Maisbich (Luxemburg) river basin discharge data, sensor Q4, month 2007-01

Parent item: Maisbich (Luxemburg), data from discharge meter Q4 (Qup), 2006-12 and later Measuring instrument: Maisbich basin: V-notch discharge meter Q4 (Qup) Type: Van Essen TD-Driver, SN 19613 This instrument measures pressure with one absolute sensor. It also measures temperature. Height V-notch above sensor: 0.0018m. Datasets with correction contain the corrected discharge observed at the Vnotch. The discharge is calculated as Q=Cd*h^2.5 After correcting the logger measurements with hand measured depths we interpolated the difference (dH) Then we determined the factor Cd with discharge measurements which we also interpolated The timing of hand measurements can be corrected to better represent the logged values The last corrections (variable "clean_corr") were made for blocking of the V-notch weir as folows: z1 represents the last good discharge value after which sedimentation slowly starts blocking the weir z2 represents the moment when the blocking is max z3 represents the moment just before cleaning of the weir z4 represents the moment after cleaning of the weir The max difference in discharge is Q(z3)-Q(z4)

父数据集项：卢森堡迈斯比奇（Maisbich）站点，数据取自Q4（Qup）型测流计，记录时段为2006年12月及之后。
测量仪器：迈斯比奇测流槽配套三角堰（V-notch）测流计Q4（Qup）
型号：Van Essen TD型驱动装置，序列号19613
该仪器搭载单路绝对压力传感器采集压力数据，同时可同步测量温度。
传感器上方三角堰高度为0.0018米。
经校正的数据集包含三角堰处测得的校正后流量数据，流量计算公式为Q=Cd·h^2.5。
我们先通过手工实测水深对记录仪采集的数据进行校正，随后对差值（dH）进行插值处理；再基于经插值处理的流量测量数据确定流量系数Cd。
手工测量的时间戳可进行校正，以更贴合记录仪的记录时序。
最终校正（变量"clean_corr"）针对三角堰（V-notch weir）的堵塞工况开展，校正规则如下：
z1为最后一组有效流量值，此后淤积逐步开始堵塞堰体；
z2为堰体堵塞程度达到峰值的时刻；
z3为堰体清理前的瞬时时刻；
z4为堰体清理完成后的瞬时时刻。
最大流量差值为Q(z3)-Q(z4)。