Pragnya IAS · Map 50 · Climate & environment
India: flood hazard zones map study
Map flood exposure along the great river plains and learn why Bihar and Assam top the list.
STUDY NOTE 1
The flood belt
The Ganga and Brahmaputra plains — especially Bihar, UP’s east, Bengal and Assam — plus the Punjab rivers and the deltaic east coast form the core flood zone.
STUDY NOTE 2
Causes stack up
Heavy monsoon rain, snowmelt, flat gradients, silted channels, embankment breaches and encroached floodplains combine; Assam floods nearly every year.
STUDY NOTE 3
Flash floods are different
Himalayan cloudbursts, glacial lake outbursts and urban flooding (Chennai 2015, Mumbai 2005) are rapid-onset events the riverine map alone does not capture.
Map reading task
Mark the five most flood-prone states and classify each flood type: riverine, flash, urban or coastal.
Map key · Reference locations
What does this india: flood hazard zones lesson explain?
The Ganga and Brahmaputra plains — especially Bihar, UP’s east, Bengal and Assam — plus the Punjab rivers and the deltaic east coast form the core flood zone.
UPSC map practice & Geography Optional connection
For UPSC Prelims, pair the location with its state, neighbouring relief and relevant geographic process. For GS I and Geography Optional Indian geography revision, use a simple labelled sketch to explain the relationship rather than replacing the answer with place names. These are Pragnya-authored exercises, not official UPSC previous-year questions.
References & map credits
Pragnya IAS explanations and practice are independently authored. The uploaded geography compilation informed topic selection only; its pages, illustrations, advertisements and personal watermarks are not republished. Licensed base data retain their original attribution. These lessons are educational references, not navigation, legal boundary or live hazard maps.