Abstract
Earlier parts of this series of papers have described the accuracy achieved operationally in gauge-calibrated radar estimates of rainfall; the effects of inaccuracies in radar estimates of rainfall, input to a simple ISO (Input—Storage—Output) hydrological model, are illustrated here. Simulations of river flow, made using this model driven by both radar and gauge estimated rainfall, are compared with the relevant observed hydrographs. These results are generalised by mapping errors in radar estimates of rainfall to errors in flow forecast for various catchments. Finally, methods of dealing with erroneous flow predictions, which may occur on some occasions, are discussed.
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