Table 6.

Evaluation results of ten treatments of irrigation and drainage by changing two parameters of α, p.

Years	Treatments	Level eigenvalue				Stability range
		α = 1, p = 1	α = 1, p = 2	α = 2, p = 1	α = 2, p = 2
2011	T1	4.596	4.511	4.807	4.753	4.511~4.807
	T2	2.95	2.828	2.66	2.561	2.561~2.950
	T3	2.753	2.806	2.401	2.581	2.401~2.806
	T4	3.643	3.571	3.58	3.507	3.507~3.643
	T5	3.283	3.405	3.163	3.412	3.163~3.412
2012	T1	4.596	4.511	4.807	4.753	4.511~4.807
	T2	2.95	2.828	2.66	2.561	2.561~2.950
	T3	2.753	2.806	2.401	2.581	2.401~2.806
	T4	3.643	3.571	3.58	3.507	3.507~3.643
	T5	3.283	3.405	3.163	3.412	3.163~3.412

Note: α is the failure criterion parameter of model optimization and p is the distance parameter.