抄録
We examined the characteristics of scour at the propagation grounds developed using sand-tube for Japanese Littleneck Clam Ruditapes philippinarum under oscillatory or steady flow by hydraulicmodel test. The changes of maximum scour depth around concave sections and scour width in the grounds were expressed by KC-number under oscillatory flow and by Froude number under steady flow. To control disappearance of fishing grounds because of local score, KC-number and Froude number need to be under 11.7 and 0.73.
