Testing satellite rainfall estimates time series for crop yield simulation of a rainfed cereal in West Africa

Leroux Louise, Baron Christian, Lo Seen Chong Danny, Bégué Agnès, Traoré Seydou. 2015. Testing satellite rainfall estimates time series for crop yield simulation of a rainfed cereal in West Africa. In : Analysis of Multitemporal Remote Sensing Images (Multi-Temp) 2015. LISTIC, University Savoie Mont-Blanc. Annecy : IEEE, 1-4. International Workshop on the Analysis of Multitemporal Remote Sensing Images (MultiTemp 2015). 8, Annecy, France, 22 Juillet 2015/24 Juillet 2015.

Url - éditeur : https://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=7235770&filter%3DAND%28p_IS_Number%3A7245742%29&pageNumber=3 / Url - éditeur : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=7245770

Résumé : In West Africa, the spatiotemporal variability of rainfall is often considered as one of the most important causes of food insecurity. Satellite Rainfall Estimates products provide synoptic, objective and timely information on the rainfall distribution and thus are particularly relevant tools for crop monitoring over large areas. This study assesses the accuracy of the TRMM3B2 daily product for characterizing seasonal rainfall distribution and its effects when modelling crop cereals in a South West Niger site. We found that the TRMM3B42 product was not able to accurately detect rainfall temporal distribution at station level, leading to a high dispersion of yield (RMSE = 231 kg ha-1) at station level when compared to the yield simulated with measured rainfall. However the bias is low (ME = 32 kg ha-1), resulting to a very good yield estimation when aggregated at the site level.

Mots-clés libres : Niger, Rainfall, Satellite, Crop yield, Crop model

Classification Agris : P40 - Météorologie et climatologie
U30 - Méthodes de recherche
U10 - Informatique, mathématiques et statistiques
F01 - Culture des plantes

Auteurs et affiliations

• Leroux Louise, CIRAD-ES-UMR TETIS (FRA) ORCID: 0000-0002-7631-2399
• Baron Christian, CIRAD-ES-UMR TETIS (FRA)
• Lo Seen Chong Danny, CIRAD-ES-UMR TETIS (FRA) ORCID: 0000-0002-7773-2109
• Bégué Agnès, CIRAD-ES-UMR TETIS (FRA)
• Traoré Seydou, AGRHYMET (NER)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/577543/)

Métriques

[ Page générée et mise en cache le 2021-07-06 ]