Elmt_ID Chan_ID Contributing_Area (ha) Channel_Type
   46    1            17.73                perennial 
   47    2            11.29                perennial 
   48    3            13.90                perennial 
   49    4             9.57                perennial 
   50    5            23.46                perennial 
   51    6             7.39                perennial 
   52    7             6.51                perennial 
   53    8            17.71                perennial 
   54    9             8.51                perennial 
   55   10            26.24                perennial 
   56   11            58.48                perennial 
   57   12            24.17                perennial 
   58   13            19.00                perennial 
   59   14            19.29                perennial 
   60   15            38.84                perennial 
   61   16            73.98                perennial 
   62   17           144.63                perennial 
   63   18            12.55                perennial 
   64   19           157.73                perennial 
   65   20           197.60                perennial 
   66   21           246.11                perennial