Table 3. Variation in Sediment Loads (Qs) for Four Tributaries Entering the Upper Reaches of the Changjiang, 1954-2004												
Tributary	Station	1954-1968		1969-1985		1986-2002		2003-2004				
		Qs, mt/yr	Ratio, %		Qs, mt/yr	Ratio, %		Qs, mt/yr	Ratio, %		Qs, mt/yr	Ratio, %
Jinshajiang	Pingshan	250	100		210	84		270	108		150	60
Minjiang	Gaochang	60	100		40	67		40	67		40	67
Jialingjiang	Beibei	160	100		140	88		50	31		24	15
Wujiang	Wulong	30	100		40	133		20	67		13	43
Total		500	100		430	86		380	76		230	46