Calculated data from sensor Q3 at Maisbich for month 2003-12

Height V-notch above sensor -0.0015 m Parent item: Maisbich (Luxemburg), calculated data from discharge meter Q3, 2003-12 to 2006-10 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) Contributor: Durr, E.H.(Eugene)

传感器上方V型缺口（V-notch）高度：-0.0015米
父项：Maisbich（卢森堡），2003年12月至2006年10月期间由Q3流量计（discharge meter）计算得到的数据
测量仪器：Maisbich流域：V型缺口（V-notch）流量计（discharge meter）Q3（Qdown）
类型：Keller DCX-4.0压力传感器（Pressure Sensor），序列号1467
该仪器基于两个绝对传感器（absolute sensors）的差压测量（differential pressure measurement）原理。传感器测量压力和温度。
传感器上方V型缺口（V-notch）高度：-0.0015米。
含校正的数据集包含V型缺口（V-notch）处观测到的校正流量。流量计算公式为Q=Cd*h^2.5。
使用手工测量的深度校正记录仪数据后，我们对差值（dH）进行了插值。随后，我们通过同样经过插值的流量测量值确定了Cd系数。
手工测量的时间可进行校正，以更好地反映记录仪数值。
最后一次校正（变量"clean_corr"）针对V型缺口（V-notch）堰（weir）的堵塞问题，具体如下：z1代表沉积（sedimentation）开始缓慢堵塞堰（weir）之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（weir）清理前的时刻；z4代表堰（weir）清理后的时刻；流量的最大差值为Q(z3)-Q(z4)。
贡献者：Durr, E.H.（Eugene）