Thanks to soil bioengineering in a village in north India, a submerged road was accessible in less than one week, according to officials
by Charu Bahri
On 14 August 2023, heavy rainfall in north India triggered flash floods and landslides, devastating the region. Kishori Lal, the sarpanch (head) of the Kothi Gehri village in the Himalayan state of Himachal Pradesh, recalls the events of that day: “Our link road connecting to the state highway and a few homes along that road were completely devastated.”
Torrential downpours in nearby Rewalsar, a picturesque lake town popular with tourists, led to several water bodies bursting their banks. The subsequent flooding and landslides wrecked homes in Lal’s village, necessitating the evacuation of hamlets and severing vital links to the outside world. With roads submerged, the ensuing closure of the Mandi-Rewalsar-Kalkhar Road and link roads left scores of tourists stranded and local communities isolated.
Amid this chaos, the resilience of Nog, a village in Bilaspur district, stands out. While roads across the region, including those in and around Kothi Gehri, remained closed, the road leading to Nog was accessible in less than one week, according to officials.
The reason lies in an innovative approach: soil bioengineering.
Concrete retaining walls 10ft high are the traditional go-to solution used to protect roads from hillside slopes. However, these structures leave exposed slopes vulnerable to erosion during intense rains, exacerbating the risk of landslides….
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