Isro landslide atlas says 13 Kerala districts amongst high 50 susceptible areas | Kochi Information

Wayanad is positioned thirteenth in Isro’s Landslide Atlas of India-2023

KOCHI: Isro‘s Landslide Atlas of India-2023, which incorporates landslide publicity evaluation carried out in mountainous areas, has positioned 13 of Kerala’s 14 districts among the many high 50 susceptible areas within the nation.
The Atlas ranks 147 landslide-prone districts in 17 states and two Union Territories in line with the very best landslide density and highest inhabitants publicity.The Northwest Himalayas witness 66.5% of landslides in India, adopted by the Northeast Himalayas (18.8%) and the Western Ghats (14.7%). The districts have been ranked for his or her publicity to landslides by way of socio-economic parameters.
Primarily based on publicity to landslides, Wayanad is positioned thirteenth within the Atlas. Thrissur district of the state in ranked 3, Palakkad 5, Malappuram 7, Kozhikode 10, Ernakulam 15, Idukki 18, Kottayam 24, Kannur 26, Thiruvananthapuram 28, Pathanamthitta 33, Kasaragod 44 and Kollam 48. The 14th district, Alappuzha, additionally figures on the listing, at 138th place. The database contains three kinds of landslide stock – seasonal, event-based and route-wise – for the 1998-2022 interval.
Seasonal stock accommodates a pan-India landslide database equivalent to the 2014 and 2017 wet season in India. Occasion-based stock accommodates particulars of a number of the main triggering occasions, resembling Kedarnath (2013) and Kerala (2018) floods, Sikkim earthquake (2011) in addition to a couple of giant valley blocking landslides.
Route-wise stock accommodates particulars of landslides alongside chosen routes of vacationer and pilgrimage significance.
The event-based stock from 2000-2021 says that Kerala noticed a complete of 6,039 occasions – 5,191 in 2018, 756 in 2019, 9 in 2020 and 29 in 2021. Within the 2014 and 2017 monsoon seasons, there have been 9 and 45 landslides, respectively.
The Atlas states that rainfall threshold for landslides is the worth which, when reached or exceeded, is more likely to set off landslides. Rainfall thresholding for slope failure could be established utilizing process-based, empirical or statistical approaches, it says. Historic knowledge on landslide-causing rainfall occasions and the corresponding landslide data can be utilized to determine rainfall thresholds.
It states that vulnerability of inhabitants and households is extra vital within the Western Ghats because of the very excessive inhabitants and family density, particularly in Kerala, even when fewer landslides exist than within the Himalayan areas. The steep escarpments of the Western Ghats document occurrences of landslides, however these are primarily managed by the soil cowl on the slopes.