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Can a dam type of an alpine lake be derived from lake geometry? A negative result
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SYSNO ASEP 0542595 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Can a dam type of an alpine lake be derived from lake geometry? A negative result Author(s) Emmer, Adam (UEK-B) ORCID, RID, SAI
Cuřín, Vojtěch (UEK-B) SAINumber of authors 2 Source Title Journal of Mountain Science. - : Science Press - ISSN 1672-6316
Roč. 18, č. 3 (2021), s. 614-621Number of pages 8 s. Language eng - English Country CN - China Keywords glacial lake ; cordillera blanca ; outburst floods ; inventory ; susceptibility ; classification ; hazards ; Alpine lake ; High mountain lake ; GLOFs ; Glacial lake ; Moraine-dammed ; Bedrock-dammed ; Negative result ; Cordillera Blanca Subject RIV EH - Ecology, Behaviour OECD category Environmental sciences (social aspects to be 5.7) R&D Projects LO1415 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Research Infrastructure CzeCOS III - 90123 - Ústav výzkumu globální změny AV ČR, v. v. i. Method of publishing Open access Institutional support UEK-B - RVO:86652079 UT WOS 000627411100004 EID SCOPUS 85102372596 DOI 10.1007/s11629-020-6003-9 Annotation Glacial lake outburst floods (GLOFs) represent one of the most serious hazard and risk in deglaciating high mountain regions worldwide and the need for GLOF hazard and risk assessment is apparent. As a consequence, numerous region- and nation-wide GLOF assessment studies have been published recently. These studies cover large areas and consider hundreds to thousands of lakes, prioritizing the hazard posed by them. Clearly, certain simplification is required for executing such studies, often resulting in neglecting qualitative characteristics which would need manual assignment. Different lake dam types (e.g., bedrock-dammed, moraine-dammed) are often not distinguished, despite they control GLOF mechanism (dam overtopping/dam breach) and thus GLOF magnitude. In this study, we explore the potential of easily measurable quantitative characteristics and four ratios to approximate the lake dam type. Our dataset of 851 lakes of the Cordillera Blanca suggests that while variances and means of these characteristics of individual lake types differ significantly (F-test, t-test), value distribution of different geometrical properties can't be used for the originally proposed purpose along the spectra. The only promising results are obtained for extreme values (selected bins) of the ratios. For instance, the low width to length ratio indicates likely moraine-dammed lake while the high value of ratio indicating round-shape of the lake indicates increased likelihood of bedrock-dammed lake. Overall, we report a negative result of our experiment since there are negligible differences of relative frequencies in most of the bins along the spectra. Workplace Global Change Research Institute Contact Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Year of Publishing 2022 Electronic address https://link.springer.com/content/pdf/10.1007/s11629-020-6003-9.pdf
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