- Odisha has come out with a unique flood hazard atlas on the basis of historic flood inundation captured through satellite imagery over the period from 2001 to 2018.
- The flood hazard atlas is expected to help the State to manage floods more efficiently.
- The National Remote Sensing Centre (NRSC) of ISRO had taken the study on flood hazard zonation for Odisha.
Floods in Odisha
- The entire coastal belt of Odisha is vulnerable to both storm surges and river flooding. Also, few districts in the western and southern part of Odisha are prone to flash floods.
- According to NRSC, about 9% of land in Odisha was affected by floods during 2001-2018.
- Flood prone rivers of Odisha: Mahanadi, Brahmani, Baitarani, Subarnarekha, Rushikulya, Vamsadhara and Budhabalanga.
- Damages due to floods are caused mainly by the Mahanadi, the Brahmani and the Baitarani, which have a common delta where floodwaters intermingle.
- Out of total flood-affected area, about 2.8 lakh hectares of land falls under high (inundated seven-nine times) to very high (inundated 10-14 times) flood hazard categories.
Flood Hazard Atlas
- A large number of satellite images acquired over 18 years (2001-2018) were analysed and flood layers were extracted.
- All the flood layers corresponding to a year are combined as one inundation layer, so that this layer represents the maximum flooded area in one year.
- All such combined flood layers for 18 years were integrated into flood hazard layer representing the observed flood-inundated areas with different frequencies.
- The atlas would serve as a useful resource of information for policy makers, planners and civil society groups in managing floods in the state.
- The atlas will help the authorities:
- to systematically plan flood control measures
- to carry out relief and rescue operations
- to control developmental activities on flood plains
- to plan relief shelters and health centers
About National Remote Sensing Centre (NRSC)
- National Remote Sensing Centre (NRSC) in Hyderabad is responsible for remote sensing satellite data acquisition and processing, data dissemination, aerial remote sensing and decision support for disaster management.
- NRSC has a data reception station for acquiring data from Indian remote sensing satellites as well as others.
- NRSC Ground station acquires Earth Observation data from Indian remote-sensing satellites as well as from different foreign satellites.
- NRSC is also engaged in executing remote sensing application projects in collaboration with the users.
- It is one of the centers of the Indian Space Research Organisation (ISRO).