Rating Curves for Rivers With Overbank Flow.

Reach scale floodplain inundation dynamics observed using airborne synthetic aperture radar imagery: Data analysis and modelling

“…As with all flow data acquired via a rating curve, errors will increase at higher flows and in particular will be greater when flow is out of bank. Both these conditions apply here and previous studies of rating curve accuracy in such situations indicate that errors in measured flow of up to ±20% may occur (Ervine and Baird, 1982). This is likely to be much greater than the net sum of all other components of the hydrological mass balance along the reach.…”

“…6. Based on previous studies (Ervine and Baird, 1982) we assume the error in gauged discharge for overbank flow for this reach may be as much as ±20%. Assessing the error in ASAR estimates of flooded area is more difficult due to lack of ground truth data, however for satellite SAR systems this has been found to be of the order of ±10% .…”

Flow movement and sediment transport in compound channels

“…Myers (1978), Wormleaton et al (1982), and Prinos and Townsend (1984) considered the discharge calculated using the "single channel"-method which was found 16-40% smaller than from observations, and that the error gradually increases with the resistance in the main channel and floodplain. Prinos and Townsend (1984), Ervine and Baird (1982), and Wormleaton and Merrett (1990) suggested that the main channel and floodplain should be treated separately. The total discharge was calculated by summing the discharges of the various subsections.…”

A preliminary investigation of the integration of modelled floodplain hydraulics with estimates of overbank floodplain sedimentation derived from Pb‐210 and Cs‐137 measurements

“…Fawcett et al, 1995), particularly where the model has been calibrated or where there may be uncertainty over the observed data. In this case, rating curves for out-of-bank flow are notoriously difficult to estimate accurately (see Ervine and Baird, 1982) and this may be a factor here. Having achieved a calibrated run on the long reach, coarse mesh, it was possible to extract the necessary boundary condition input and output hydrographs for the fine mesh.…”