标题:
澧水洪水特征及变化规律Flood Characteristics and Variation of Lishui River
作者:
李志龙, 毛德华, 冯畅
关键字:
澧水, 洪水特征, 趋势分析, 周期分析Lishui River; Flood Characteristics; Trend Analysis; Cycle Analysis
期刊名称:
《Journal of Water Resources Research》, Vol.2 No.3, 2013-06-20
摘要:
收集了澧水津市与石门两个水文站年最大流量及最高水位资料，据此，分析了澧水洪水特征。计算了津市与石门最大流量及最高水位统计值：均值、方差、变差系数、偏态系数，并分析了洪水统计特征；奇异谱趋势分析表明津市站最大流量与最高水位均呈上升趋势，石门站则均呈下降趋势；澧水洪水周期性分析表明，石门与津市两个水文站洪水均存在约4年与2年两个周期的谱峰，但此2周期均不显著；计算了津市站与石门站各频率洪水流量，并根据水位流量关系，推算出津市与石门水文站各频率的设计水位。
Hydrological station annual maximum discharge and the highest water level data of Jinshi and Shimen are collected, and according to these, the flood characteristics of Lishui River are analyzed. Two hydrological station maximum discharge and highest water level statistical value-mean, variance, coefficient of variation, coefficient of skewness are calculated, and statistical characteristics of the flood are analyzed; singular spectrum trend analysis indicates Jinshi station maximum discharge and the highest water level for all show ascendant trend, and the Shimen station is a declining trend. Flood periodicity analysis of Lishui River showed that there were two cycles of the spectrum peak about 4 and 2 years of Shimen and Tianjin hydrological stations, but these two cycles were not significant. Discharge frequencies of Jinshi and Shimen hydrological stations are calculated, and according to the relation between water level and discharge, the frequencies of the design water level of Jinshi and Shimen hydrological station are obtained.