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Distinguishing the Relative Contribution of Environmental Factors to Runoff Change in the Headwaters of the Yangtze River
Guo, Mengjing1; Li, Jing1; Wang, Yongsheng2; Bai, Peng3; Wang, Jiawei1
2019-07-01
Source PublicationWATER
ISSN2073-4441
Volume11Issue:7Pages:17
Corresponding AuthorLi, Jing(guomengjing@xaut.edu.cn)
AbstractThe change in river flows at the basin scale reflects the combined influences of changes in various environmental factors associated with climatic and underlying surface properties. Distinguishing the relative contribution of each of these factors to runoff change is critical for sustainable water resource management, but it is also challenging. The headstream region of the Yangtze River, known as China's Water Tower, has undergone a significant runoff change over the past decades. However, the relative contribution of environmental factors to runoff change is still unclear. Here, we designed a series of detrending experiments based on a grid-based hydrological model to quantify the combined influences of multiple environmental factors on runoff change and the relative contribution of an individual factor to runoff change. The results indicate that changes in climate and vegetation significantly increased water yield in the study basin over the past three decades, and the increase in water yield primarily came from the contribution from the upstream of the basin. On the basin scale, the change in precipitation dominated the runoff change that contributed up to 113.2% of the runoff change, followed by the wind speed change with a contribution rate of -15.1%. Other factors, including changes in temperature, relative humidity, sunshine duration (as a surrogate for net radiation), and albedo (as a surrogate for vegetation) had limited effects on runoff change, and the contribution rate of these factors to runoff change ranged from -5% to 5%. On spatial patterns, the influences of changes in some environmental factors on runoff changes were affected by elevation, particularly for temperature. The rising temperature had mixed effects on runoff change, which generally increased water yield at high altitudes of the basin but decreased water yield at low altitudes of the basin.
Keywordclimate change river runoff hydrological modeling Yangtze River
DOI10.3390/w11071432
WOS KeywordCLIMATE-CHANGE ; TIBETAN PLATEAU ; WATER-RESOURCES ; LAND-USE ; IMPACT ; CHINA ; EVAPOTRANSPIRATION ; BASIN ; PERFORMANCE ; CATCHMENTS
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Program of China[2016YFC0401402] ; Natural Science Foundation of China[41601034] ; Natural Science Foundation of China[41807156]
Funding OrganizationNational Key Research and Development Program of China ; Natural Science Foundation of China
WOS Research AreaWater Resources
WOS SubjectWater Resources
WOS IDWOS:000480632300117
PublisherMDPI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/68798
Collection中国科学院地理科学与资源研究所
Corresponding AuthorLi, Jing
Affiliation1.Xian Univ Technol, State Key Lab Ecohydraul Northwest Arid Reg, Xian 710048, Shaanxi, Peoples R China
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Reg Sustainable Dev Modeling, Beijing 100101, Peoples R China
3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Guo, Mengjing,Li, Jing,Wang, Yongsheng,et al. Distinguishing the Relative Contribution of Environmental Factors to Runoff Change in the Headwaters of the Yangtze River[J]. WATER,2019,11(7):17.
APA Guo, Mengjing,Li, Jing,Wang, Yongsheng,Bai, Peng,&Wang, Jiawei.(2019).Distinguishing the Relative Contribution of Environmental Factors to Runoff Change in the Headwaters of the Yangtze River.WATER,11(7),17.
MLA Guo, Mengjing,et al."Distinguishing the Relative Contribution of Environmental Factors to Runoff Change in the Headwaters of the Yangtze River".WATER 11.7(2019):17.
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