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Hydro-climatic trends in the last 50 years in the lower reach of the Shiyang River Basin, NW China

Auteur(s) et Affiliation(s)

WANG, H.
Center of Geological Survey, Xi'an, Chine
School of Environment Science and Engineering, Chang'an Univ., Xi'an, Chine
ZHANG, M.
Center of Geological Survey, Xi'an, Chine
ZHU, H.
Center of Geological Survey, Xi'an, Chine
DANG, X.
Center of Geological Survey, Xi'an, Chine
YANG, Z.
UNSCO-IHE Inst. of Water Education, Delft, Pays-Bas
YIN, L.
Center of Geological Survey, Xi'an, Chine


Description :
The hydro-climatic trends were examined for the lower reach of the Shiyang River Basin in NW China using the wavelet analysis and the Mann–Kendall (M–K) test. The results showed that the discharge significantly decreased during the last 5 decades, while there was no noticeable change in precipitation. A 26-year periodicity in discharge was identified by applying the global wavelet spectra and continuous wavelet transform (CWT) method. Because the Shiyang River Basin is located in the cold region of NW China, the contribution of glacier and snow to the discharge is significant. Therefore, the significantly increased temperature during the last 50 years would eventually lead to an increased discharge due to the increased amount of melt water from glacier and snow. However, the increasing water demand for the economic development and oasis expansion in the middle reach of the basin will reduce discharge flowing into the lower reach of the basin.


Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2012, vol. 95, p. 33-41, nombre de pages : 9, Références bibliographiques : 30 ref.

Date :
2012

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena

Langue :
Anglais
Droits :
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