Table 3.

Difference in D_cf before and after the TGR.

Hydrographic station	MK method	GR method	BK method	Effective discharge12	This study
Yichang	− 3000	− 9100	− 4200	–	− 4200
Zhicheng	− 6000	− 13,100	− 6200		− 4700
Shashi	− 3000	− 8800	− 3800		− 3300
Jianli	− 3000	− 6600	− 3000	− 400	− 2500
Luoshan	− 3000	− 8400	− 5000	–	− 3300
Hankou	− 3000	− 8200	− 4400		− 2800
Jiujiang	− 3000	− 9100	− 4900		− 3300
Datong	− 3000	− 7000	− 4800		− 2800