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Erschienen in:
2025 | OriginalPaper | Buchkapitel
Impact of Cloudburst on Hydrological Condition of Kedarnath Slope
verfasst von : Nikita Joshi, Nabarun Dey, Ashwani Jain
Erschienen in: Proceedings of 9IYGEC 2023, Volume 2
Verlag: Springer Nature Singapore
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Abstract
Rainfall-triggered landslides and debris flow are the most common geological hazards in the Himalayan region due to the formation of Moraine-dammed lakes. Due to the loose structure of moraine, these lakes are weak and are susceptible to failure because of their unfavourable topography. One such event took place on 16 and 17 June 2013 which causes devastation in Kedarnath and massacred 6000 people. This paper presents a numerical analysis of the Kedarnath slope to find out the variation in pore water pressure and water content with rainfall events at varying depths. Most importance has been given to the area around Chorabari lake. Results show that hydrological factors led to the catastrophe. With the rainfall duration, the matric suction within the slope decreases, the water content increases, and thus the shear strengths of the slope reduces. It is also observed that all these hydrological changes were taking place at a shallow depth of less than 5 m. At depths greater than or equal to 5 m changes are negligible.