Horizon / Plein textes La base de ressources documentaires de l'IRD

IRD

 

Publications des scientifiques de l'IRD

Satge Frédéric, Hussain Y., Xavier A., Zola R. P., Salles L., Timouk Franck, Seyler Frédérique, Garnier J., Frappart F., Bonnet Marie-Paule. (2019). Unraveling the impacts of droughts and agricultural intensification on the Altiplano water resources. Agricultural and Forest Meteorology, 279, art. 107710 [13 p.]. ISSN 0168-1923

Accès réservé (Intranet IRD) Demander le PDF

Lien direct chez l'éditeur doi:10.1016/j.agrformet.2019.107710

Titre
Unraveling the impacts of droughts and agricultural intensification on the Altiplano water resources
Année de publication2019
Type de documentArticle référencé dans le Web of Science WOS:000500197400021
AuteursSatge Frédéric, Hussain Y., Xavier A., Zola R. P., Salles L., Timouk Franck, Seyler Frédérique, Garnier J., Frappart F., Bonnet Marie-Paule.
SourceAgricultural and Forest Meteorology, 2019, 279, p. art. 107710 [13 p.]. p. art. 107710 [13 p.] ISSN 0168-1923
RésuméDuring the last decades, agriculture has drastically increased over the South American Andean Plateau (Altiplano), resulting in extensive changes in land cover from native vegetation to essentially Quinoa crop. Along with climatic variability, these land use changes appear as a catalyst in worsening the already existing drought events and water scarcity processes. Hence, understanding their relative contributions to the regional desertification process is crucial for sustainable water-use adaptation, but also is quite ambiguous because of water resource data scarcity over the Altiplano. Therefore, in the present study, an attempt to measure the impact of severe droughts and agricultural intensification on the water resources has been made using remote sensing datasets. The first step was dedicated to the validation of newly released CHIRPS v.2 precipitation and GLEAM v.3 potential evapotranspiration products by comparing their estimates with the results obtained from gauges data. Then, the Standardized Precipitation Index (SPI) was used to describe past hydro-meteorological drought events in terms of their spatial extent, duration, intensity and their impacts on the regional water resources. Finally, the dynamic trends in the spatial extent of the Quinoa crop and the meteorological conditions derived from CHIRPS v.2 and GLEAM v.3 were compared with the Vegetation Condition Index (VCI) and the Total Water Storage (TWS) derived from AVHRR and GRACE data respectively, to observe the respective influence of agriculture and climate variability on the regional hydrological system. A significant increase in Quinoa crop extent is observed from 2001 which corresponds to a significant decrease in regional VCI and TWS. Based on this trend, agriculture appears as a contributing factor in the water scarcity process over the Altiplano. The outcomes of this study will contribute to local decision making for a better water management and hydro-meteorological monitoring system.
Plan de classementHydrologie [062] ; Bioclimatologie [072] ; Télédétection [126]
Descr. géo.BOLIVIE ; PEROU ; ANDES
LocalisationFonds IRD [F B010077390]
Identifiant IRDfdi:010077390
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010077390

Export des données

Disponibilité des documents

Télechargment fichier PDF téléchargeable

Lien sur le Web lien chez l'éditeur

Accès réservé en accès réservé

HAL en libre accès sur HAL


Accès aux documents originaux :

Le FDI est labellisé CollEx

Accès direct

Bureau du chercheur

Site de la documentation

Espace intranet IST (accès réservé)

Suivi des publications IRD (accès réservé)

Mentions légales

Services Horizon

Poser une question

Consulter l'aide en ligne

Déposer une publication (accès réservé)

S'abonner au flux RSS

Voir les tableaux chronologiques et thématiques

Centres de documentation

Bondy

Montpellier (centre IRD)

Montpellier (MSE)

Cayenne

Nouméa

Papeete

Abidjan

Dakar

Niamey

Ouagadougou

Tunis

La Paz

Quito