Flood plain mapping in a part of Yamuna basin – A research report by National Institute of Hydrology

The study deals with flood plain mapping in a part of Yamuna basin between Gangoh and New Delhi. A flood is a markedly high stage of flow in a river and may inundate adjoining lands, which is called the floodplain of a river. So, floodplain is land inundated by a flood of given frequency. Alternately it is also defined as flat land between valley walls.

A floodplain river creates landscape between valley walls. Floodplains comprise of alluvial deposits, natural levees, oxbow lakes, channel fillings, clay plugs, sand plugs, sand bars, back swamps, back swamp deposits, channel scour routes, alluvial cones and deltaic deposits.

The data used comprises of satellite FCC paper prints and SoI topographic maps. As a part of the study river channels and tributaries have been mapped. The satellite data are geo-referenced digitally and maps have been digitized, following which the output was generated using the Integrated Land and Water Information Systems (ILWIS) Windows version. River migrations have been depicted graphically and bend statistics computed from satellite data to find median values.

Download the report here: