Table 1 Statistical data for the water and sediment characteristics from 2003 to 2018.
Annual runoff (100 million m3) | Annual sediment discharge (100 million t) | Annual average sediment concentration (kg/m3) | Annual maximum sediment concentration (kg/m3) | Annual maximum water discharge (m3/s) | Water–sediment combinations | |
|---|---|---|---|---|---|---|
1956–1990 | 3845 | 4.890 | ||||
1991–2002 | 3733 | 3.510 | ||||
2003 | 3138 | 2.322 | 0.740 | 4.528 | 48,590 | Less water and more sediment |
2004 | 3702 | 1.923 | 0.519 | 4.860 | 59,370 | |
2005 | 4177 | 2.777 | 0.665 | 7.071 | 49,300 | More water and more sediment |
2006 | 2678 | 1.190 | 0.444 | 3.557 | 29,600 | |
2007 | 3574 | 2.392 | 0.669 | 5.080 | 44,700 | Medium water and more sediment |
2008 | 3829 | 2.314 | 0.604 | 3.964 | 36,580 | |
2009 | 3463 | 1.829 | 0.528 | 4.750 | 49,470 | |
2010 | 3721 | 2.291 | 0.616 | 5.227 | 64,060 | |
2011 | 3015 | 1.016 | 0.337 | 3.288 | 44,333 | Less water and medium sediment |
2012 | 4165 | 2.186 | 0.525 | 3.784 | 67,800 | |
2013 | 3345 | 1.268 | 0.379 | 15.092 | 46,859 | Medium water and medium sediment |
2014 | 3908 | 0.542 | 0.139 | 1.950 | 50,400 | More water and less sediment |
2015 | 3446 | 0.348 | 0.101 | 1.783 | 32,910 | Less water and less sediment |
2016 | 3805 | 0.417 | 0.109 | 2.859 | 35,310 | |
2017 | 3728 | 0.344 | 0.092 | 1.658 | 31,330 | Medium water and less sediment |
2018 | 4294 | 1.429 | 0.333 | 9.609 | 59,550 | More water and medium sediment |
2003–2018 (average) | 3624 | 1.537 | 0.425 | 4.941 | 46,885 | |
2003–2012 (average) | 3546 | 2.024 | ||||
2013–2018 (average) | 3754 | 0.725 | ||||
Ratio 1 | 0.976 | 0.148 | ||||
Ratio 2 | 1.006 | 0.207 | ||||
Ratio 3 | 1.059 | 0.358 |
