According to Blight, the percolating water seeps along the lower contour of the hydraulic structure, the length traversed by this water is called ______________________?
According to Blight, the percolating water seeps along the lower contour of the hydraulic structure, the length traversed by this water is called ______________________?
		A. Creep length
B. Seeg length
C. Pig
D. Undermining
