STRUCTURE OF FLOOD FLOW IN THE TONE RIVER WITH VEGETATION CLUSTERS ALONG LOW-WATER CHANNEL BANK

Abstract

Large horizontal eddies were observed in aerophotograph taken in the flood of the Tone river with vegetation near bank. Observed flow pattern was examined by applying 2-D shallow water model to flood flow. It was shown that large horizontal structures of flow which meanders along vegetated area near river bank, exist and agree with the structure of the flow calculated by 2-D model. The boundary mixing coefficient predicted by authors was shown to be applicable to the flood flow in actual rivers.