3枚網および2枚網の網高さの推定〔英文〕

概要

論文の詳細を見る
Matuda's approximate formula for predicting the floatline height of gillnet was modified in estimating the floatline height of trammel net and semi-trammel net. The estimated values were compared with the actual values obtained from a flume tank experiment using a cross-section of actual nets. For trammel net, Matuda's method was applied by modifying the drag coefficient and weight of netting in water. The same modifications were applied to semi-trammel net when the current comes from the direction of the small-meshed net (the net is of a concave shape similar to a trammel net). In the case when the current comes from the direction of large-meshed net of semi-trammel net (the net is of a parabolic shape), the estimated values of the net of concave shape taken from Matuda's modified formula was used to predict the floatline height of the net of parabolic shape through regression estimates. The resulting estimated values were found to be in close agreement with the actual values.
日本水産學會の論文