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Preliminary Results of Hybrid Bathymetry and GLOF Risk Assessment for Neelkanth Lake, Lahaul Himalaya, India


Affiliations
1 Department of Geography, Government College, Dujana, Jhajjar 124 102, India
2 Centre for the Study of Regional Development, Jawaharlal Nehru University, New Delhi 110 067, India
3 Department of Geography, Dr Hari Singh Gour Central University, Sagar 470 003, India
4 Department of Geography, Government College, Dujana,Jhajjar 124 102, India
 

In this study, field-based bathymetry of Neenkanth lake in the Lahaul Himalaya, India, was carried out. Volume estimation and calculation of peak discharge, and the results thus obtained have been compared with empirically derived values. Average morphological characteristics of this lake are the depth of 5.78 m, area of 22,925.80 m2 and volume of 132,511.12 m3. The quantitative glacial lake outburst flood (GLOF) characteristics derived from the empirical models were found to be much higher than the measured values of the lake. A qualitative approach was adopted to determine dam breach assessment indicators, viz. dam type, dam geometry, height of the freeboard, etc. GLOF potential was found to be high considering majority of qualitative parameters; however, field measurements indicate a low risk.

Keywords

Bathymetry, Dam Breach, Glacier Retreat, Lake Volume, Risk Assessment.
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  • Preliminary Results of Hybrid Bathymetry and GLOF Risk Assessment for Neelkanth Lake, Lahaul Himalaya, India

Abstract Views: 154  |  PDF Views: 72

Authors

Sanjay Deswal
Department of Geography, Government College, Dujana, Jhajjar 124 102, India
Milap Chand Sharma
Centre for the Study of Regional Development, Jawaharlal Nehru University, New Delhi 110 067, India
Rakesh Saini
Department of Geography, Dr Hari Singh Gour Central University, Sagar 470 003, India
Padma Dalal
Department of Geography, Government College, Dujana, Jhajjar 124 102, India
Parmod Kumar
Department of Geography, Government College, Dujana,Jhajjar 124 102, India

Abstract


In this study, field-based bathymetry of Neenkanth lake in the Lahaul Himalaya, India, was carried out. Volume estimation and calculation of peak discharge, and the results thus obtained have been compared with empirically derived values. Average morphological characteristics of this lake are the depth of 5.78 m, area of 22,925.80 m2 and volume of 132,511.12 m3. The quantitative glacial lake outburst flood (GLOF) characteristics derived from the empirical models were found to be much higher than the measured values of the lake. A qualitative approach was adopted to determine dam breach assessment indicators, viz. dam type, dam geometry, height of the freeboard, etc. GLOF potential was found to be high considering majority of qualitative parameters; however, field measurements indicate a low risk.

Keywords


Bathymetry, Dam Breach, Glacier Retreat, Lake Volume, Risk Assessment.



DOI: https://doi.org/10.18520/cs%2Fv119%2Fi9%2F1555-1557