La vitrine de diffusion des publications et contributions des chercheurs de l'ÉTS
RECHERCHER

Glacier recession and water resources in Peru’s Cordillera Blanca

Baraër, Michel et Mark, Bryan G. et Mckenzie, Jeffrey M. et Condom, Thomas et Bury, Jeffrey et Huh, Kyung-In et Portocarrero, Cesar et Gómez, Jesús et Rathay, Sarah. 2012. « Glacier recession and water resources in Peru’s Cordillera Blanca ». Journal of Glaciology, vol. 58, nº 207. p. 134-150.
Compte des citations dans Scopus : 62.

[img]
Prévisualisation
PDF
Baraer M. 2012 6295 Glacier recession and water resources.pdf - Version acceptée
Licence d'utilisation : Tous les droits réservés aux détenteurs du droit d'auteur.

Télécharger (1MB) | Prévisualisation

Résumé

The tropical glaciers of the Cordillera Blanca, Peru, are rapidly retreating, resulting in complex impacts on the hydrology of the upper Río Santa watershed. The effect of this retreat on water resources is evaluated by analyzing historical and recent time series of daily discharge at nine measurement points. Using the Mann–Kendall nonparametric statistical test, the significance of trends in three hydrograph parameters was studied. Results are interpreted using synthetic time series generated from a hydrologic model that calculates hydrographs based on glacier retreat sequences. The results suggest that seven of the nine study watersheds have probably crossed a critical transition point, and now exhibit decreasing dry-season discharge. Our results suggest also that once the glaciers completely melt, annual discharge will be lower than present by 2–30% depending on the watershed. The retreat influence on discharge will be more pronounced during the dry season than at other periods of the year. At La Balsa, which measures discharge from the upper Río Santa, the glacier retreat could lead to a decrease in dry-season average discharge of 30%.

Type de document: Article publié dans une revue, révisé par les pairs
Professeur:
Professeur
Baraër, Michel
Affiliation: Génie de la construction
Date de dépôt: 12 déc. 2013 20:09
Dernière modification: 21 nov. 2016 20:46
URI: http://espace2.etsmtl.ca/id/eprint/6295

Actions (Authentification requise)

Dernière vérification avant le dépôt Dernière vérification avant le dépôt

Statistiques de téléchargement

Plus de statistiques ...