Effect of climate change on reservoir water balance and irrigation water demand: a case of Gidabo irrigation project, Rift Valley Basin, Ethiopia

Mana, Tegegn Takele; Abebe, Berhanu Wegayehu; Hatiye, Samuel Dagalo

doi:10.1007/s10661-023-11484-3

Cited by 5 publications

(1 citation statement)

References 66 publications

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“…The CROPWAT 8.0 model is an irrigation software developed by FAO for quantifying crop water requirements using the Penman-Monteith method. This model can also be utilized for projecting future irrigation water demand (Sunil et al, 2021;Mana et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

Estimation of Crop Water Requirement for Tomato Plant in Afgoye-Somalia, Using CROPWAT 8.0 Model

IBRAHIM

2023

Black Sea Journal of Agriculture

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Crop water requirement or crop evapotranspiration is a vital parameter for irrigation, and it is necessary to determine the quantity of water to be applied for irrigation and develop an effective irrigation schedule. CROPWAT 8.0, decision-support computer software developed by the United Nations Food Agriculture Organization, is used to calculate crop water requirements. In this paper, the CROPWAT 8.0 model was used to estimate the water requirements of tomato crops in Afgoye. The model estimated that the reference evapotranspiration throughout the year reaches 1927.6 mm and the daily reference evapotranspiration is 5.29 mm. The total annual rainfall reaches 584.0 mm with an effective rainfall of 511.1 mm. The total crop evapotranspiration during the growing period was estimated at 678.2 mm and the total irrigation amount was calculated as 452.3 mm with an effective rainfall of 230.6 mm. During the growing period, the net and gross irrigation reaches 392.9 and 561.3 mm respectively. Field experiments should be conducted in the same season and cropping patterns to validate the accuracy of the crop water requirement prediction.

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Section: Introductionmentioning

confidence: 99%

Estimation of Crop Water Requirement for Tomato Plant in Afgoye-Somalia, Using CROPWAT 8.0 Model

IBRAHIM

2023

Black Sea Journal of Agriculture

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Assessment of climate change impact on meteorological variables of Indravati River Basin using SDSM and CMIP6 models

Challa,

Renganathan

2024

Environ Monit Assess

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Examining the Accuracy of Using a Single Short-Term Historical Flow Period to Assess the Nile’s Downstream Water Deficit from GERD Filling: A Technical Note

Heggy,

Ramah,

Abotalib

2023

Earth Syst Environ

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Increasing water and energy demands, hydroclimatic fluctuations, damming, and usage rights disputes present major challenges in managing transboundary rivers worldwide. Of particular interest is the Eastern Nile River Basin (ENRB), which is subject to broad debate over which modeling approach should be applied to resolve the disparities in transboundary water management among the river’s riparian nations, under increased upstream damming. Several studies have simulated the downstream High Aswan Dam (HAD) storage change during the Grand Ethiopian Renaissance Dam (GERD) filling under different hydrological conditions. However, their findings diverge regarding the impacts of GERD filling on HAD storage, especially when considering a specific, naturalized, historical 10-year period to represent the average flow condition used, as a benchmark for assessing potential downstream impacts. Our extended analysis of the Nile flow historical records demonstrates that considering a single historical 10-year period to simulate the downstream water budget, as performed in Wheeler et al. (Nat Commun 11:5222, 2020, https://doi.org/10.1038/s41467-020-19089-x), widely communicated to policymakers as a robust proof that GERD filling will not generate a deficit at HAD under average flow conditions, is inconclusive as it strongly depend on the selection of the historical inflow period, due to the river high interannual flow variability. Our simulation results of 20 average/near average historical flow periods in Wheeler et al. (Nat Commun 11:5222, 2020, https://doi.org/10.1038/s41467-020-19089-x)’s datasheet indicates that 60% of them generates a downstream water deficit ranging from 0.5 to 14.5 BCM under the same modeling conditions and filling policy. Therefore, considering the simulation results of multiple flow sequences is crucial for accurately reflecting the impact of the Nile’s high interannual flow variability on downstream water deficit assessments, thereby settling the disparities in transboundary water management forecasts for the impacts of GERD filling and operation.

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Effect of climate change on reservoir water balance and irrigation water demand: a case of Gidabo irrigation project, Rift Valley Basin, Ethiopia

Cited by 5 publications

References 66 publications

Estimation of Crop Water Requirement for Tomato Plant in Afgoye-Somalia, Using CROPWAT 8.0 Model

Estimation of Crop Water Requirement for Tomato Plant in Afgoye-Somalia, Using CROPWAT 8.0 Model

Assessment of climate change impact on meteorological variables of Indravati River Basin using SDSM and CMIP6 models

Examining the Accuracy of Using a Single Short-Term Historical Flow Period to Assess the Nile’s Downstream Water Deficit from GERD Filling: A Technical Note

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