Počet záznamů: 1  

Geomorphologically effective floods from moraine-dammed lakes in the Cordillera Blanca, Peru

  1. 1.
    0481707 - ÚVGZ 2019 RIV GB eng J - Článek v odborném periodiku
    Emmer, Adam
    Geomorphologically effective floods from moraine-dammed lakes in the Cordillera Blanca, Peru.
    Quaternary Science Reviews. Roč. 177, DEC (2017), s. 220-234. ISSN 0277-3791. E-ISSN 1873-457X
    Grant CEP: GA MŠMT(CZ) LO1415
    Institucionální podpora: RVO:86652079
    Klíčová slova: Andes * Documentary data * Geomorphology * glof * Lichenometry * Little Ice Age * Moraine-dammed lake * Outburst flood * South America
    Obor OECD: Environmental sciences (social aspects to be 5.7)
    Impakt faktor: 4.334, rok: 2017

    Outburst floods originating in moraine-dammed lakes represent a significant geomorphological process as well as a specific type of threat for local communities in the Cordillera Blanca, Peru (8.5°–10° S, 77°–78° W). An exceptional concentration of catastrophic floods has been reported from the Cordillera Blanca in the first half of 20th Century (1930s–1950s), leading to thousands of fatalities. The main objective of this paper is to provide a revised and comprehensive overview of geomorphologically effective floods in the area of interest, using various documentary data sources, verified by analysis of remotely sensed images (1948–2013) and enhanced by original field data. Verified events (n = 28, 4 not mentioned before) are analysed from the perspective of spatiotemporal distribution, pre-flood conditions, causes, mechanisms and geomorphological impacts as well as socioeconomical consequences, revealing certain patterns and similar features. GLOFs are further classified according to their magnitude: 5 extreme events, 8 major events and 15 minor events are distinguished, referring to the quantified geomorphological and socioeconomical impacts. Selected moraine dams and flood deposits are dated using lichenometric dating. Special attention is given to moraine dam breaches the most frequent type of water release with the most significant consequences. Selected major events and their consequences are studied in detail in a separate section. Finally, a general schematic model of lake formation, growth and post-flood evolution reflecting initial topographical setting and glacier retreat is introduced and the utilization of the obtained results is outlined.
    Trvalý link: http://hdl.handle.net/11104/0277218

     
     
Počet záznamů: 1  

  Tyto stránky využívají soubory cookies, které usnadňují jejich prohlížení. Další informace o tom jak používáme cookies.