['A', 'DG', '-', 'based', 'shallow', 'water', 'model', 'appeals', 'in', 'providing', 'higher', 'quality', 'solutions', 'on', 'very', 'coarse', 'meshes', 'than', 'a', 'traditional', 'finite', 'volume', 'counterpart', ',', 'but', 'is', 'comparatively', 'expensive', 'to', 'run', 'and', 'imposes', 'a', 'more', 'restrictive', 'stability', 'condition', 'for', 'the', 'CFL', 'number', '\xa0 ', '[', '28,29', ']', '.']