Maisbich (Luxemburg) river basin discharge data, sensor Q3, month 2006-11

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)

Parent item: Maisbich（卢森堡），2006年11月及以后来自Q3（Qdown）流量计的数据
Measuring instrument: Maisbich流域：V型缺口流量计Q3（Qdown）
Type: Keller DCX-4.0压力传感器，序列号1467
该仪器基于两个绝对传感器的差压测量原理，可同时测量压力与温度。
V型缺口相对于传感器的高度：-0.0015米
经校正的数据集包含V型缺口处观测到的校正流量值。
流量计算公式为Q=Cd*h^2.5
利用手工测量的水深校正记录仪数据后，我们对差值（dH）进行了插值处理。
随后，我们通过同样经过插值的流量测量值确定了系数Cd。
手工测量的时间点可进行校正，以更准确地匹配记录仪数据。
针对V型缺口堰的堵塞问题，最后进行的校正（变量"clean_corr"）如下：
z1代表淤积开始缓慢堵塞堰体前的最后一个有效流量值
z2代表堵塞程度达到最大值的时刻
z3代表堰体清理前的瞬间
z4代表堰体清理后的瞬间
最大流量差值为Q(z3)-Q(z4)