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Table 2 Correlations among socioeconomic indices of each region in 2017 and the numbers of filter freshwater ecological restoration publications

From: General trends in freshwater ecological restoration practice in China over the past two decades: the driving factors and the evaluation of restoration outcome

Correlation coefficient

GDP

Water resource

Wastewater discharge

Water pollution control investment

FER publication number

Population (× 106)

0.972***

0.405

0.996***

0.819*

0.902*

GDP (× 109 RMB)

 

0.197

0.979***

0.923**

0.968***

Water resource (× 109 m3)

  

0.360

− 0.068

0.098

Wastewater discharge (× 106 m3)

   

0.845*

0.924**

Water pollution control investment (× 109 RMB)

    

0.977***

  1. *indicates P < 0.05, **indicates P < 0.01, ***indicates P < 0.001