Guidance on Setup, Calibration, and Validation of Hydrodynamic, Wave, and Sediment Models for Shelf Seas and Estuaries

Table 3

Recommended model grid resolution for flood studies in estuaries (A = design; B = appraisal; C = strategy; and U = unsatisfactory); from Defra/EA [3].

Type	Resolution for water level (m)	Resolution for flow velocity (m)	Grid point needed to resolve key features^†
A	≤5	≤2	>8
B	5 to 10	2 to 4	5 to 7
C	10 to 25	4 to 6	3 to 4
U	>25	>6	<3

^†Channels, sand banks, etc.