The Temperature Evaluation of the Buried Hill Geothermal Reservoirs in the Jizhong Depression, Bohai Bay Basin, China

Table 2

Geochemical characteristics of geothermal water in the buried hill of the study area.

Group	TDS (g/L)	Hydrochemical type		Main cation and anion (percentage of meq)	Ionic ratio ()
		Surin classification	Shu kraft classification
I	<5		Cl·-Na	(52%); (37%); (83%)
II	5~20	and	Cl-Na	(92%); (90%)
III	>20		Cl-Na·Ca	(89%); (58%); (30%)