摘要
从感潮河段取水时,其保证率受潮汐影响显著。根据钱塘江河口潮水位、含氯度和含沙量的变化特点,提出了综合保证率计算方法。以实测资料为基础,建立了钱塘江四格与固定水文站七堡的水位、含氯度的相关关系,插补延长了四格1997-2008年长系列水位、含氯度资料,分析得到从四格取水水位大于3.12m的保证率为93%,含氯度不大于0.25×10^(-3)的保证率为84%;通过建立四格大中小潮含沙量与历时的关系,分析得到四格含沙量不大于0.2kg/m^3的保证率为79%;最后得到金沙湖从四格取水的综合保证率为72%。
The guarantee rate of water intake would be influenced significantly by tide variation while intaking water from tidal affect‐ed reach .According to the change characteristics of the water stage ,chlorinity ,sediment concentration in Qiantang Estuary ,this pa‐per put forward the calculation method of comprehensive guarantee rate of water intake .Based on the observed data ,correlation of tide stage between Qibao stage and Sige stage ,chlorinity between Qibao stage and Sige stage were built up ,and the data series of Sige stage was prolonged by the correlation .The guarantee rate of tide stage higher than 3 .12 m was 93% ,and the guarantee rate of chlorinity no more than 0 .25 × 10-3 was 84% by the long series analysis .The guarantee rate of sediment concentration no more than 0 .2 kg/m3 was 79% analyzed by the correlation of sediment concentration and duration in large ,medium and low tide .Finally ,the comprehensive guarantee rate of water intake at Sige station is 72% .
出处
《中国农村水利水电》
北大核心
2016年第9期163-167,共5页
China Rural Water and Hydropower
关键词
钱塘河口
水位
含氯度
含沙量
保证率
Qiantang Estuary
water stage
chlorinity
sediment concentration
guarantee rate
