红河流域径流演变分异及其特征

红河流域径流演变分异研究对于揭示流域径流的形成、演变规律及跨境水管理具有重要意义。选取红河流域9个代表站点,利用累积距平法、滑动t检验和Mann-Kendall-Sneyers法研究了红河流域的径流演变分异。结果表明,径流演变空间差异显著,各控制断面波动不一致;流域各站点(除大东勇站)均出现径流突变,但突变时间不一致,且越往下游,突变时间越晚;此外,各站点丰枯转化时段不一致。

Study on the Runoff Variation and Its Characteristics of Red River Basin

The study on the runoff variation in the Red River basin is important to reveal the formation, evolution law of runoff and the management of transboundary water. Based on the runoff data of nine hydrological stations in the Red River basin, cumulative anomaly method, Mann Kendall Sneyers test and sliding t test were used to study the runoff variation. The results show that the runoff spatial variation is significant. In addition, an unconsistent decadal fluctuation turns up around the stations. Moreover, the abrupt change points of interannual runoff in these stations have been detected. But the change time is quiet distinct. The change time turns up later as the station is more closer to the downstream. Finally, the wet and dry alternation period is quiet diffident among these stations.