年代/指标 | 金沙江 | 岷沱江 | 嘉陵江 | 长上干区 | 乌江 | 长江上游 | |
面积(万km2) | 47.4 | 16.3 | 15.9 | 10.0 | 8.8 | 98.4 | |
面积占比 | 48.2% | 16.6% | 16.2% | 10.2% | 8.9% | 100.0% | |
1961~1990 | 年均径流量(亿m³) | 1440 | 997 | 709 | 748 | 496 | 4391 |
分区占比 | 32.8% | 22.7% | 16.1% | 17.0% | 11.3% | 100.0% | |
1991~2015 | 偏枯程度 | 1.8% | −7.1% | −14.9% | −10.5% | −3.4% | −5.6% |
贡献度 | −10.3% | 28.8% | 42.8% | 31.8% | 6.8% | 100.0% | |
2003~2015 | 偏枯程度 | −4.7% | −7.1% | −4.9% | −20.5% | −15.2% | −9.1% |
贡献度 | 16.7% | 17.6% | 8.7% | 38.2% | 18.7% | 100.0% |