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Multi-method groundwater recharge estimation at Eshito micro-watershed, Rift Valley Basin in Ethiopia

Lookup NU author(s): Dr David Walker, John Gowing, Dr Geoffrey ParkinORCiD



This is the authors' accepted manuscript of an article that has been published in its final definitive form by Taylor and Francis , 2020.

For re-use rights please refer to the publisher's terms and conditions.


Understanding recharge processes is fundamental to improve sustainable groundwater resource management. Shallow groundwater (SGW) is being developed for multiple purposes in Ethiopia without consideration of monitoring. We established a citizen science-based hydro-meteorological monitoring network, with a focus on SGW recharge estimation, in Eshito micro-watershed, Ethiopia. Citizen scientists collected rainfall, groundwater-level and stream water-level data. We characterized the shallow aquifer using pumping tests. The data were used to estimate SGW recharge using three methods: chloride mass balance, water-level fluctuation (WLF) and baseflow separation. Approximately 20% and 35% of annual rainfall amount contributes to recharge based on the chloride mass balance and WLF results, respectively. Baseflow separation showed recharge values for the watershed vary from 38% to 28% of annual rainfall at the upstream and downstream gauging stations, respectively. This study shows that the recharge in previously unmonitored micro-watersheds can be studied if citizens are involved in data generation.

Publication metadata

Author(s): Mintamer F, Haile AT, Walker D, Gowing J, Parkin G

Publication type: Article

Publication status: Published

Journal: Hydrological Sciences Journal

Year: 2020

Volume: 65

Issue: 9

Pages: 1596-1605

Online publication date: 29/04/2020

Acceptance date: 24/03/2020

Date deposited: 18/06/2020

ISSN (print): 0262-6667

ISSN (electronic): 2150-3435

Publisher: Taylor and Francis


DOI: 10.1080/02626667.2020.1762887


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