Hydrologic characteristics of a surface mine spoil aquifer.
Proceedings or the 2nd International Conference on Abatement of Acidic Drainage Quebec Canada. 1:47-68
Aquifer tests of surface coal mine spoil indicate that two distinctly different groundwater hydrologic characteristics exist. Aquifer pumping and slug tests indicate the presence of discrete conduits within the spoil. Groundwater flow within conduits is pseudokarst, and flow between conduits is porous media. Under transient or stress conditions, pseudokarst groundwater flow in the spoil becomes prominent, while under steady-state conditions porous media flow dominates. Tracer testing indicates the average linear velocity of groundwater through the spoil is close to pure porous media and significantly lower than true karst flow. Physical observations substantiate the existence of conduits and their degree of influence under different hydrologic conditions.
Proceedings of the 2nd International Conference on Abatement of Acidic Drainage, Quebec, Canada