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Hydro Climatic Trend and Periodicity for the Source Region of the Yellow River

Yuan, Feifei LU ; Berndtsson, Ronny LU ; Zhang, Linus LU ; Bertacchi Uvo, Cintia LU ; Hao, Zhenchun; Wang, Xinping and Yasuda, Hiroshi (2015) In Journal of Hydrologic Engineering 20(10).
Abstract
The hydrology of the Yellow River source region is expected to be affected by coming climate change. This will have repercussions for the 110million basin inhabitants. Consequently, precipitation, temperature, and streamflow trends and periodicities during the last 50years were investigated to identify significant changes in time and space over the study area. Results showed that mean annual temperature increased for all stations and it had an accelerated increasing trend during the last decade. Mean annual precipitation trends varied depending on the station; however, they were generally slightly decreasing. Annual streamflow decreased markedly, especially from the 1990s, but showed recovery during recent years. Statistically significant... (More)
The hydrology of the Yellow River source region is expected to be affected by coming climate change. This will have repercussions for the 110million basin inhabitants. Consequently, precipitation, temperature, and streamflow trends and periodicities during the last 50years were investigated to identify significant changes in time and space over the study area. Results showed that mean annual temperature increased for all stations and it had an accelerated increasing trend during the last decade. Mean annual precipitation trends varied depending on the station; however, they were generally slightly decreasing. Annual streamflow decreased markedly, especially from the 1990s, but showed recovery during recent years. Statistically significant changes in trend occurred for temperature in 1998 and for streamflow in 1990. Based on the streamflow change point, seasonal analysis results showed that precipitation mainly decreased during the summer monsoon period (July-September) and temperature increased throughout the year. Corresponding to the weakened monsoon period the average runoff depth is decreasing by 0.74mm/year over the whole area. Statistically significant 2- to 4-year periodicities for mean areal precipitation and temperature occurred over the area. For streamflow, an even stronger 8-year periodicity was revealed from the end of the 1960s to the beginning of the 1990s. Frequency analysis investigated the magnitudes of mean annual precipitation and discharge corresponding to a given frequency. Hydroclimatic trends and linkages at each subbasin were investigated to further improve the understanding of observed streamflow changes. The investigated results have important implications for future water availability in the Yellow River source region. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Climate change, Streamflow decrease, Yellow River source region
in
Journal of Hydrologic Engineering
volume
20
issue
10
publisher
American Society of Civil Engineers (ASCE)
external identifiers
  • wos:000361481300018
  • scopus:84941661701
ISSN
1084-0699
DOI
10.1061/(ASCE)HE.1943-5584.0001182
language
English
LU publication?
yes
id
9281cd4d-db1f-41b7-906e-ea6ebd1a4721 (old id 8071144)
date added to LUP
2015-10-22 09:47:14
date last changed
2017-03-12 03:45:13
@article{9281cd4d-db1f-41b7-906e-ea6ebd1a4721,
  abstract     = {The hydrology of the Yellow River source region is expected to be affected by coming climate change. This will have repercussions for the 110million basin inhabitants. Consequently, precipitation, temperature, and streamflow trends and periodicities during the last 50years were investigated to identify significant changes in time and space over the study area. Results showed that mean annual temperature increased for all stations and it had an accelerated increasing trend during the last decade. Mean annual precipitation trends varied depending on the station; however, they were generally slightly decreasing. Annual streamflow decreased markedly, especially from the 1990s, but showed recovery during recent years. Statistically significant changes in trend occurred for temperature in 1998 and for streamflow in 1990. Based on the streamflow change point, seasonal analysis results showed that precipitation mainly decreased during the summer monsoon period (July-September) and temperature increased throughout the year. Corresponding to the weakened monsoon period the average runoff depth is decreasing by 0.74mm/year over the whole area. Statistically significant 2- to 4-year periodicities for mean areal precipitation and temperature occurred over the area. For streamflow, an even stronger 8-year periodicity was revealed from the end of the 1960s to the beginning of the 1990s. Frequency analysis investigated the magnitudes of mean annual precipitation and discharge corresponding to a given frequency. Hydroclimatic trends and linkages at each subbasin were investigated to further improve the understanding of observed streamflow changes. The investigated results have important implications for future water availability in the Yellow River source region.},
  author       = {Yuan, Feifei and Berndtsson, Ronny and Zhang, Linus and Bertacchi Uvo, Cintia and Hao, Zhenchun and Wang, Xinping and Yasuda, Hiroshi},
  issn         = {1084-0699},
  keyword      = {Climate change,Streamflow decrease,Yellow River source region},
  language     = {eng},
  number       = {10},
  publisher    = {American Society of Civil Engineers (ASCE)},
  series       = {Journal of Hydrologic Engineering},
  title        = {Hydro Climatic Trend and Periodicity for the Source Region of the Yellow River},
  url          = {http://dx.doi.org/10.1061/(ASCE)HE.1943-5584.0001182},
  volume       = {20},
  year         = {2015},
}