Calculating supply amount of karst underground water in spring valley by synthetic permeance coefficieint method is introduced.The question of error in observing all area balanced calculation in Fengfeng mine area is expouned.

• 应用综合渗入系数法进行泉域岩溶地下水补给计算，解决了峰峰矿区用小流域观测全区均衡计算过程中误差较大的问题。