This is a major release where we move from the 1_5 flow algorithm used in anuga version 1.3 to the DE0 algorithm.
The new algorithm permits discontinuous bed, which in turn allows for riverwalls and fences to be used, where flow over these structures are controlled by the weir equations.
If you need to use the old algorithm, add the command:
domain.set_flow_algorithm('1_5')
If you need more accuracy, you can use the second order in time flow algorithm DE1, set via:
domain.set_flow_algorithm('DE1')