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为合理开发、高效利用安哥拉宽扎河水力资源,需深入分析其河川径流的演变特性。基于堪班贝站天然径流资料,采用Mann-Kendall秩次相关检验法、滑动t检验法等统计学方法,分析了径流的变化趋势和突变特性。结果表明,年径流量和汛期径流量均有减少趋势,但变化趋势不显著;非汛期径流量有显著的减少趋势,若未来维持该趋势,将加剧径流的年内丰枯差异,对水资源综合利用产生不利影响;年径流量和汛期径流量在1970、2001年发生突变,非汛期径流量在1971、2004年发生突变,突变点前后序列的变化趋势均发生改变。
In order to develop and utilize the Kwanza River’s hydraulic resources reasonably, it is necessary to deeply analyze the evolution characteristics of the river runoff. Based on the natural runoff data from the Kabanibei Station, Mann-Kendall rank correlation test and sliding t test were used to analyze the trend of runoff and the mutation characteristics. The results showed that both annual runoff and runoff in flood season decreased, but the trend of change was not significant. Non-flood season runoff decreased significantly. If the trend is to be maintained in the future, the differences in runoff during the year will be aggravated, The annual runoff and flood season runoff changed suddenly in 1970 and 2001, and non-flood runoff occurred in 1971 and 2004 respectively. The trend of change before and after the change point changed.