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Table 2

Model parameters from grid-sensitivity analysis for Watershed B with a 100-year return period

Cell size (m*m)Number of cellsEquation setTime step (s)Run time (hh:mm:ss)Maximum velocity (m/s)Courant number
0.2*0.2 732,953 Full momentum 0.1 58:25:23 13.5 6.75 
0.5*0.5 117,038 Full momentum 0.1 05:23:14 6.7 1.34 
1.0*1.0 29,810 Full momentum 0.1 01:25:28 6.5 0.65 
1.5*1.5 13,574 Full momentum 0.1 00:49:53 6.5 0.43 
2.0*2.0 7,657 Full momentum 0.1 00:29:09 6.4 0.32 
0.2*0.2 732,953 Diffusive wave 0.1 25:06:34 10.5 5.25 
0.5*0.5 117,038 Diffusive wave 0.1 03:02:58 10.1 2.02 
1.0*1.0 29,810 Diffusive wave 0.1 00:40:36 7.48 0.75 
1.5*1.5 13,574 Diffusive wave 0.1 00:20:20 7.81 0.52 
2.0*2.0 7,657 Diffusive wave 0.1 00:06:55 7.87 0.39 
Cell size (m*m)Number of cellsEquation setTime step (s)Run time (hh:mm:ss)Maximum velocity (m/s)Courant number
0.2*0.2 732,953 Full momentum 0.1 58:25:23 13.5 6.75 
0.5*0.5 117,038 Full momentum 0.1 05:23:14 6.7 1.34 
1.0*1.0 29,810 Full momentum 0.1 01:25:28 6.5 0.65 
1.5*1.5 13,574 Full momentum 0.1 00:49:53 6.5 0.43 
2.0*2.0 7,657 Full momentum 0.1 00:29:09 6.4 0.32 
0.2*0.2 732,953 Diffusive wave 0.1 25:06:34 10.5 5.25 
0.5*0.5 117,038 Diffusive wave 0.1 03:02:58 10.1 2.02 
1.0*1.0 29,810 Diffusive wave 0.1 00:40:36 7.48 0.75 
1.5*1.5 13,574 Diffusive wave 0.1 00:20:20 7.81 0.52 
2.0*2.0 7,657 Diffusive wave 0.1 00:06:55 7.87 0.39 
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