Work

Integrated analysis of water storage variability using GRACE and SHETRAN modelling system in the Central Rift Valley basin of Ethiopia

Year: 2025

Type: article

Abstract: The Central Rift Valley (CRV) basin in Ethiopia has undergone significant hydrological changes driven by climate variability, population growth, and agricultural intensification. However, the understanding of long-term water storage dynamics remains limited due to a lack of in-situ data, which continues to hinder effective water resource management. GRACE satellite observations combined with physically based hydrological modelling were used to assess Total Water Storage Anomalies (TWSA), Groundwater Storage Anomalies (GWSA), and the often-neglected surface water storage component of the hydrological mass balance. Results reveal an increase in TWSA after 2010, which is attributed to enhanced rainfall from an unusual clustering of ENSO and IOD events and to limited groundwater abstraction. Integration of satellite data and modelling provides insight into the temporal dynamics of groundwater storage. This study highlights the need for integrated water resources management strategies that account for climatic variability and increasing anthropogenic pressures in vulnerable basins like the CRV.

Source: Geocarto International

DOI: 10.1080/10106049.2025.2609391

Authors: Tsedenya Tafesse, Greg O'Donnell, Claire Walsh, Jaime Amezaga

Institution: Newcastle University

Language: English

Topic: Geophysics and Gravity Measurements

Subfield: Oceanography

Field: Earth and Planetary Sciences

Domain: Physical Sciences

SDGs: Climate action, Clean water and sanitation

Open Access status: gold

Estimated APC paid: $2,390