Maisbich (Luxemburg) river basin discharge data, sensor Q4, month 2008-08

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)

父数据集：梅斯比希（卢森堡），数据取自Q4（Qup）型流量计，采集时间为2006年12月及之后。测量仪器：梅斯比希测槽配套Q4（Qup）型V形堰流量计，型号为Van Essen TD-Driver，序列号SN 19613。该仪器搭载1个绝对压力传感器以测量压力，同时可采集温度数据。传感器上方的V形堰高度为0.0018米。带校正标记的数据集包含在V形堰处观测得到的校正后流量，流量计算公式为Q=Cd*h^2.5。在利用手工测量的水深对记录仪测量数据完成校正后，我们对差值（dH）进行了插值处理；随后通过同样经插值的流量测量数据，确定了流量系数Cd。可对手工测量的时间戳进行校正，以使其更贴合记录仪记录的数值。最后一项校正（变量"clean_corr"）针对V形堰的堵塞情况开展，校正规则如下：z1代表淤积开始缓慢堵塞堰体前的最后一组有效流量数值；z2代表堰体堵塞程度达到峰值的时刻；z3代表堰体清淤前的瞬时时刻；z4代表堰体清淤完成后的瞬时时刻；流量的最大差值为Q(z3)-Q(z4)。