Table 3 Optimal marginal distribution functions for drought characteristic variables.

From: Temporal and spatial response of agricultural drought to meteorological drought in inner Mongolia plateau inland river basin

Drought type

Drought variable

RMSE

Optimal distribution

normal

LogN

Gam

GEV

Rl

Wb

Exp

Meteorological drought

Duration

0.089

0.062

0.062

0.081

0.178

0.059

0.053

Exp

Severity

0.102

0.061

0.046

0.081

0.134

0.048

0.087

Gam

Area

0.058

0.096

0.081

0.067

0.099

0.077

0.085

normal

Agricultural drought

Duration

0.115

0.122

0.116

0.228

0.232

0.114

0.134

Wb

Severity

0.123

0.082

0.078

0.093

0.277

0.085

0.191

Gam

Area

0.125

0.061

0.074

0.062

0.275

0.066

0.116

LogN