Maisbich (Luxemburg) river basin discharge data, sensor Q3, month 2007-05

Parent item: Maisbich (Luxemburg), data from discharge meter Q3 (Qdown), 2006-11 and later Measuring instrument: Maisbich basin: V-notch discharge meter Q3 (Qdown) Type: Pressure Sensor Keller DCX-4.0, SN 1467 This instrument is based on differential pressure measurement of two absolute sensors. The sensors measure pressure and temperature. Height of V-notch above sensor: -0.0015m. 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（卢森堡），数据取自2006年11月及之后的Q3（Qdown）排放流量计（discharge meter）。
测量仪器：迈斯比奇堰槽：V型缺口（V-notch）排放流量计Q3（Qdown）。
型号：凯勒DCX-4.0型压力传感器（Pressure Sensor），序列号SN 1467。该仪器基于双绝对传感器差压测量（differential pressure measurement）原理，可同步采集压力与温度数据。V型缺口相对于传感器的安装高度为-0.0015米。
带校正标记的数据集包含经校正后的V型缺口堰观测流量数据。流量计算公式为Q=Cd*h^2.5。
在将手动测量的水深数据与数据记录仪（logger）的测量结果完成校正后，我们对二者的差值（dH）进行了插值处理。随后结合同样经过插值处理的流量测量结果，推导得到流量系数Cd。可对手动测量的时间戳进行校正，以更贴合记录仪的记录值。
本次最终校正对应变量"clean_corr"，针对V型缺口堰的堵塞情况制定规则如下：
z1代表淤积开始缓慢堵塞堰体前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代表堰体清理前的临界时刻；
z4代表堰体清理完成后的时刻。
流量的最大偏差为Q(z3)-Q(z4)。