Maisbich (Luxemburg) river basin discharge data, sensor Q4, month 2007-10

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)

父项：迈斯比奇（Maisbich，卢森堡），数据源自Q4（Qup）排放流量计（discharge meter），采集时段为2006年12月及以后。
测量仪器：迈斯比奇水槽：V型缺口排放流量计（V-notch discharge meter）Q4（Qup）。
型号：Van Essen TD-Driver，序列号SN 19613。
该仪器采用单台绝对传感器（absolute sensor）测量压力，同时可同步测量温度。
传感器上方的V型缺口高度为0.0018米。
带校正项的数据集包含在V型缺口处观测得到的校正后流量值。流量计算公式为：Q = Cd·h^2.5。
在利用手动测量的水深对记录仪测量数据完成校正后，我们对差值（dH）进行了插值处理。随后我们通过同样经插值处理的流量测量值，确定了流量系数Cd。
可对手动测量的时间戳进行校正，以更准确地匹配记录仪记录的数值。
最终校正项（变量"clean_corr"）针对V型缺口堰（V-notch weir）的堵塞情况设置规则如下：
z1代表沉降开始缓慢堵塞堰体后的最后一组有效流量值；
z2代表堰体堵塞程度达到峰值的时刻；
z3代表堰体清理前不久的时刻；
z4代表堰体清理完成后的时刻。
流量的最大差值为Q(z3) - Q(z4)。