Abstract
Field measurements of turbulent velocity were carried out in rivers and channelswith electromagnetic anemometers. A set of two probes of the instruments could detect the three components of flow velocity simultaneously, and thus the turbulent characteristics of flows which were almost one order larger in scale than laboratory flumes could be measured. The following flows were investigated:(1) uniform flows:(a) with sufficient submergence, (b) with small relative submergence, (c) over vegetated bed;(2) flow with abrupt change of bed roughness; and (3) flow in a stream with vegetated region (transverse velocity profile was discussed). The obtained data are compared with those previously obtained in the laboratories, and discussed.
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