涝河涝峪口水文站洪水资料分析计算

Analysis and Calculation of Flood Data in Weihe River Hydrological Station

涝河属渭河右岸一级支流,涝峪口水文站建在涝河出峪口,该站已有1944年～2017年74年实测水文资料。通过整理涝峪口水文站实测洪水系列,对资料系列的可靠性、一致性和代表性进行审查,得出该水文站资料系列具有良好的代表性。根据涝峪口水文站74的年洪水资料,加入1898年调查洪水,按不连序系列进行频率计算,用矩法估算统计参数初始值,并经过P-Ⅲ型曲线目估适线,得出涝峪口水文站100年一遇洪峰流量为1000 m^3/s,50年一遇洪峰流量为790 m^3/s,30年一遇洪峰流量为640 m^3/s,20年一遇洪峰流量为520 m^3/s,10年一遇洪峰流量为340 m^3/s。

The Lao river belongs to the first-level tributary of the right bank of Weihe River.Laoyukou Hydrological Station is built at the exit of Weihe River.The station has had 74-year measured hydrological data from 1944 to 2017.By reviewing the series of measured floods at the Shuikou Hydrological Station,the reliability,consistency and representativeness of the data series were reviewed,and the hydrological station data series was well represented.According to the annual flood data of Laoyukou hydrological station 74,the flood was investigated in 1898,the frequency calculation was carried out according to the unsequence series,and the initial value of the statistical parameters was estimated by the moment method,and the P-III curve was used to estimate the appropriate line.The flood peak flow rate of the mouth of the Shuikou hydrological station is 1000m^3/s in 100 years,and the flood peak flow rate is 790m^3/s in 50 years.The flood peak flow rate is 640m^3/s in 30 years,and the flood peak flow rate in 2020 is 520m^3/s,10 The annual peak flow rate is 340m3/s.