Application des indicateurs “approvisionnement relatif en eau” et “productivité de l'eau” à l'analyse des performances des petits périmètres irrigués au Burkina Faso
2001; Wiley; Volume: 50; Issue: 4 Linguagem: Inglês
10.1002/ird.21
ISSN1531-0353
AutoresYoussouf Dembélé, Sibiry Ouattara, Amadou Keïta,
Tópico(s)Agriculture and Rural Development Research
ResumoAbstract The performance of three small irrigation systems located in the central and the centre eastern regions of Burkina Faso has been analysed at the field level, using two performance indicators: Relative water supply (RWS) to assess the adequacy of “irrigation supply and effective rainfall” and the crop water requirement; Water productivity ( P e ) to assess water use efficiency. The results show that the average value of RWS of wet‐season rice fields is very high (1.3) at Gorgo, medium (1.04) at Mogtedo and very low (0.75) at Itenga. The average value of water productivity is high (0.88 kg m −3 ) at Itenga, medium (0.65 kg m −3 ) at Mogtedo and low (0.34 kg m −3 ) at Gorgo. The relationship of RWS to water productivity shows that it would be possible to save irrigation water without decreasing rice yields significantly. However, no significant correlation has been found between the RWS values and the yield values. Copyright © 2001 John Wiley & Sons, Ltd.
Referência(s)