Effects of Permafrost Degradation on the Hydrological Regime in the Source Regions of the Yangtze and Yellow Rivers, China
文献类型：期刊论文
| 作者 | Wang, Xiqiang1,2; Chen, Rensheng1; Yang, Yong1 |
| 刊名 | WATER
 |
| 出版日期 | 2017-11-01 |
| 卷号 | 9期号:11页码:13 |
| 关键词 | permafrost degradation source regions of the Yangtze and Yellow rivers summer precipitation correlation analysis hydrological regime |
| ISSN号 | 2073-4441 |
| DOI | 10.3390/w9110897 |
| 通讯作者 | Chen, Rensheng(crs2008@lzb.ac.cn) |
| 英文摘要 | Climate warming has intensified permafrost degradation, which could have a variety of implications on the hydrological regime in permafrost regions. In this study, we analyzed the effects of permafrost degradation on the hydrological regime via four hydrological variables for 10 unregulated catchments in the source regions of the Yangtze and Yellow rivers. The results demonstrate that catchments with high permafrost coverage are expected to have an increased winter discharge ratio (proportion of winter discharge contribution to total annual flow), a decreased recession coefficient and a decreased ratio of Q(max)/Q(min) due to permafrost degradation. However, the great storage effects of lakes and wetlands, which could contribute to more groundwater instead of direct surface discharge, may affect the hydrological effects of permafrost degradation and result in the abnormal performance at catchment scale. The correlation analysis between summer precipitation (July-September) and the following winter discharge (December-February) indicates that permafrost degradation may affect the redistribution of summer precipitation towards the following winter discharge via increasing the soil storage capacity and delaying the release of water into streams in permafrost regions. However, unlike the Arctic and sub-Arctic regions, no significant changes for the hydrological regime (four hydrological variables) are detected over the individual periods of records for each catchment. Decreased precipitation in summer seems to reduce the water infiltration to supply the groundwater, which weakens the effects of permafrost degradation on the hydrological regime. This study implies that the storage effects of lakes and wetlands and the changes of summer precipitation patterns should be considered in future permafrost hydrological simulations, which have suggested that a large increase in groundwater discharge to streams will likely occur in response to permafrost degradation due to the warming climate in the ideal scenario. |
| 收录类别 | SCI |
| WOS关键词 | GROUNDWATER-FLOW ; CLIMATIC-CHANGE ; COLD ; PRECIPITATION ; SIMULATION ; GENERATION ; CATCHMENTS ; IMPACTS ; SIBERIA ; BASINS |
| WOS研究方向 | Water Resources |
| WOS类目 | Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000416798300083 |
| 出版者 | MDPI AG |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558032 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Chen, Rensheng |
| 作者单位 | 1.Chinese Acad Sci, Qilian Alpine Ecol & Hydrol Res Stn, Northwest Inst Ecoenvironm & Resources, Key Lab Inland River Ecohydrol, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Xiqiang,Chen, Rensheng,Yang, Yong. Effects of Permafrost Degradation on the Hydrological Regime in the Source Regions of the Yangtze and Yellow Rivers, China[J]. WATER,2017,9(11):13. |
| APA | Wang, Xiqiang,Chen, Rensheng,&Yang, Yong.(2017).Effects of Permafrost Degradation on the Hydrological Regime in the Source Regions of the Yangtze and Yellow Rivers, China.WATER,9(11),13. |
| MLA | Wang, Xiqiang,et al."Effects of Permafrost Degradation on the Hydrological Regime in the Source Regions of the Yangtze and Yellow Rivers, China".WATER 9.11(2017):13. |
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来源：寒区旱区环境与工程研究所
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