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| Analysis on the characteristics of runoff time series in Hutubi River Basin |
| Bai Dongming1,Li Weihong2,Hao Xingming2,Yang Xiaoming3 |
| 1.Hutubi River Basin Developent and Construction Bureau,831200,Hutubi,Xinjiang;2.Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,830011;3.Computer Department,Xinjiang Petroleum Institute,830000: Urumqi,China |
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Abstract Several runoff statistical parameters,namely concentration ratio,concentration period,variation coefficient,kurtosis,wet-dry transformation ratio etc were analyzed in the paper based on the fifty years' annual runoff data in Shimen gauge station of Hutubi River.The result showed that the characteristics of annual runoff in Hutubi River had close relations with runoff-supplying sources.The allocation of discharge is extremely uneven,and has a quite high concentration within one year and the concentration ratio is 66.47%.On the other hand,for many years,variation coefficient of annual discharge has lower value(0.15) and the tendency of annual discharge change is relatively steady.The further analysis based on the Mann-Kendall method showed that the runoff was increased in the last fifty years.The result of R/S analysis(Rescaled Range Analysis) indicated that the runoff changing tendency had strong persistence trend,especially the yearly Hurst index reach to 0.8.That means the runoff will increase in the next period.
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Received: 02 January 2007
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