Update README.md

Author: AnuPal1Hydro123

README.md

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 ### **Background**
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-OWP HAND-FIM is a national-scale operational flood forecasting framework (https://github.com/NOAA-OWP/inundation-mapping). It is a terrain-based fluvial flooding model that uses model-predicted streamflow and reach-averaged Synthetic Rating Curves (SRCs) to generate inundation extent and depth rasters at HUC-8 scale (Hydrologic Unit Code-8). The model can produce FIMs for all order streams within the watershed at a very low computational cost. This notebook streamline the FIM generation process or the OWP HAND-FIM framework on the cloud. It allow users to run over mutiple HUC-8s simultaneously. This model can run using any temporal resolution available from the input streamflow data (hourly, daily, monthly etc). **Currently we are hosting the FIM-4.5 and 4.8 version for Inundation Mapping.** Based on user's choice HAND rasters from specific version can be called and used in FIM (Please refer to Step-1)
+OWP HAND-FIM is a national-scale operational flood forecasting framework (https://github.com/NOAA-OWP/inundation-mapping). It is a terrain-based fluvial flooding model that uses model-predicted streamflow and reach-averaged Synthetic Rating Curves (SRCs) to generate inundation extent and depth rasters at HUC-8 scale (Hydrologic Unit Code-8). The model can produce FIMs for all order streams within the watershed at a very low computational cost. This notebook streamline the FIM generation process or the OWP HAND-FIM framework on the cloud. It allow users to run over mutiple HUC-8s simultaneously. This model can run using any temporal resolution available from the input streamflow data (hourly, daily, monthly etc). **Currently we are hosting the latest version of HAND rasters (v 4.9) and also v 4.5 and v 4.8 for Inundation Mapping.** Based on user's choice HAND rasters from specific version can be called and used in FIM (Please refer to Step-1)
 
 ### **Package structures**
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