Table 2 Global and continental curve number (CN) values derived from GCN250.

From: GCN250, new global gridded curve numbers for hydrologic modeling and design

Continent CN (dry) CN (average) CN (wet)
min max µ σ min max µ σ min max µ σ
Global 16 85 61.4 8.4 31 94 78.3 6.3 51 98 89.9 3.7
Africa 18 85 61.8 8.2 35 94 78.7 6.1 59 98 90.1 3.6
Asia 30 85 63.4 9.2 49 94 79.8 6.5 73 98 90.8 3.6
Australia 16 85 67.4 8.5 31 94 82.8 6.0 51 98 92.4 3.2
Europe 18 85 55.5 9.1 35 94 73.6 7.6 59 98 87.0 5.0
North America 18 85 60.7 9.4 35 94 77.8 7.2 59 98 89.6 4.4
South America 36 85 60.0 6.8 56 94 77.5 5.1 75 98 89.4 3.0
Oceania 36 85 60.8 7.3 56 94 78.0 5.6 75 98 89.8 3.3
  1. Data is for three antecedent runoff conditions: average, dry, and wet. min is the minimum CN, max is the maximum CN, µ is the CN spatial mean, and σ is the CN spatial standard deviation.