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Tropical glacier meltwater contribution to stream discharge: a case study in the Cordillera Blanca, Peru
dc.contributor.author | Mark, Bryan G. | |
dc.contributor.author | Seltzer, Geoffrey O. | |
dc.coverage.spatial | Cordillera Blanca | |
dc.date.accessioned | 2019-02-19T17:53:55Z | |
dc.date.available | 2019-02-19T17:53:55Z | |
dc.date.issued | 2003 | |
dc.identifier.citation | Mark, B. G. and Seltzer, G. O. (2003) Tropical glaciermeltwater contribution to stream discharge: a case study in the Cordillera Blanca, Peru. Journal of Glaciology, 49(165), 271-281. doi: https://doi.org/10.3189/172756503781830746 | es_PE |
dc.identifier.issn | ISSN: 0022-1430, ESSN: 1727-5652 | es_PE |
dc.identifier.uri | https://hdl.handle.net/20.500.12543/3366 | |
dc.description | Original abstract: Discharge measurements, climate observations and hydrochemical samples gathered monthly (1998/99) in the Yanamarey and Uruashraju glacier-fed catchments of the Cordillera Blanca, Peru, permit an analysis of the glacier meltwater contribution to stream-flow. These glacier catchments feed the Río Santa, which discharges into the Pacific Ocean. Based on a water-balance computation, glacier melt contributes an estimated 35% of the average discharge from the catchments. For comparison, a volumetric end-member mixing model of oxygen isotopes shows glacier melt contributes 30–45% to the total annual discharge. Based on stream geochemistry, discharge from the Yanamarey glacier catchment provides 30% of the annual volume discharged from the Querococha watershed, which is <10% glacierized. By analogy, the larger Río Santa watershed, also <10% glacierized, receives at least 12% of its annual discharge from melting glacier ice. Tributary watersheds to the Río Santa with larger fractions of glacier cover have less variable runoff and enhanced discharge, demonstrating that the glaciers effectively buffer stream discharge seasonally. With continued glacier melting, stream-flow will likely become more variable, and there will be less dry-season runoff. | es_PE |
dc.description | Artículo en acceso abierto | es_PE |
dc.description.abstract | Realiza un análisis de la contribución del agua de deshielo del glaciar al flujo de la corriente en base a las mediciones de descarga, las observaciones climáticas y las muestras hidroquímicas recogidas mensualmente (1998/99) en las cuencas de la Cordillera Blanca, Perú, alimentadas por los glaciares Yanamarey y Uruashraju. Señala que estas cuencas de glaciares alimentan el río Santa, que desemboca en el océano Pacífico, asimismo en base al cálculo de balance de agua, menciona que el derretimiento de los glaciares contribuye aproximadamente al 35% de la descarga promedio de las cuencas. Por otro lado, a modo de comparación, menciona que un modelo volumétrico de mezcla de isótopos de miembros finales muestra que la fusión del glaciar contribuye entre un 30 y un 45% a la descarga anual total. | es_PE |
dc.format | application/pdf | es_PE |
dc.language.iso | eng | es_PE |
dc.publisher | CUP | es_PE |
dc.relation.ispartofseries | Journal of Glaciology, 2008, Volume 49, Issue 165 pp 271-281 | es_PE |
dc.relation.uri | https://www.cambridge.org/core/journals/journal-of-glaciology/article/tropical-glacier-meltwater-contribution-to-stream-discharge-a-case-study-in-the-cordillera-blanca-peru/01418756F51185F7EC10729591EAC5C0 | |
dc.rights | info:eu-repo/semantics/openAccess | es_PE |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 International | * |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.source | Autoridad Nacional del Agua | es_PE |
dc.source | Repositorio institucional - ANA | es_PE |
dc.subject | Cambio climático | es_PE |
dc.subject | Monitoreo de lagunas y glaciares | es_PE |
dc.title | Tropical glacier meltwater contribution to stream discharge: a case study in the Cordillera Blanca, Peru | es_PE |
dc.type | info:eu-repo/semantics/article | es_PE |
dc.identifier.doi | https://doi.org/10.3189/172756503781830746 | es_PE |