Characteristics of Runoff Changes over Last 50 Years in the Middle and Lower Reaches of Dongjiang River
Abstract: Based on the monthly runoff data of the Heyuan and Boluo station in the middle and lower reaches of Dongjiang River from 1956 to 2005, changes trend and abrupt changes of runoff variation were analyzed by the methods of linear trend analysis, moving average, moving t-test, Yamamoto and sequential cluster analysis. Some important results were obtained in three aspects as follows. 1) The annual runoff at the He-yuan and Boluo station had an unobvious increase and decrease trend, respectively, and change tendency rate of them were 0.38 × 108 m3/10a and –0.46 × 108 m3/10a, respectively; 2) The spring and winter runoff in the middle and lower reaches of Dongjiang River had an increase trend, while the summer and autumn runoff had an decrease trend, but they did not arrive at α = 0.05 statistically significant level; 3) The annual runoff at the Heyuan station as well as winter runoff at the Heyuan and Boluo station had significant abrupt changes. The abrupt changes of the annual runoff at the Heyuan station occurred in 1972, while winter runoff at the Heyuan and Boluo station had significant abrupt changes in the early 1970s.
文章引用: 彭 涛 , 陈晓宏 , 王高旭 , 刘冀 , 李英海 (2012) 近50年东江中下游径流时序演变特征。 水资源研究， 1， 334-339. doi: 10.12677/JWRR.2012.15051
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