This function filters, transforms, and processes well water level data from a combined dataset. It prepares the data for mapping and analysis by calculating changes in well water levels, joining with basin information, and summarizing the data on a monthly basis.
Arguments
- x
A data frame containing well water level data. Defaults to `all_combined_data`.
- y
A spatial data frame containing basin information. Defaults to `ActiveDivides`.
Value
A data frame with monthly averages of the change in well water levels for each basin. The output includes:
- Divide
The divide ID.
- date
The first day of the month for which the average is calculated.
- mean_change_mm
The mean change in well water level in millimeters.