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  Tropical glacier meltwater contribution to stream discharge: a case study in the Cordillera Blanca, Peru

Mark, B. G., & Seltzer, G. O. (2003). Tropical glacier meltwater contribution to stream discharge: a case study in the Cordillera Blanca, Peru. Journal of Glaciology, 49(165), 271-281.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000E-D0B6-4 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000E-D0B7-2
Genre: Journal Article

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BGC0618.pdf (Publisher version), 2MB
 
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Mark, B. G.1, Author              
Seltzer, G. O., Author
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1Research Group Paleo-Climatology, Dr. S. P. Harrison, Max Planck Institute for Biogeochemistry, Max Planck Society, escidoc:1497765              

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Free keywords: Climate-change Zongo glacier Bolivia Balance 20th-century Temperature Hydrology Evolution Storage Sweden
 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 Rio 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 Rio Santa watershed, also <10% glacierized, receives at least 12% of its annual discharge from melting glacier ice. Tributary watersheds to the Rio 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. [References: 39]

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 Dates: 2003
 Publication Status: Published in print
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 Identifiers: Other: BGC0618
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Title: Journal of Glaciology
Source Genre: Journal
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Publ. Info: Cambridge [etc.] : British Glaciological Society.
Pages: - Volume / Issue: 49 (165) Sequence Number: - Start / End Page: 271 - 281 Identifier: CoNE: http://pubman.mpdl.mpg.de/cone/journals/resource/954925413902
ISSN: 0022-1430