GSI experts suggest relocation of subsidence-hit villagers in Lahaul
Lindur village in Lahaul and Spiti district is facing a critical situation due to ground instability, prompting Geological Survey of India (GSI) experts to recommend immediate action to safeguard it. Following a reconnaissance field visit, several preliminary recommendations have been outlined to address the ongoing challenges posed by landslides, ground cracks and structural damage to homes.
According to GSI experts, the village, situated on unconsolidated debris, is showing multiple longitudinal cracks, particularly near active slide zones. Experts have warned that any triggering events such as excessive glacier melt or sudden cloudbursts could lead to severe slope instability. To protect residents, it is advised that those living in homes suffering structural damage as well as those located near expanding landslide areas, be relocated to safer locations. Local authorities and disaster management officials have been urged to prioritise relocation.
Village located on debris, showing cracks
- Lindur village, situated on unconsolidated debris, is showing cracks, particularly near active slide zones, say GSI experts
- They have warned that events such as excessive glacial melt or cloudbursts can lead to severe slope instability
- Disaster management officials have been urged to prioritise relocation
- Experts suggest implementation of real-time ground deformation monitoring systems for early warning of potential failures
In the short term, sealing cracks with impervious materials is recommended to prevent further water ingress and subsequent soil saturation. Additionally, a monitoring system must be established to track the recurrence of cracks and subsidence in the area with urgent reports to the district administration about new developments.
To enhance safety, the experts have suggested the implementation of real-time ground deformation monitoring systems using InSAR, DGPS and extensometers, accompanied by an alarm system for early warning of potential failures. Given the potential for smaller failures to destabilise larger debris masses, proper toe supports along the landslide''s base are essential to prevent further erosion and slippage, particularly during heavy rainfall.
The construction of retention walls along the left bank of the Jahlma Nala is also recommended to contain debris materials and prevent slips. Managing water seepage is critical; hence, the installation of a controlled water supply network, replacing open channels, could help limit soil saturation.
"Furthermore, continuous monitoring of glacier runoff near Lindur is vital for understanding water flow dynamics in the area. Sustainable agricultural practices, such as drip irrigation and soil moisture monitoring should be promoted to optimise water usage while ensuring local farming viability," they suggested.
"To foster a proactive community response, awareness programs on the scientific causes of ground cracks and the importance of monitoring should be implemented. These programs can help alleviate public panic and encourage cooperation in monitoring efforts," they said.
According to GSI experts report, lastly, the establishment of rain gauge stations and regular data collection is essential for understanding rainfall patterns that contribute to ground instability.
To sum up, a comprehensive approach involving relocation, monitoring, structural reinforcement and community engagement is vital to mitigate risks and stabilise Lindur village against future geological threats has been suggested by the GSI experts in its report.
Deputy Commissioner, Lahaul and Spiti, Rahul Kumar said that a few recommendations of the GSI experts had been implemented for public safety, while efforts were underway to identify land for the rehabilitation of the affected villagers at safe places in the district.
