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Table 1 Correlations of river runoff and major ion concentrations of the Yellow River at the Lanzhou and Huayuankou Station

From: Trends of water quantity and water quality of the Yellow River from 1956 to 2009: implications for the effect of climate change

Parameters Runoff of Lanzhou station Runoff of Huayuankou station
  August September October August September October
Ca2+ (Aug.) -0.338*    -0.302   
Ca2+ (Sep.)   -0.133    -0.237  
Ca2+ (Oct.)    -0.007    -0.668**
Mg2+(Aug.) -0.250    -0.324   
Mg2+ (Sep.)   -5.44**    -0.447*  
Mg2+ (Oct.)    -1.25    -0.597**
Total ions (Aug.) -0.419*    -0.364   
Total ions (Sep.)   -4.12*    -0.461*  
Total ions (Oct.)    -0.074    -0.672**
  1. *Correlation is significant at the 0.05 level.
  2. **Correlation is significant at the 0.01 level.