Abstract
The geospatial technique is used in monitoring the flood event of north Bihar (NB) during the monsoon season, 2020. The research work was performed to estimate the impact of a flood using multi-temporal Sentinel-1A (SAR) and moderate resolution imaging spectroradiometer near real-time (MODIS NRT) flood data over North Bihar. Binarization technique was used for extraction of flood water pixel, and the threshold was applied over the satellite image. It reported that most of the districts of north Bihar received continuous heavy rainfall (340–400 mm/day). Results revealed that there was an intense and heavy rainfall during the monsoon season, 2020. These results are important for policymakers to assess flood impacts. It can be inferred that the flood forecast using SAR data will lead to spatial accuracy and hydrological models.
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