Post Disaster Needs Assessment
Also called: PDNA · Topic: Natural Hazards and Disaster Management in India · NCERT: Beyond NCERT
Meaning
A Post Disaster Needs Assessment (PDNA) is an official study done after a disaster. It records three things. The first is damage, meaning the homes, roads and other things that were destroyed. The second is losses, meaning lost income, lost services and higher costs while life is disrupted. The third is recovery needs, meaning the money and work required to rebuild. Governments use it to plan reconstruction and to decide where it is unsafe to rebuild. A PDNA sits in the post-disaster stage of the disaster management cycle. It supports the "Build Back Better" idea of the Sendai Framework, which means rebuilding stronger and safer than before, not just copying what was lost.
Example
In January 2023, homes in Joshimath (Chamoli district, Uttarakhand) cracked as the ground sank. The town is built on old landslide debris. NDMA's PDNA found that Joshimath had gone beyond its carrying capacity, which is the most people and buildings the land and services can hold. It recommended declaring the area a no-new-construction zone.
Don't confuse with
- Carrying capacity study: this measures a place's limits, ideally before building is approved. A PDNA is done only after the damage has happened.
- Disaster mitigation: these are steps taken before a disaster to reduce harm, such as building codes and hazard maps. A PDNA assesses the damage afterwards.