# name (hydrology.res)

The name of the reservoir hydrology record is a primary key referenced by the foreign key [hyd](https://swatplus.gitbook.io/io-docs/introduction-1/reservoirs/reservoir.res/hyd) in [**reservoir.res**](https://swatplus.gitbook.io/io-docs/introduction-1/reservoirs/reservoir.res). All names in the **hydrology.res** file must be unique.