抄録
Although water elevation is generally assumed to be uniform in the lateral direction, there has been little information on measured results for lateral variations of water elevation in rivers under floods. In the present study, we performed water elevation measurements at several cross-sections of the Edogawa River. Results showed that the differences of water elevation between the main channel and the floodplain that occurred during flooding were mainly due to a small mound that was formed between the main channel and the floodplain that prevented any water exchange between the two. The influence of lateral variations of water elevation on the evaluation of roughness parameters and river discharge was examined.
