Maisbich (Luxemburg) river basin discharge data, sensor Q4, month 2007-06

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：Maisbich（卢森堡），数据来源于2006年12月及以后的Q4流量计（discharge meter Q4，Qup）
测量仪器：Maisbich流域：V型缺口流量计（V-notch discharge meter Q4，Qup）
型号：Van Essen TD-Driver，序列号（SN）19613
该仪器采用一个绝对传感器（absolute sensor）测量压力，同时测量温度
传感器上方V型缺口的高度为0.0018米
含校正的数据集包含V型缺口处观测到的校正后流量（discharge）
流量计算公式为Q=Cd*h^2.5
利用手工测量深度（hand measured depths）校正记录仪测量值（logger measurements）后，我们对差值（dH）进行了插值
随后，我们通过插值得到的流量测量值确定了Cd因子
手工测量的时间可校正以更准确地反映记录值
最后的校正（变量“clean_corr”）针对V型缺口堰（V-notch weir）堵塞问题，具体如下：
z1代表堰体开始因淤积缓慢堵塞前的最后一个有效流量值
z2代表堵塞程度达到最大的时刻
z3代表堰体清理前的时刻
z4代表堰体清理后的时刻
最大流量差为Q(z3)-Q(z4)