Table 5 K-S test results of the temporal distribution function of the spring drought index CCDI in Zhengzhou.

From: Analysis of the spatial and temporal evolution of drought in Henan based on a nonlinear composite drought index

K-Stest(p-value)

Lognormal

Normal

Gamma

Weibull

Exponential

P

0.862

0.6358

0.9758

0.8314

0.5142

PET

0.4436

0.4425

0.5641

0.7644

0.4748

SM

0.8858

0.7866

0.8940

0.7753

0.7668

NDVI

0.7364

0.8983

0.8026

0.8155

0.5412

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