Impacts of climate variability and human activities on decrease in streamflow in the Qinhe River, China
文献类型：SCI/SSCI论文
| 作者 | Bai P. ; Liu W. H. ; Guo M. J. |
| 发表日期 | 2014 |
| 关键词 | yellow-river mann-kendall trend test last half runoff basin water vegetation precipitation sensitivity |
| 英文摘要 | Under the impacts of climate variability and human activities, there are statistically significant decreasing trends for streamflow in the Yellow River basin, China. Therefore, it is crucial to separate the impacts of climate variability and human activities on streamflow decrease for better water resources planning and management. In this study, the Qinhe River basin (QRB), a typical sub-basin in the middle reach of the Yellow River, was chosen as the study area to assess the impacts of climate variability and human activities on streamflow decrease. The trend and breakpoint of observed annual streamflow from 1956 to 2010 were identified by the nonparametric Mann-Kendall test. The results showed that the observed annual streamflow decreased significantly (P < 0.05) and a breakpoint around 1973 was detected. Therefore, the time series was divided into two periods: "natural period" (before the breakpoint) and "impacted period" (after the breakpoint). The observed annual streamflow decreased by 68.1 mm from 102.3 to 34.2 mm in the two periods. The climate elasticity method and hydrological model were employed to separate the impacts of climate variability and human activities on streamflow decrease. The results indicated that climate variability was responsible for 54.1 % of the streamflow decrease estimated by the climate elasticity method and 59.3 % estimated by the hydrological modeling method. Therefore, the climate variability was the main driving factor for streamflow decrease in the QRB. Among these driving factors of natural and anthropogenic, decrease in precipitation and increase in water diversion were the two major contributions of streamflow reduction. The finding in this study can serve as a reference for regional water resources management and planning. |
| 出处 | Theoretical and Applied Climatology |
| 卷 | 117 |
| 期 | 1-2 |
| 页 | 293-301 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0177-798X |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/29976]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Bai P.,Liu W. H.,Guo M. J.. Impacts of climate variability and human activities on decrease in streamflow in the Qinhe River, China. 2014. |
入库方式： OAI收割
来源：地理科学与资源研究所
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