Research Article
Variation of Runoff and Precipitation in the Hekou-Longmen Region of the Yellow River Based on Elasticity Analysis
Table 4
Influence of precipitation on runoff decline in the Hekou-Longmen region, Huangfuchuan, and Yanhe.
| | Study area | Periods | Precipitation (mm) | Runoff (108 m3) | Changes in precipitation (%) | Changes in runoff (%) | Effect of precipitation on runoff decline | | Amount (108 m3) | Percentage % |
| | Hekou-Longmen region | Before 1979 | 477.8 | 64.4 | — | — | | | | 1980–1998 | 430.0 | 40.3 | 10.0 | 37.4 | 7.15 | 26.4% | | 1999–2010 | 413.5 | 23.4 | 13.5 | 63.7 | 9.61 | 23.5% | | 1980–2010 | 423.6 | 33.7 | 11.3 | 47.7 | 8.10 | 29.7% |
| | Huangfuchuan | Before 1979 | 384.2 | 1.95 | — | — | | | | 1980–1998 | 348.9 | 1.14 | 9.2 | 41.5 | 0.195 | 24.1% | | 1999–2010 | 345.6 | 0.32 | 10.0 | 83.6 | 0.213 | 13.1% | | 1980–2010 | 347.6 | 0.82 | 9.5 | 57.9 | 0.202 | 17.9% |
| | Yanhe | Before 1996 | 514.3 | 2.21 | — | — | | | | 1997–2010 | 471.7 | 1.48 | 8.3 | 33.0 | 0.231 | 31.6% |
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