韩江潮安水文站水沙特征分析
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摘要
运用Mann-Kendall法对潮安水文站1955—2016年的水沙资料进行研究分析。结果表明:潮安水文站输沙量和径流量年内分配不均匀,水沙量均集中在汛期;各年代输沙量变化程度比径流量剧烈; 62 a间径流量呈现不显著增加趋势,而输沙量呈现显著减少趋势。输沙量在1998年产生突变,突变后输沙量变幅更大。
In this paper,Mann-Kendall method is used to analyze the runoff and sediment data of Chaoan hydrometric station during 1955—2016. The results show that the sediment discharge and the runoff of Chaoan hydrometric station are unevenly distributed during the year,both of them are concentrated in the flood season. The sediment discharge changes intensely than the runoff in each age. The runoff does not increase significantly,while the sediment discharge decreases significantly in the past 62 years. The sediment dischargehada mutation in 1998 and changedmore intensely after the mutation than before.
In this paper,Mann-Kendall method is used to analyze the runoff and sediment data of Chaoan hydrometric station during 1955—2016. The results show that the sediment discharge and the runoff of Chaoan hydrometric station are unevenly distributed during the year,both of them are concentrated in the flood season. The sediment discharge changes intensely than the runoff in each age. The runoff does not increase significantly,while the sediment discharge decreases significantly in the past 62 years. The sediment dischargehada mutation in 1998 and changedmore intensely after the mutation than before.
引文
[1] Mann H B. Nonparametric tests against trend[J].Econometrica,1945,13(3):245-259.
[2] Goossens C H,Berger A. Annual and seasonal climatic variations over the northern hemisphere and Europe during the last century[J]. Annales Geophysicae,1986(4):385-400.
[3]魏凤英.现代气候统计诊断与预测技术[M].北京:气象出版社,1999.
[4]邓雪原.东江流域年平均含沙量序列突变点检测[J].广东水利水电,2011(2):19-21.
[5]张正栋.广东韩江流域土地利用与土地覆盖变化综合研究[D].广州:中国科学院广州地球化学研究所,2007.
[2] Goossens C H,Berger A. Annual and seasonal climatic variations over the northern hemisphere and Europe during the last century[J]. Annales Geophysicae,1986(4):385-400.
[3]魏凤英.现代气候统计诊断与预测技术[M].北京:气象出版社,1999.
[4]邓雪原.东江流域年平均含沙量序列突变点检测[J].广东水利水电,2011(2):19-21.
[5]张正栋.广东韩江流域土地利用与土地覆盖变化综合研究[D].广州:中国科学院广州地球化学研究所,2007.