Title: Change and Trend Analysis on Tereng River's Runoff
Abstract: This paper presented the analysis on the hydrological features of runoff and its change over the last 50 years in Tereng River basin.Mann-Kendall trend test and other hydrologic statistical approaches were used to detect the possible change in runoff in annual and seasonal basis.The runoff data refers to 1959—2008,and obtained from the Tereng Hydrological Station at the river's outlet. The results show that the distribution of annual runoff is highly imbalanced between the four seasons,and mostly concentrated in summer. The change of runoff on annual step shows less fluctuation with relatively small C V value during the whole study period,and the annual runoff after 1990s exceeds the long time average annual runoff with obvious increment. The Mann- Kendall test results in the identification of an overall increasing trend in annual runoff statistically significant. Similar increasing trends in the spring,summer and autumn runoff is detected statistically significant while the upward trend in winter runoff is found statistically non- significant. Three points in time of the beginning of a developing trend is detected respectively in 1960,1962 and 1983respectively. The increasing trend of annual runoff is non- significant before 1990s and significant after the 1990s.
Publication Year: 2013
Publication Date: 2013-01-01
Language: en
Type: article
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