It has been observed in CatFIM and evaluation metrics that "headwater" MS catchments (farthest upstream forecast point) are very large. This can cause issues. Will post screenshots.
Example of "headwater" AHPS points in Texas (yellow points), NWM mainstem flowlines (green), and NWM non-mainstem flowlines (blue dashed). "Missing" flowlines are highlighted in green - ideally we include these flowlines with upstream tracing technique.
Here is an example of the "tapered" flow-based catfim for AHPS site lmct2. There are currently not any flow data being passed to flowlines north of the AHPS forecast point.
It has been observed in CatFIM and evaluation metrics that "headwater" MS catchments (farthest upstream forecast point) are very large. This can cause issues. Will post screenshots.
Example of "headwater" AHPS points in Texas (yellow points), NWM mainstem flowlines (green), and NWM non-mainstem flowlines (blue dashed). "Missing" flowlines are highlighted in green - ideally we include these flowlines with upstream tracing technique.![image](https://user-images.githubusercontent.com/69868854/190271953-3f118fc2-d6d6-45c2-807b-3ed19e50b588.png)
Here is an example of the "tapered" flow-based catfim for AHPS site lmct2. There are currently not any flow data being passed to flowlines north of the AHPS forecast point.![image](https://user-images.githubusercontent.com/69868854/190271459-5ce63d17-5f50-48ed-a73c-6bb7fa567cff.png)