Infilled lakes (P ampas) of the Cordillera Blanca, Peru: Inventory, sediment storage, and paleo outbursts.
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| Title: | Infilled lakes (P ampas) of the Cordillera Blanca, Peru: Inventory, sediment storage, and paleo outbursts. |
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| Authors: | Emmer, Adam1 (AUTHOR) adam.emmer@uni-graz.at |
| Source: | Progress in Physical Geography: Earth & Environment. Apr2024, Vol. 48 Issue 2, p208-230. 23p. |
| Subjects: | Lakes, Sediments, Inventories, Glacial lakes, Glacial landforms, Mountains |
| Geographic Terms: | Peru, Pampas (Argentina) |
| Abstract: | Infilled lakes are a prevalent geomorphic feature in the intricate high mountain landscape of the Cordillera Blanca, Peru. Despite their apparent geomorphic, hydrological, and ecological importance, a systematic inventory of these areas has been lacking. This study presents an inventory of infilled lakes in the Cordillera Blanca. A total of 962 infilled lake polygons have been manually mapped, covering an area of nearly 90 km2 (the area of individual mapped polygons ranges from 0.001 km2 to 1.760 km2), more than double the area of existing lakes (40 km2) and the majority of flat areas (62% of areas with slope ≤5°). The study reveals that infilled bedrock-dammed lakes are the most common type (42%), while moraine-dammed lakes account for the majority of the infilled lake area (52%) and sediment volume (52% to 57%). Considering high uncertainty of infilled basins' morphology, the estimated sediment volume of infilled lakes ranges between 0.9 km3 and 2.3 km3 (compared to 0.79 km3 to 1.15 km3 of water stored in existing lakes). The case study of Lake Aguascocha catchment reveals a mean sediment yield of 0.64 to 1.63∙106 m3∙km−2 during the past 10.7 ± 0.3 ka, that is, a mean annual sediment yield of 58.5 to 156.4 m3∙km−2∙yr−1. Furthermore, 65 locations where preserved geomorphic evidence indicates possible outburst floods in the past are identified. These areas are particularly important for understanding patterns of lake outburst occurrence on longer timescales than traditionally considered in lake outburst flood hazard studies. The dataset presented in this study is intended to serve as a basis for identifying sites suitable for further site-specific paleo-geographical, sedimentological, geochronological as well as broader mountain landscape evolution studies. [ABSTRACT FROM AUTHOR] |
| Copyright of Progress in Physical Geography: Earth & Environment is the property of Sage Publications, Ltd. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 176581774 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Infilled lakes (P ampas) of the Cordillera Blanca, Peru: Inventory, sediment storage, and paleo outbursts. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Emmer%2C+Adam%22">Emmer, Adam</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> adam.emmer@uni-graz.at</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Progress+in+Physical+Geography%3A+Earth+%26+Environment%22">Progress in Physical Geography: Earth & Environment</searchLink>. Apr2024, Vol. 48 Issue 2, p208-230. 23p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Lakes%22">Lakes</searchLink><br /><searchLink fieldCode="DE" term="%22Sediments%22">Sediments</searchLink><br /><searchLink fieldCode="DE" term="%22Inventories%22">Inventories</searchLink><br /><searchLink fieldCode="DE" term="%22Glacial+lakes%22">Glacial lakes</searchLink><br /><searchLink fieldCode="DE" term="%22Glacial+landforms%22">Glacial landforms</searchLink><br /><searchLink fieldCode="DE" term="%22Mountains%22">Mountains</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Peru%22">Peru</searchLink><br /><searchLink fieldCode="DE" term="%22Pampas+%28Argentina%29%22">Pampas (Argentina)</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Infilled lakes are a prevalent geomorphic feature in the intricate high mountain landscape of the Cordillera Blanca, Peru. Despite their apparent geomorphic, hydrological, and ecological importance, a systematic inventory of these areas has been lacking. This study presents an inventory of infilled lakes in the Cordillera Blanca. A total of 962 infilled lake polygons have been manually mapped, covering an area of nearly 90 km2 (the area of individual mapped polygons ranges from 0.001 km2 to 1.760 km2), more than double the area of existing lakes (40 km2) and the majority of flat areas (62% of areas with slope ≤5°). The study reveals that infilled bedrock-dammed lakes are the most common type (42%), while moraine-dammed lakes account for the majority of the infilled lake area (52%) and sediment volume (52% to 57%). Considering high uncertainty of infilled basins' morphology, the estimated sediment volume of infilled lakes ranges between 0.9 km3 and 2.3 km3 (compared to 0.79 km3 to 1.15 km3 of water stored in existing lakes). The case study of Lake Aguascocha catchment reveals a mean sediment yield of 0.64 to 1.63∙106 m3∙km−2 during the past 10.7 ± 0.3 ka, that is, a mean annual sediment yield of 58.5 to 156.4 m3∙km−2∙yr−1. Furthermore, 65 locations where preserved geomorphic evidence indicates possible outburst floods in the past are identified. These areas are particularly important for understanding patterns of lake outburst occurrence on longer timescales than traditionally considered in lake outburst flood hazard studies. The dataset presented in this study is intended to serve as a basis for identifying sites suitable for further site-specific paleo-geographical, sedimentological, geochronological as well as broader mountain landscape evolution studies. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Progress in Physical Geography: Earth & Environment is the property of Sage Publications, Ltd. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1177/03091333241227799 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 23 StartPage: 208 Subjects: – SubjectFull: Lakes Type: general – SubjectFull: Sediments Type: general – SubjectFull: Inventories Type: general – SubjectFull: Glacial lakes Type: general – SubjectFull: Glacial landforms Type: general – SubjectFull: Mountains Type: general – SubjectFull: Peru Type: general – SubjectFull: Pampas (Argentina) Type: general Titles: – TitleFull: Infilled lakes (P ampas) of the Cordillera Blanca, Peru: Inventory, sediment storage, and paleo outbursts. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Emmer, Adam IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 04 Text: Apr2024 Type: published Y: 2024 Identifiers: – Type: issn-print Value: 03091333 Numbering: – Type: volume Value: 48 – Type: issue Value: 2 Titles: – TitleFull: Progress in Physical Geography: Earth & Environment Type: main |
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