基于分形理论的华南山区大型水利枢纽洪水分期研究
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摘要
洪水分期是流域水文要素形态随时间变化规律的关键指标,在防洪管理及水利工程运行调度中发挥重要作用。分形理论是现代非线性科学的一个重要分支,是对具有自相似特性几何空间数据的重要分析工具和手段。为此,运用分形理论分析了华南山区典型大型水利工程——乐昌峡枢纽所在流域水文时间序列特征,研究了该流域水文序列的季节变异规律,并与传统方法得到的分期结果进行比较。结果表明,乐昌峡枢纽前汛期为3月1日～4月10日,主汛期为4月11日～6月30日,后汛期为7月1日～9月30日,与传统方法分期结果基本一致,且结果更加客观。
Flood stage is a key indicator of the pattern of hydrological factors over time in the basin,and plays an important role in flood control management and operation and scheduling of water conservancy projects.Fractal theory is an important branch of modern nonlinear science and an important analytical tool and means for geometric spatial data with self-similar characteristics.The fractal theory was used to analyze the hydrological time series characteristics of Lechangxia hydro project-a typical large-scale water conservancy project in the mountainous area of South China,and the seasonal variation of the hydrological sequence in the basin was studied.Compared with the staging results obtained by the traditional method,the results show that the pre-flood season of the Lechangxia hydro project is from March 1 st to April10 th,the main flood season is from April 11 th to June 30 th,and the post-flood season is from July 1 st to September30 th.The result is basic consistent with the traditional method,and is more objective.
Flood stage is a key indicator of the pattern of hydrological factors over time in the basin,and plays an important role in flood control management and operation and scheduling of water conservancy projects.Fractal theory is an important branch of modern nonlinear science and an important analytical tool and means for geometric spatial data with self-similar characteristics.The fractal theory was used to analyze the hydrological time series characteristics of Lechangxia hydro project-a typical large-scale water conservancy project in the mountainous area of South China,and the seasonal variation of the hydrological sequence in the basin was studied.Compared with the staging results obtained by the traditional method,the results show that the pre-flood season of the Lechangxia hydro project is from March 1 st to April10 th,the main flood season is from April 11 th to June 30 th,and the post-flood season is from July 1 st to September30 th.The result is basic consistent with the traditional method,and is more objective.
引文
[1]Mandelbrot B B.Fractal:Form,Chance and Dimension[M].San Francisco:Freeman,1977.
[2]王中雅,闻余华,董家根.基于分形理论的太湖洪水分期研究[J].中国农村水利水电,2015(2):118-122.
[3]石月珍,李淼,郑仰奇.基于分形理论的湘江流域洪水分期研究[J].水土保持通报,2010,30(5):165-167.
[4]孙博玲.分形维数(Fractal dimension)及其测量方法[J].东北林业大学学报,2004,32(3):116-119.
[5]钟逸轩,林凯荣,李俊.北江乐昌峡水库流域汛期分期研究[J].水资源研究,2014,3(4):351-359.
[2]王中雅,闻余华,董家根.基于分形理论的太湖洪水分期研究[J].中国农村水利水电,2015(2):118-122.
[3]石月珍,李淼,郑仰奇.基于分形理论的湘江流域洪水分期研究[J].水土保持通报,2010,30(5):165-167.
[4]孙博玲.分形维数(Fractal dimension)及其测量方法[J].东北林业大学学报,2004,32(3):116-119.
[5]钟逸轩,林凯荣,李俊.北江乐昌峡水库流域汛期分期研究[J].水资源研究,2014,3(4):351-359.