| add_waterYear()
 | Add Water Year Column | 
        
        | aggregate_dowy()
 | Aggregate by DOWY | 
        
        | aggregate_j()aggregate_j()
 | Aggregate by Julien Day | 
        
        | aggregate_m()
 | Aggregate by Month | 
        
        | aggregate_record()
 | Aggregate by Record | 
        
        | aggregate_s()
 | Aggregate by Season | 
        
        | aggregate_wy()
 | Aggregate by Water Year | 
        
        | aggregate_wym()
 | Aggregate by Water Year - Month | 
        
        | aggregate_wymd()
 | Aggregate by Water Year - Month - Day | 
        
        | aggregate_wys()
 | Aggregate by Water Year - Season | 
        
        | aggregate_y()
 | Aggregate by Year | 
        
        | aggregate_yj()
 | Aggregate by Year-Julien Day | 
        
        | aggregate_ym()
 | Aggregate by Year-Month | 
        
        | aggregate_ymd()
 | Aggregate by Year-Month-Day | 
        
        | aggregate_ys()
 | Aggregate by Year-Season | 
        
        | discover_nhd()
 | Discover NHD Features | 
        
        | discover_nwis()
 | Discover USGS NWIS Stream Gages | 
        
        | find_outlets()
 | Identify NHD outlets from flowlines | 
        
        | gage_lu
 | COMID to NWIS ID lookup
Dataset containing COMID-NWIS lookup | 
        
        | readNWMdata()
 | NWM Reanalysis Extraction | 
        
        | split_time()
 | Split Y-M-D-H into time components |