Table 2.

Summary of Fuzzy standardization for criteria.

Cluster	Criteria	Fuzzy and shape membership functions	Control point/ Value point
Environmental	Surface water	Increasing – Linear	a = 1000 m
			b = 20,000 m
	Ground water	Increasing – Linear	a = 10 m
			b = 300 m
	Land use	user defined	-----
	Distance to Well	Increasing – Linear	a = 40 m
			b = 3000 m
	Landform	user defined	------
	Slope	Reducing - Linear	a = 68°
			b = 20°
	Protected area	Increasing – Linear	a = 1000
			b = 6000
	Fault	Increasing – Linear	b = 40,000
Socio-economical	Residential area	Increasing – Linear	a = 1000
			b = 50,000
	Road	Reducing – J-Shape	a = 1000
			b = 3000
			c = 25,000
	Airport	Increasing – Linear	a = 8000
			b = 10,000
	Village	Increasing – Linear	a = 1000
			b = 50,000
	Infrastructure	Increasing – Linear	a = 500
			b = 80,000
	Historical area	Increasing – Linear	a = 3000
			b = 50,000
	Wind direction	user defined	-------