Respond Projects
Disaster Management Studies
Early warning of landslides
Landslides are mainly triggered by rainfall. Daily as well as antecedent (cumulative) rainfalls are responsible for saturation of soil and subsequent landslide in hilly areas. Therefore, a rainfall intensity-duration relationship was developed by NRSC for experimental landslide early warning. Bhuvan platform is currently used to disseminate daily landslide early warning for selected road corridors in the Himalayas. Daily 72 hrs rainfall forecast received from IMD or SAC (MOSDAC) is used as an input to the landslide early warning model. Then the available landslide susceptibility map is integrated with rainfall probability to generate landslide early warning in Bhuvan. Early warning in four categories (Warn, watch, advisory and no warning) are issued regularly through Bhuvan. Currently the landslide early warning system is operational experimentally in selected routes of Himachal Pradesh, Uttarakhand, Meghalaya, Assam and Mizoram. Further development of rainfall intensity duration relationship is required specific to different landslide prone areas of India.