Assessment of hydrology and optimal water allocation under changing climate conditions: the case of Megech river sub basin reservoir, Upper Blue Nile Basin, Ethiopia

Asitatikie, Asimamaw Nigusie; Gebeyehu, Wondimagegn Zerihun

doi:10.1007/s40808-020-01024-0

Cited by 14 publications

(3 citation statements)

References 7 publications

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“…For example, Robi, et al [46] used SWAT and MIKE FLOOD to analyze the consequences of climate change on streamflow and map the flood hazard in the Ribb watershed. Furthermore, 12 studies used the HBV model to analyze: (1) the impact of rainfall on surface flow/streamflow/inflow, e.g., [39][40][41][42][43][44]99,100]; (2) the impact of land use/land cover on surface flow, e.g., [73]; and the contribution of ungauged catchment to the lake's water balance, e.g., [101]. MODFLOW, PED and WEAP were also used in a few studies in the Lake Tana basin.…”

Section: Modelling Approaches Of Studies In the Lake Tana Basinmentioning

confidence: 99%

To What Extent Is Hydrologic Connectivity Taken into Account in Catchment Studies in the Lake Tana Basin, Ethiopia? A Review

Astuti

Annys

Dessie

et al. 2022

Land

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Knowledge of hydrologic connectivity is important to grasp the hydrological response at a basin scale, particularly as changes in connectivity can have a negative effect on the environment. In the context of a changing climate, being able to predict how changes in connectivity will affect runoff and sediment transport is particularly relevant for land-use planning. Many studies on hydrology, geomorphology and climatology have been conducted in the Lake Tana Basin in Ethiopia, which is undergoing rapid development and significant environmental changes. This systematic literature review aims at assessing to what extent the hydrologic connectivity has been taken into account in such research, and to identify research gaps relevant to land and water management. On the Web of Science and Scopus databases, 135 scientific articles covering those topics were identified. Aspects of hydrologic connectivity were mostly implicitly taken into account based on process-based, statistical and descriptive models. Amongst the drivers of changing connectivity, the climate was covered by a large majority of publications (64%). Components of structural hydrologic connectivity were accounted for by considering geomorphology (54%) and soils (47%), and to a lesser extent, hydrography (16%) and geology (12%). Components of functional connectivity were covered by looking at surface water fluxes (61%), sediment fluxes (18%) and subsurface water fluxes (13%). While numerous studies of the Lake Tana Basin accounted for the hydrologic connectivity implicitly, these related predominantly to functional components. The structural components are given less attention, while in the context of a changing climate, better insights into their influence on the hydrologic seem most relevant. Better knowledge of the static aspect of connectivity is particularly important for targeting appropriate soil and water conservation strategies. Being able to explicitly assess the ‘structural connectivity’ is therefore of direct relevance for land management and land-use policy.

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Section: Modelling Approaches Of Studies In the Lake Tana Basinmentioning

confidence: 99%

To What Extent Is Hydrologic Connectivity Taken into Account in Catchment Studies in the Lake Tana Basin, Ethiopia? A Review

Astuti

Annys

Dessie

et al. 2022

Land

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“…Detailed description of the HBV model can be found in (Hakala et al 2018, Bergström 1976Burhan et al 2020b, Seibert andVis 2012). This model has successful applications in catchments with different climatic conditions and topographic features (Yacouba et al 2019;Mutsindikwa et al 2020;Asitatikie and Gebeyehu 2020;Usman et al 2021b, d).…”

Section: Hydrological Model Setup and Developmentmentioning

confidence: 99%

Modeling implications of climate induced streamflow changes on the fish species of the Soan River, Pakistan

Usman¹,

Ndehedehe

Ahmad³

2021

Model. Earth Syst. Environ.

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Climate change has significantly impacted the hydrological cycle in the rivers of Pakistan and the streamflow regimes of different rivers have witnessed noticeable flow alteration. These changes in stream flow affect aquatic biodiversity (e.g., freshwater fish species) and the productivity of freshwater ecosystems . This study therefore evaluates the streamflow alterations and their impacts on the fish species at the upstream and downstream of the Soan River in Pakistan. The hydrological model HBV-light was calibrated and validated for both up-(Chirah) and down-(Dhoke Pathan) stream gauged stations. The model was then forced with an ensemble of NEX-GDDP GCMs to simulate historic and future streamflow. Afterwards, changes in streamflow characteristics for two future periods against a historic period were assessed. Different ecologically relevant streamflow indices were used. The base flow at upstream and downstream was projected to increase under both the RCP 4.5 and RCP 8.5 emission scenarios for mid and end of century periods. Under the RCP 8.5, base flow was projected to increase with more inter-annual variability at upstream station, and changes depicted less variability for downstream under both emission scenarios. Number of high flow pulses were projected to decrease under both emission scenarios in both 2 future periods for upstream and downstream, however, high variability was depicted for upstream than downstream area. Duration of high flow pulses was also projected to increase under the RCP 8.5 for end of century period for both upstream and downstream. These projections of streamflow characteristics may have a marked (positive) influence on the habitat and ecological conditions for the fish species of the Soan River.

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“…The WEAP model has been applied in many studies to evaluate the reliability of irrigation systems in regions that intend to expand the agricultural area, to evaluate best management practices and their impact on the irrigation system efficiency, to assess the impact on water supply due to increase in wastewater discharge from industries and to analyze public policies and development plans. In addition, the WEAP model has been widely applied to assess future scenarios of climate change and its possible consequences on water balance, agricultural productivity and the future need to expand water supply to meet drought events (Gao et al, 2017;Mirdashtvan et al, 2021;Layani and Bakhshoodeh, 2021;Asitatikie and Gebeyehu, 2021;Noon et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Analyzing the impact of agricultural water-demand management on water availability in the Urubu River basin – Tocantins, Brazil

Volken¹,

Minoti²,

Alves³

et al. 2022

Rev. ambiente água

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The Urubu River is part of the Formoso River Basin located in Tocantins State in northern Brazil. It is an important agricultural region where irrigation has an important role in rice and soybean crops, cultivated during the rainy and the dry seasons, respectively. The high levels of irrigation associated with below-average precipitation in 2016 and in the following years resulted in a water crisis in the Urubu Basin, with serious consequences to the environment and the economy of the region. This work evaluated the impact of reducing irrigation on environmental flows in the Urubu River Basin using hydrological modeling in WEAP. Irrigation water demand scenarios were simulated and analyzed from July 2018 through June 2019. Results indicated the need to reduce 35% of all water withdrawls in order to avoid the interruption of flow in the Urubu River Basin. This percentage was even greater when only some of the farmers cooperated. The paper emphasized that it is important that all farmers be involved and cooperate to reduce their water withdrawal by any means, including improving their irrigation system efficiency. The water regulator may also motivate water withdrawal reduction by modifying water permits and applying water withdrawal restrictions during the dry season. Keywords: hydrological modeling, scenario analysis, water balance.

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Assessment of hydrology and optimal water allocation under changing climate conditions: the case of Megech river sub basin reservoir, Upper Blue Nile Basin, Ethiopia

Cited by 14 publications

References 7 publications

To What Extent Is Hydrologic Connectivity Taken into Account in Catchment Studies in the Lake Tana Basin, Ethiopia? A Review

To What Extent Is Hydrologic Connectivity Taken into Account in Catchment Studies in the Lake Tana Basin, Ethiopia? A Review

Modeling implications of climate induced streamflow changes on the fish species of the Soan River, Pakistan

Analyzing the impact of agricultural water-demand management on water availability in the Urubu River basin – Tocantins, Brazil

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