AN IMPACT OF CLIMATIC CHANGE ON THE WATER BALANCE IN THE SELECTED SUB-BASINS IN CENTRAL RIFT VALLEY, ETHIOPIA

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41210%2F23%3A96575" target="_blank" >RIV/60460709:41210/23:96575 - isvavai.cz</a>

Result on the web

<a href="https://icefsss-2023.com/" target="_blank" >https://icefsss-2023.com/</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

AN IMPACT OF CLIMATIC CHANGE ON THE WATER BALANCE IN THE SELECTED SUB-BASINS IN CENTRAL RIFT VALLEY, ETHIOPIA

Original language description

Sub-Saharan Africa is a region sensitive to and highly affected by climate change. This study is focused on the Central Rift Valley Basin (CRVB), Ethiopia and explores the impacts of climate change on the major components of the water balance. The study basin (CRVB) is a vast closed area and thus it is divided into smaller sub-basins with known outlets (sub-basins: Ketar, Meki, and Shalla). The major components of the water balance are surface runoff (Q), water yield (WY) and evapotranspiration (ET). Projected climate data from the climate emission scenarios were used for the analyses. Representative Concentration Pathway (RCP) data from the MIROC-RCA4 ensemble driving climate models were downscaled, bias corrected and applied for the impact analyses. Climate scenario analyses for near term (2031-2060) and for long-term (2070-2099) periods were used to assess the conditions of the water balance components. The endo hydrogenic CRVB (divided into three sub-basins), and their respective hydroclimatic impacts were simulated with a calibrated Arc- SWAT (ArcGIS extension program used for basin modeling) models separately. SWAT (Soil Water Assessment Tool) is widely used model for analyzing the water balances of a basin using long-term meteorological and spatial data of a location. It is a physically-based deterministic, continuous, basin- scale simulation model (USDA). The future impacts simulated on the annual average basis are varying in the maximum ranges from -65.2% to +85.8% in Q, from -42.2% to +23.9% in WY and from -4.1% to +17.3% in ET compared to the baseline data outputs in the individual sub-basin. Water management options according to the water balance sensitivities to the climate impacts were proposed for each of the sub-basin. SWAT based studies aimed at a balanced water resources management in combination with agricultural practices within the CRVB are recommended for future applications.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

40104 - Soil science

Project

<a href="/en/project/QK1910086" target="_blank" >QK1910086: Controlled drainage (CD) as an effective approach for decreasing diffuse pollution sources from tile-drained agricultural watersheds</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů