation statements)

References 12 publications

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“…In several previous studies, the impacts of changing climate on hydrologic processes are investigated by using downscaled regional climate model data in the SWAT model (Boru et al 2019;Worner et al 2019;Yan et al 2019). Regional climate models at their finer resolution allow the simulation of local climate conditions in detail and provide future predictions.…”

Section: Introductionmentioning

confidence: 99%

Hydrologic responses to climate and land-use/land-cover changes in the Bilate catchment, Southern Ethiopia

Kuma

Fufa

Demissie

2021

Journal of Water and Climate Change

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The likely effects of climate and land-use/land-cover (LULC) changes on hydrologic processes in Bilate catchment, Ethiopia were evaluated. The study emphasizes the evaluation of individual and combined impacts on hydrologic responses of climate and LULC changes. Climatic scenarios included a downscaled regional climate model from CORDEX-Africa. The CA–Markov model was used to project LULC. The results revealed that distinct changes on hydrologic responses occurred which follow the direction of climate and LULC changes. A 30.87% decline in rainfall resulted in about 4.09, 1.43 and 3.57% decline in runoff, groundwater and water yield, respectively. A rise in mean temperature by 1.3 °C resulted in 7 and 0.8% increase in potential and actual evapotranspiration, respectively. Runoff, groundwater and water yield are projected to decrease by 11.24, 12.54 and 11.54%; however, potential and actual evapotranspiration are projected to increase by 19 and 14.7%, respectively, under combined climate and LULC changes. The joint effects of climate and LULC changes on hydrologic responses in the forthcoming were higher than the variation trend of climate or LULC change alone. Climate change compared with LULC change has a higher impact on hydrologic responses. The results obtained provide further insight into future water balance, assistance in water resources planning and management.

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Section: Introductionmentioning

confidence: 99%

Hydrologic responses to climate and land-use/land-cover changes in the Bilate catchment, Southern Ethiopia

Kuma

Fufa

Demissie

2021

Journal of Water and Climate Change

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“…The total annual surface water availability over Anger sub-basin was estimated in my first paper and it was 3.396 BCM/year at base period [26]. Accordingly, the total domestic water requirement of the sub-basin will be 0.059274 BCM/year.…”

Section: Irrigation Water Demand Analysismentioning

confidence: 99%

Impact of Climate Change on Irrigated Crop Water Use of Selected Major Grown Crops and Water Demand for Irrigation: A Case of Anger Sub-Basin, Nile Basin of Ethiopia

Boru¹,

Regassa²

2020

IJEAST

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Understanding crop water use under changing climate condition is very important for developing irrigation projects to expand agricultural productivity. This study focus on climate change impact on irrigated crop water use of major grown crops and water demand for irrigation in Anger sub-basin, Ethiopia. Single GCM from Coupled Model Inter-comparison Project Phase 5 with single regional climate model and delta change bias correction approaches were used to project crop water requirement for the developed scenario over the study periods of 2020s and 2080s and demand analysis for the current conditions. The result of the analysis shows that at the 2020s crop water requirement of the irrigated crops changes from the baseline period by 1.7% to 3.83% and 1.5% to 3.8% for RCP 4.5 and RCP 8.5 respectively. At 2080s it changes from 3.36% to 7% and 3.58% to 12.7% for RCP 4.5 and RCP 8.5 respectively over the study area for all crops in the future respectively. Additionally, the demand analysis shows that at the current condition irrigation water demand was 2.096Bm 3 which takes a lion's share with about 62% followed by environmental water demand about 35% and domestic and livestock shares the lowest water demand of 1.72% and 1.475% respectively over the sub-basin. This indicates crop water requirement is increasing due to climate change which is directly influencing the water demand of other sectors. Therefore, in the future period decrement of water resource due to climate change requires water management practices to keep water demand in place to continue agricultural practices and future development plans of agriculture in the sub-basin.

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“…Several studies, including a study by Taye et al (2011), Dile et al (2013), Gebre (2015), Fentaw (2018), Worqlul et al (2018), and Boru et al (2019), studied the effects of climate change on the water resources of the Upper Blue Nile subbasin. Some studies such as Koch & Cherie (2013), Mellander et al (2013), Haile et al (2017), Roth et al (2018), Mengistu et al (2021), and Tariku et al (2021) also studied the potential impact of climate change on the water resources of the entire basin.…”

Section: Introductionmentioning

confidence: 99%

Future climate change and impacts on water resources in the Upper Blue Nile basin

Takele

Gebre

Gebremariam

et al. 2021

Journal of Water and Climate Change

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This study aims to assess the impact of climate change on the water resources of the Upper Blue Nile basin using an integrated climate and hydrological model. The impact of climate change on water resources is being assessed using the regional climate model (RCM) under the representative concentration pathway (RCP4.5 and RCP8.5) scenarios and the Soil and Water Assessment Tool (SWAT) hydrological model. Future climate scenarios have been developed for the 2030s (2021–2040) and the 2050s (2041–2060). The study found that the projected rainfall shows a decreasing trend and is not statistically significant, while the temperature shows an increasing trend and is statistically significant. Due to the sharp rise in temperature, the annual evapotranspiration increased by about 10.4%. This and the declining trend of rainfall will reduce streamflow up to 54%, surface runoff up to 31%, and water yield up to 31%. Climate change causes seasonal and annual fluctuations in the water balance components. However, the projected seasonal changes are much greater than the annual changes. Therefore, the results of this study will be useful to basin planners, policymakers, and water resources managers in developing adaptation strategies to offset the adverse effects of climate change in the Upper Blue Nile basin.

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Impacts of climate change on stream flow and water availability in Anger sub-basin, Nile Basin of Ethiopia

Cited by 33 publications

References 12 publications

Hydrologic responses to climate and land-use/land-cover changes in the Bilate catchment, Southern Ethiopia

Hydrologic responses to climate and land-use/land-cover changes in the Bilate catchment, Southern Ethiopia

Impact of Climate Change on Irrigated Crop Water Use of Selected Major Grown Crops and Water Demand for Irrigation: A Case of Anger Sub-Basin, Nile Basin of Ethiopia

Future climate change and impacts on water resources in the Upper Blue Nile basin

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