Hydrodynamic moraine-breach modeling and outburst flood routing - A hazard assessment of the South Lhonak lake, Sikkim

Sattar, Ashim; Goswami, Ajanta; Kulkarni, Anil V.

doi:10.1016/j.scitotenv.2019.02.388

Cited by 53 publications

(24 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Anticipation of the impact area and magnitude of GLOF cascades -and, as a consequence, also hazard mapping and the design of technical remediation measures -relies to a large extent on the application of computational mass flow models (GAPHAZ, 2017). Important progress was made since the mid-20th century: various models were developed, and have more recently been implemented in simulation software tools (Voellmy, 1955;Savage and Hutter, 1989;Iverson, 1997;Takahashi et al, 1992;Pitman and Le, 2005;McDougall and Hungr, 2004;Pudasaini and Hutter, 2007;Chisolm and McKinney, 2018). Most of these approaches represent single-phase mixture models.…”

mentioning

confidence: 99%

Reconstruction of the 1941 GLOF process chain at Lake Palcacocha (Cordillera Blanca, Peru)

Mergili

Pudasaini

Emmer

et al. 2020

Hydrol. Earth Syst. Sci.

View full text Add to dashboard Cite

Abstract. The Cordillera Blanca in Peru has been the scene of rapid deglaciation for many decades. One of numerous lakes formed in the front of the retreating glaciers is the moraine-dammed Lake Palcacocha, which drained suddenly due to an unknown cause in 1941. The resulting Glacial Lake Outburst Flood (GLOF) led to dam failure and complete drainage of Lake Jircacocha downstream, and to major destruction and thousands of fatalities in the city of Huaráz at a distance of 23 km. We chose an integrated approach to revisit the 1941 event in terms of topographic reconstruction and numerical back-calculation with the GIS-based open-source mass flow/process chain simulation framework r.avaflow, which builds on an enhanced version of the Pudasaini (2012) two-phase flow model. Thereby we consider four scenarios: (A) and (AX) breach of the moraine dam of Lake Palcacocha due to retrogressive erosion, assuming two different fluid characteristics; (B) failure of the moraine dam caused by the impact of a landslide on the lake; and (C) geomechanical failure and collapse of the moraine dam. The simulations largely yield empirically adequate results with physically plausible parameters, taking the documentation of the 1941 event and previous calculations of future scenarios as reference. Most simulation scenarios indicate travel times between 36 and 70 min to reach Huaráz, accompanied with peak discharges above 10 000 m3 s−1. The results of the scenarios indicate that the most likely initiation mechanism would be retrogressive erosion, possibly triggered by a minor impact wave and/or facilitated by a weak stability condition of the moraine dam. However, the involvement of Lake Jircacocha disguises part of the signal of process initiation farther downstream. Predictive simulations of possible future events have to be based on a larger set of back-calculated GLOF process chains, taking into account the expected parameter uncertainties and appropriate strategies to deal with critical threshold effects.

show abstract

mentioning

confidence: 99%

Reconstruction of the 1941 GLOF process chain at Lake Palcacocha (Cordillera Blanca, Peru)

Mergili

Pudasaini

Emmer

et al. 2020

Hydrol. Earth Syst. Sci.

View full text Add to dashboard Cite

show abstract

“…Of course, there are some other research directions, for example, Hajian et al studied runoff changes in a small forest catchment area in northern Iran, and derived several land-use change scenarios and the effects of high rainfall and high previous soil moisture (Hajian et al, 2019). By using the two-dimensional and one-dimensional hydrodynamic simulation method, combined with the calculation and analysis of the golf hydrological curve, Sattar et al discovered the settlement which may submerge both sides of the river (Sattar et al, 2019). Lyddon et al used the interaction of tidal bore and the Spatio-temporal variability of combined flood disasters to assess the variability of the upper end of the estuary under extreme water levels (Lyddon et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Evaluation of Flood and Flood in the Yellow River Basin Based on Gray Correlation Analysis

Han¹

2021

GEP

View full text Add to dashboard Cite

“…Remote sensing is widely regarded as a highly feasible technique for detecting historical GLOFs, monitoring the past and current status of glacial lakes, and predicting their future evolution (Quincey et al, 2005;Nie et al, 2017;Rounce et al, 2017;Sattar et al, 2019;Veh et al, 2019). More recently, imagery acquired from Unmanned Aerial Vehicles (UAV) and processed using digital photogrammetric reconstruction has been used to generate high spatial resolution orthomosaics and digital elevation models (DEM) which with to investigate moraine-dammed lake catchments and GLOF pathways (Westoby et al, 2012(Westoby et al, , 2014bWilson et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Reconstructing the Chongbaxia Tsho glacial lake outburst flood in the Eastern Himalaya: Evolution, process and impacts

Nie

Liu

et al. 2020

Geomorphology

View full text Add to dashboard Cite

This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

show abstract

Hydrodynamic moraine-breach modeling and outburst flood routing - A hazard assessment of the South Lhonak lake, Sikkim

Cited by 53 publications

References 69 publications

Reconstruction of the 1941 GLOF process chain at Lake Palcacocha (Cordillera Blanca, Peru)

Reconstruction of the 1941 GLOF process chain at Lake Palcacocha (Cordillera Blanca, Peru)

Comprehensive Evaluation of Flood and Flood in the Yellow River Basin Based on Gray Correlation Analysis

Reconstructing the Chongbaxia Tsho glacial lake outburst flood in the Eastern Himalaya: Evolution, process and impacts

Contact Info

Product

Resources

About