Maisbich (Luxemburg) river basin discharge data, sensor Q3, month 2008-08

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：卢森堡迈斯比奇（Maisbich），2006年11月及之后的流量计量仪Q3（Qdown）观测数据。 测量仪器：迈斯比奇测流池V形缺口式流量计量仪（V-notch discharge meter）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的差压测量原理，可同步采集压力与温度数据。 传感器上方V形缺口的安装高度：-0.0015米。 带校正项的数据集包含经校正的V形缺口观测流量。流量计算公式为 Q=Cd*h^2.5。 我们先以人工实测水深对数据记录仪的测量值进行校正，随后对差值（dH）开展插值处理；再结合经插值的流量实测结果，推导得到流量系数Cd。 可对手工测量的时间戳进行校正，以更贴合数据记录仪的记录值。 本次最终校正（变量"clean_corr"）针对V形缺口堰（V-notch weir）的堵塞情况制定，具体规则如下：z1代表淤积逐步开始堵塞堰体前的最后一组有效流量观测值；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)。