基于沙里寨水文站水面流速系数分析研究

Analysis and study on water surface flow velocity coefficient based on Shalizhai Hydrological Station

在实测河道流量时,往往因为洪水涨落急剧、洪峰历时短无法采用多点法施测流速;或在采用浮标法及缆道流速仪法施测流量时,多采用水面一点法施测流速,而在计算垂线平均流速时涉及水面流速系数的问题。通过对大洋河沙里寨水文站实测的垂线五点流速,建立水面与垂线平均流速相关关系,确定该站水面流速系数。

When the river flow capacity is actually measured,multi-point method cannot be adopted for measuring the flow velocity due to sharp flood falling and rising as well as short flood peak duration; or when buoy method and cable current meter method are adopted for measuring flow velocity,water surface one-point method is mostly adopted for measuring the flow velocity. When vertical average flow velocity is measured, water surface flow velocity coefficient is involved.Relationship between water surface and vertical average flow velocity is established through vertical five-point flow velocity actually measured in Dayang River Shalizhai Hydrological Station.