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

Environmental Systems Research

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

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**