Evaluation of the Water Yield of Coal Roof Aquifers Based on the FDAHP-Entropy Method: A Case Study in the Donghuantuo Coal Mine, China

Table 7

Specified and revised classification standard for the water yield.

	Specified level	Specified (L·s^-1·m^-1)		Partition code	Revised level	Revised (L·s^-1·m^-1)	(m^3·min^-1)
Specified classification standard	Weak		Revised classification standard	Zone I	Poor
	Medium			Zone II	Medium
	Rich			Zone III	Rich
				Zone IV	Richer
	Extremely rich			—	—	—	—