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(Article of periodic en Anglais - 2013)

Document title

Evaluating the performance of reservoirs in semi-arid catchments of Tigray : Tradeoff between water harvesting and soil and water conservation

Authors(s) and Affiliation(s)

TEKA D. (1 2) ; VAN WESEMAEL B. (2) ; VANACKER V. (2) ; POESEN J. (3) ; HALLET V. (4) ; TAYE G. (1 3) ; DECKERS J. (3) ; HAREGEWEYN N. (5) ;
(1) Dept. of Land Resource Management and Environmental Protection, Mekelle Univ., Mekelle, ETHIOPIE
(2) Georges Lemaitre Center for Earth and Climate Research, Earth and Life Inst. Univ. Catholique de Louvain, Louvain-la-Neuve, BELGIQUE
(3) Dept. Earth and Environmental Sciences, Katholieke Univ., Leuven, BELGIQUE
(4) Dept. of Geology, Univ., Namur, BELGIQUE
(5) Univ., Toronto, JAPON

Abstract

The AA. evaluated the performance of 2 micro dams in Tigray by analyzing rainfall characteristics, surface water inflows and combined evaporation and seepage losses. Given the scarcity of reliable meteorological stations, transfer of rainfall data from nearby stations to the dam sites was necessary. The rainfall magnitude and its annual distribution were considered for the transfer of the rainfall data. The latter was estimated based on a precipitation concentration index (PCI). Simple rainfall-runoff models were used to predict the inflow to the reservoirs. They slightly overestimated the monthly inflow for the catchment without soil and water conservation measures. In the catchment where soil and water conservation measures were implemented, the inflow was overestimated by a factor 3. The high losses of water through seepage and evaporation substantially decreased the irrigation capacity. This case study illustrates that an integrated assessment of the hydrological response in the catchment is necessary for an adequate design of water harvesting systems.

Source

Article of periodic

published at : Catena / ISSN 0341-8162

Editor : Catena, Cremlingen-Destedt - ALLEMAGNE (1973)

Millesime : 2013, vol. 110 [pp. 146-154]

Bibliographic references : 33 ref.

Collation : 9 fig., 3 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 16767

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1016/j.catena.2013.06.001

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2013
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