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- Title
Shift trend and step changes for runoff time series in the Shiyang River basin, northwest China.
- Authors
Z. L. Li; Z. X. Xu; J. Y. Li; Z. J. Li
- Abstract
The article presents a study on the shift trend and step changes for runoff time series in the Shiyang River basin in northwest China. It states that seven statistical test approaches were used to determine the shift trends and step changes in the study. It discusses that Mann-Kendall test, Spearman's Rho test, linear regression and Hurst exponent were utilized to detect past and future shift trends for runoff time series, while the distributed-free CUSUM test, cumulative deviations and the Worsley likelihood ratio test were employed to detect step changes for the same time series. Results showed that the annual runoff from Zamu, Huangyang and Gulang rivers demonstrate statistically significant decreasing trends.
- Subjects
CHINA; RUNOFF; HYDROLOGIC cycle; HYDROLOGY; WATERSHEDS; REGRESSION analysis; EXPONENTS; STREAMFLOW; RIVERS
- Publication
Hydrological Processes, 2008, Vol 22, Issue 23, p4639
- ISSN
0885-6087
- Publication type
Article
- DOI
10.1002/hyp.7127