Multi-temporal scale changes of streamflow and sediment load in a loess hilly watershed of China
文献类型：期刊论文
| 作者 | Gao, Guangyao; Ma, Ying; Fu, Bojie |
| 刊名 | HYDROLOGICAL PROCESSES
 |
| 出版日期 | 2016-01-30 |
| 卷号 | 30期号:3页码:365-382 |
| 关键词 | streamflow sediment load multi-temporal scale change analysis the Loess Plateau |
| 英文摘要 | Global climate change and diverse human activities have resulted in distinct temporal-spatial variability of watershed hydrological regimes, especially in water-limited areas. This study presented a comprehensive investigation of streamflow and sediment load changes on multi-temporal scales (annual, flood season, monthly and daily scales) during 1952-2011 in the Yanhe watershed, Loess Plateau. The results indicated that the decreasing trend of precipitation and increasing trend of potential evapotranspiration and aridity index were not significant. Significant decreasing trends (p< 0.01) were detected for both the annual and flood season streamflow, sediment load, sediment concentration and sediment coefficient. The runoff coefficient exhibited a significantly negative trend (p< 0.01) on the flood season scale, whereas the decreasing trend on the annual scale was not significant. The streamflow and sediment load during July-August contributed 46.7% and 86.2% to the annual total, respectively. The maximum daily streamflow and sediment load had the median occurrence date of July 31, and they accounted for 9.7% and 29.2% of the annual total, respectively. All of these monthly and daily hydrological characteristics exhibited remarkable decreasing trends (p< 0.01). However, the contribution of the maximum daily streamflow to the annual total progressively decreased (-0.07% year(-1)), while that of maximum daily sediment load increased over the last 60 years (0.08% year(-1)). The transfer of sloping cropland for afforestation and construction of check-dams represented the dominant causes of streamflow and sediment load reductions, which also made the sediment grain finer. Copyright (C) 2015 John Wiley & Sons, Ltd. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/35631]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Gao, Guangyao,Ma, Ying,Fu, Bojie. Multi-temporal scale changes of streamflow and sediment load in a loess hilly watershed of China[J]. HYDROLOGICAL PROCESSES,2016,30(3):365-382. |
| APA | Gao, Guangyao,Ma, Ying,&Fu, Bojie.(2016).Multi-temporal scale changes of streamflow and sediment load in a loess hilly watershed of China.HYDROLOGICAL PROCESSES,30(3),365-382. |
| MLA | Gao, Guangyao,et al."Multi-temporal scale changes of streamflow and sediment load in a loess hilly watershed of China".HYDROLOGICAL PROCESSES 30.3(2016):365-382. |
入库方式： OAI收割
来源：生态环境研究中心
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