[n° ou bulletin] 

Titre :	Volume 3 - Evaluation of sixteen reference evapotranspiration methods under sahelian conditions in the Senegal River Valley
Type de document :	texte imprimé
Auteurs :	Alpha B. Balde, Auteur ; Abdoulaye Sow, Auteur ; Mamadou K. N’Diaye, Auteur
Année de publication :	2015
Importance :	pp. 139–159
Présentation :	ill.
Langues :	Anglais (eng)
Catégories :	Environnement
Mots-clés :	Reference evapotranspiration methods  Evaluation  Senegal River basin  Sahel
Résumé :	However the Penman–Monteith (PM) equation is revealed the most accurate one; it necessitates several climatic parameters that are not always available mostly in the developing countries. The objective of this study was to evaluate the performance of 16 ETo equations against the ASCE-PM equation under the sahelian conditions at Ndiaye and Fanaye (Senegal) for alternate equation for ETo estimation with less climatic parameters. The results showed that the Hargreaves, modified Hargreaves, Ravazzani and Tralkovic equations systematically overestimated ETo with the highest percentage error of estimate (PE). In contrast, Makkink–Hansen, Oudin and Turc equations systematically underestimated ETo. Temperature based equations of Romenenko and Schendel performed relatively better at Fanaye with 5.5% and 9.6% PE, fitting slopes of 0.92 and 1.05, and mean ratio (MR) of 1.00 and 1.14, respectively. Mass transfer equations of Trabert and Mahringer also had good performance compared to the Penman–Monteith equation.
En ligne :	http://ac.els-cdn.com/S2214581815000063/1-s2.0-S2214581815000063-main.pdf?_tid=7 [...]
Permalink :	http://www.biblio.uadb.edu.sn/pmb/opac_css/index.php?lvl=bulletin_display&id=198

[n° ou bulletin]  Volume 3 - Evaluation of sixteen reference evapotranspiration methods under sahelian conditions in the Senegal River Valley [texte imprimé] / Alpha B. Balde, Auteur ; Abdoulaye Sow, Auteur ; Mamadou K. N’Diaye, Auteur . - 2015 . - pp. 139–159 : ill.
Langues : Anglais (eng)

Catégories :	Environnement
Mots-clés :	Reference evapotranspiration methods  Evaluation  Senegal River basin  Sahel
Résumé :	However the Penman–Monteith (PM) equation is revealed the most accurate one; it necessitates several climatic parameters that are not always available mostly in the developing countries. The objective of this study was to evaluate the performance of 16 ETo equations against the ASCE-PM equation under the sahelian conditions at Ndiaye and Fanaye (Senegal) for alternate equation for ETo estimation with less climatic parameters. The results showed that the Hargreaves, modified Hargreaves, Ravazzani and Tralkovic equations systematically overestimated ETo with the highest percentage error of estimate (PE). In contrast, Makkink–Hansen, Oudin and Turc equations systematically underestimated ETo. Temperature based equations of Romenenko and Schendel performed relatively better at Fanaye with 5.5% and 9.6% PE, fitting slopes of 0.92 and 1.05, and mean ratio (MR) of 1.00 and 1.14, respectively. Mass transfer equations of Trabert and Mahringer also had good performance compared to the Penman–Monteith equation.
En ligne :	http://ac.els-cdn.com/S2214581815000063/1-s2.0-S2214581815000063-main.pdf?_tid=7 [...]
Permalink :	http://www.biblio.uadb.edu.sn/pmb/opac_css/index.php?lvl=bulletin_display&id=198