摘要
分期洪水特征研究能进一步了解洪水季节性变化规律。基于龙滩水库1960年~2012年各分期洪峰流量资料,利用滑动平均法、累计距平法、Mann-Kendall检验法和小波分析,对各分期洪水趋势性、突变性和周期性特征的研究显示,前汛期和主汛期洪峰流量分别以平均每年3.31 m^3/s和5.27 m^3/s的速率缓慢上升,后汛期以平均每年30.02 m^3/s的速率下降;前汛期和后汛期洪峰流量突变次数均为4次,多于主汛期的突变次数(2次);前汛期洪峰流量以24 a为变化主周期,主汛期洪峰流量以15 a为变化主周期,后汛期以18 a为变化主周期。
The study on peak discharge characteristics based on flood season staging can help further understand flood seasonal change law. Based on each staged peak discharge of flood season dataset in Longtan Reservoir during 1960 - 2012, the peak discharge characteristics are analyzed by using the methods of moving average, accumulative anomaly, Mann-Kendall and wavelet analysis. The results show that, （a） the peak discharges in early flood season and in main flood season rise slowly at an average annual rate of 3.31 m3/s and 5.27 m3/s respectively, while the peak discharge in late flood season decreases at an average annual rate of 30.02 m3/s; （b） the mutations take place four times both in early flood season and late flood season while in the main flood season two times; （c） the peak discharge had a main period of 24 a for the early flood season, 15 a for the main flood season and 18 a for the late flood season.
出处
《水力发电》
北大核心
2018年第3期5-9,46,共6页
Water Power
基金
国家自然科学基金资助项目(51569003)
广西自然科学基金资助项目(2017GXNSFAA198361)
广西研究生教育创新计划资助项目(YCSW2017052)
