The groundwater mainly concentrates in Karstic fractures of limestone in middle Ordovician. At the runoff and drainage area, the specific well discharge of well hole is usually more than 1000 m3/d.

• 地下水主要集中于中奥陶系石灰岩的岩溶裂隙中；在径流及排泄区；井孔单位涌水量一般大于1000m3/d.