The Nagaon district in Assam is in a sub-humid region with a greater part of the district comprising alluvial soil ranging from pure sand on the banks of the Brahmaputra to stiff clay. The area is subjected to frequent flooding by rivers during a spell of 4 months in a year. In the present study, flood hazard layer is considered as the primary input and is integrated with land use/land cover, infrastructure and population data and weightages are assigned to each class. Based on this, village flood risk index map for Nagaon district has been generated.

Hydrological modelling of large river catchments is a challenging task for water resources engineers due to its complexity in collecting and handling of both spatial and non-spatial data such as rainfall, gauge discharges, and topographic parameters.