富春江电站与之江水文站径流量相关关系研究

Research on Correlation between Runoff Volumes of Fuchunjiang Hydropower Plant and Zhijiang Station

建立富春江电站与之江水文站径流量的相关关系,延长之江水文站的径流资料,对于掌握钱塘江多年入海径流量具有重要意义。采用富春江电站与之江水文站2012年、2014年的月、旬、日平均流量进行回归分析。结果表明,2站之间月、旬平均流量的相关性较强,相关系数分别可达到0.9900、0.9800,日平均径流量的相关性略差,相关系数仅为0.9400;误差分析结果表明,汇总2 a资料建立的相关关系比仅用1 a建立的相关关系更为合理,推求之江水文站的径流量建议采用汇总2 a资料建立的回归公式计算。

To comprehend the Qiantang River’s annual runoff into the sea,it is significant to establish a correlation between runoff volumes of Fuchunjiang Hydropower Plant and Zhijiang Hydrologic Station and extend the runoff data at the Zhijiang station.This paper conducted a regression analysis on the monthly,10 - day period and daily average runoff volumes of the two stations in 2012 and 2014. Results suggest that there was a strong correlation between the monthly and 10 - day period average runoff volumes of the two stations,with correlation coeffcient of 0.9900 and 0.9800 respectively,while the daily average runoff volumes were less correlated with correlation coeffcient of 0.9400.Error analysis showed that the correlation established on 2 - year data was more reasonable than that of using 1 - year data.It is proposed to set up a regression formula combining 2 - year data for inquiry of runoff volume of Zhijiang Hydrologic Station.