Maisbich (Luxemburg) river basin discharge data, sensor Q3, month 2008-11

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)父数据集项： 卢森堡迈斯比奇（Maisbich）站点，取自Q3（Qdown）型流量计量装置的观测数据，采集时段为2006年11月及以后。 测量装置： 迈斯比奇堰池：三角堰（V-notch）流量计量装置Q3（Qdown） 型号：凯勒DCX-4.0型压力传感器，序列号（SN）1467 该装置基于两台绝对式传感器的差压测量原理工作，可同步采集压力与温度数据。 三角堰相对于传感器的安装高度：-0.0015米。 经过校正的数据集包含在三角堰处观测得到的校正后流量数据。 流量计算公式为：Q=Cd*h^2.5 先以人工测量的水深对记录仪采集的观测数据完成校正，再对差值（dH）进行插值处理。 随后通过同样经插值处理的流量观测数据确定流量系数Cd。 可对人工测量的时间节点进行校正，以更准确地匹配记录仪的记录数据。 本次最终校正（变量名"clean_corr"）针对三角堰的堵塞情况开展，校正逻辑如下： z1代表淤积逐步开始堵塞堰体前的最后一组有效流量数值； z2代表堰体堵塞程度达到峰值的时刻； z3代表对堰体进行清淤前的临界时刻； z4代表完成清淤后的时刻； 流量的最大差值为Q(z3)-Q(z4)。