Surfacewater - daily surface water discharges in catchment at Cabauw

Discharge has been measured at three locations. At these locations, measurement weirs have been installed in May 2007 to estimate discharges accurately. A V-notch weir is used to measure the inflow of surface water into the catchment near the Wielse Kade (Qin). Trapezoidal Rossum weirs have been installed to measure outflow (Qout1 and Qout2), of which the stage-discharge relations have been obtained by laboratory calibration. The uncertainty associated with the discharge measurement can be considerable in some cases.

数据采集于三个不同地点。自2007年5月起，于这些地点安装了测量堰以精确估算流量。在Wielse Kade（Qin）附近的流域，采用V型缺口堰来测量地表水流入量。此外，为测量出流量（Qout1和Qout2），安装了梯形Rossum堰，其水位-流量关系已通过实验室校准获得。在某些情况下，流量测量的不确定性可能相当显著。