What is the shape of the water?
The water is rectangular.
     src        edge_attr  dst
0      0      in front of   23
1      0  to the right of   21
2      0   to the left of   16
3      0  to the right of   10
4      0  to the right of    5
..   ...              ...  ...
110   27  to the right of   14
111   27   to the left of   21
112   27  to the right of    4
113   27  to the right of    5
114   27   to the left of    0

[115 rows x 3 columns]