Coupling Empowerment Based Application of Extension Method for Geothermal Potential Assessment

Table 2

Dimensionless quantization and standardized index level for impact factors.

Impact factors	Index level			Standardized index level
	High	Medium	Low	High	Medium	Low
Formation and lithology	3~4	2~3	1~2	0.67~1.00	0.33~0.60	0.00~0.33
Structure characteristics	3.6~4.1	2.6~3.6	1.0~2.6	0.84~1.00	0.52~0.84	0.00~0.55
Volcanic activity	3.6~4.1	2.6~3.6	1.0~2.6	0.84~1.00	0.52~0.84	0.00~0.52
Water chemical characteristics	3.6~4.1	2.6~3.6	1.0~2.6	0.84~1.00	0.52~0.84	0.00~0.52
Geothermal gradient	3~4	2~3	1~2	0.84~1.00	0.52~0.84	0.00~0.52
Earthquake activity	0.8~1.0	0.4~0.8	0.0~0.4	0.80~1.00	0.40~0.80	0.00~0.40
Hot spring temperature	80~100	50~80	0.0~50	0.80~1.00	0.00~0.40	0.00~0.50