Update CHANGELOG.md

docs/CHANGELOG.md

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 All notable changes to this project will be documented in this file.
 We follow the [Semantic Versioning 2.0.0](http://semver.org/) format.
 
+## vx.x.x.x - 2024-11-08 - [PR#1340](https://github.com/NOAA-OWP/inundation-mapping/pull/1340)
+
+This branch focuses on adjusting rating curves by using bathymetric data and optimized channel roughness values. The bathymetry data includes eHydro surveys and AI-based datasets created for all NWM streams. New manning roughness values were developed for each feature-id using a differential evolution objective function (OF). The OF minimizes the number of the false_positives and false_negatives cells in our flood inundation maps where we have test cases across the CONUS. 
+
+### Changes
+- `src/bathymetric-adjustment.py`: `correct_rating_for_ai_based_bathymetry` function was added to the script. This function processes AI-based bathymetry data and adjusts rating curves using this data. Also `apply_src_adjustment_for_bathymetry` function was added to prioritize USACE eHydro over AI-based bathymetry dataset. The multi-processing function `multi_process_hucs` was updated based on the latest code.
+
+- `src/bash_variables.env`: New variables and their paths were added. Also, a new input file with the nwm feature_ids and optimized channel roughness and overbank roughness attributes was created and stored here:
+`/fim-data/inputs/rating_curve/variable_roughness/mannings_optz_fe_clusters_so3.csv`
+The location of this file was also added to the `bash_variables.env`.
+
+- `fim_post_processing.sh`: New arguments were added.
+
+### Testing
+This PR has been tested over multiple HUC8s around the Illinois River, Kanawha River, and Ohio River.
+
+<br/><br/>
+
+
 ## v4.5.12.0 - 2024-11-01 - [PR#1327](https://github.com/NOAA-OWP/inundation-mapping/pull/1327)
 
 The purpose of this PR is to cut down the runtime for four Alaska HUCs (19020104, 19020503, 19020402 , and 19020602). It significantly optimizes runtime by replacing a nested for loop, used for updating rating curve for small segments, with a vectorized process. This changes were applied only to the Alaska HUCs.