Environmental Risk Assessment System for Phosphogypsum Tailing Dams

Table 8

Scale of relative importance used in the pairwise comparison of AHP for 4-level factors.

(a)

	C1	C2	C3
C1	(1,1,1,1)	(1/4,2/7,2/5,1/2)	(1/7,2/13,2/11,1/5)
C2	(2,5/2,7/2,4)	(1,1,1,1)	(1/3,1/3,1/2,1/2)
C3	(5,11/2,13/2,7)	(2,2,3,3)	(1,1,1,1)

(b)

	C4	C5	C6	C7
C4	(1,1,1,1)	(1,3/2,5/2,3)	(1/6,2/11,2/9,1/4)	(1/5,2/9,2/7,1/3)
C5	(1/3,2/5,2/3,1)	(1,1,1,1)	(1/7,2/13,2/11,1/5)	(1/6,2/11,2/9,1/4)
C6	(4,9/2,11/2,6)	(5,11/2,13/2,7)	(1,1,1,1)	(1,1,2,2)
C7	(3,7/2,9/2,5)	(4,9/2,11/2,6)	(1/2,1/2,1,1)	(1,1,1,1)

(c)

	C8	C9	C10	C11	C12
C8	(1,1,1,1)	(1/6,2/11,2/9,1/4)	(1/8,2/15,2/13,1/6)	(1/6,2/11,2/9,1/4)	(1/3,2/5,2/3,1)
C9	(4,9/2,11/2,6)	(1,1,1,1)	(1/3,2/5,2/3,1)	(1,1,1,1)	(2,5/2,7/2,4)
C10	(6,13/2,15/2,8)	(1,3/2,5/2,3)	(1,1,1,1)	(1,3/2,5/2,3)	(5,11/2,13/2,7)
C11	(4,9/2,11/2,6)	(1,1,1,1)	(1/3,2/5,2/3,1)	(1,1,1,1)	(2,5/2,7/2,4)
C12	(1,3/2,5/2,3)	(1/4,2/7,2/5,1/2)	(1/7,2/13,2/11,1/5)	(1/4,2/7,2/5,1/2)	(1,1,1,1)

(d)

	C13	C14	C15	C16	C17	C18
C13	(1,1,1,1)	(5,11/2,13/2,7)	(4,9/2,11/2,6)	(4,9/2,11/2,6)	(4,9/2,11/2,6)	(1/4,2/7,2/5,1/2)
C14	(1/7,2/13,2/11,1/5)	(1,1,1,1)	(1/4,2/7,2/5,1/2)	(1/4,2/7,2/5,1/2)	(1/4,2/7,2/5,1/2)	(1/9,2/17,2/15,1/7)
C15	(1/6,2/11,2/9,1/4)	(2,5/2,7/2,4)	(1,1,1,1)	(1,1,1,1)	(1,1,1,1)	(1/7,2/13,2/11,1/5)
C16	(1/6,2/11,2/9,1/4)	(2,5/2,7/2,4)	(1,1,1,1)	(1,1,1,1)	(1,1,1,1)	(1/7,2/13,2/11,1/5)
C17	(1/6,2/11,2/9,1/4)	(2,5/2,7/2,4)	(1,1,1,1)	(1,1,1,1)	(1,1,1,1)	(1/7,2/13,2/11,1/5)
C18	(2,5/2,7/2,4)	(7,15/2,17/2,9)	(5,11/2,13/2,7)	(5,11/2,13/2,7)	(5,11/2,13/2,7)	(1,1,1,1)

(e)

	C19	C20	C21	C22	C23	C24
C19	(1,1,1,1)	(4,9/2,11/2,6)	(2,5/2,7/2,4)	(4,9/2,11/2,6)	(4,9/2,11/2,6)	(2,5/2,7/2,4)
C20	(1/6,2/11,2/9,1/4)	(1,1,1,1)	(1/4,2/7,2/5,1/2)	(1,1,1,1)	(1,1,1,1)	(1/4,2/7,2/5,1/2)
C21	(1/4,2/7,2/5,1/2)	(2,5/2,7/2,4)	(1,1,1,1)	(2,5/2,7/2,4)	(2,5/2,7/2,4)	(1,1,1,1)
C22	(1/6,2/11,2/9,1/4)	(1,1,1,1)	(1/4,2/7,2/5,1/2)	(1,1,1,1)	(1,1,1,1)	(1/4,2/7,2/5,1/2)
C23	(1/6,2/11,2/9,1/4)	(1,1,1,1)	(1/4,2/7,2/5,1/2)	(1,1,1,1)	(1,1,1,1)	(1/4,2/7,2/5,1/2)
C24	(1/4,2/7,2/5,1/2)	(2,5/2,7/2,4)	(1,1,1,1)	(2,5/2,7/2,4)	(2,5/2,7/2,4)	(1,1,1,1)

(f)

	C25	C26	C27
C25	(1,1,1,1)	(1,1,1,1)	(1,3/2,5/2,3)
C26	(1,1,1,1)	(1,1,1,1)	(1,3/2,5/2,3)
C27	(1/3,2/5,2/3,1)	(1/3,2/5,2/3,1)	(1,1,1,1)

(g)

	C28	C29
C28	(1,1,1,1)	(1,1,1,1)
C29	(1,1,1,1)	(1,1,1,1)

(h)

	C30	C31	C32	C33
C30	(1,1,1,1)	(1/4,2/7,2/5,1/2)	(1/5,2/9,2/7,1/3)	(1/6,2/11,2/9,1/4)
C31	(2,5/2,7/2,4)	(1,1,1,1)	(1/3,2/5,2/3,1)	(1/4,2/7,2/5,1/2)
C32	(3,7/2,9/2,5)	(1,3/2,5/2,3)	(1,1,1,1)	(1/3,2/5,2/3,1)
C33	(4,9/2,11/2,6)	(2,5/2,7/2,4)	(1,3/2,5/2,3)	(1,1,1,1)

(i)

	C34	C35
C34	(1,1,1,1)	(1/4,2/7,2/5,1/2)
C35	(2,5/2,7/2,4)	(1,1,1,1)