Table 1 Classification of coupling coordination degree (CCD).

From: Coordination analysis and evaluation of population, water resources, economy, and ecosystem coupling in the Tuha region of China

CCD value

Categories

CCD value

Categories

0 ≤ CCD ≤ 0.1

Extreme disorder

0.5 < CCD ≤ 0.6

Marginal coordination

0.1 < CCD ≤ 0.2

Serious disorder

0.6 < CCD ≤ 0.7

Low coordination

0.2 < CCD ≤ 0.3

Moderate disorder

0.7 < CCD ≤ 0.8

Moderate coordination

0.3 < CCD ≤ 0.4

Low disorder

0.8 < CCD ≤ 0.9

Good coordination

0.4 < CCD ≤ 0.5

Marginal disorder

0.9 < CCD ≤ 1.0

High coordination