The localized effect underground longwall mining has on surface water flow was evalauted using a combination of data gathering and displaying tools, speecifically Global Positioning System (GPS) and Geographic Information System (GIS) applications. GPS was used to locate monitoring points in streams and springs and to attach site specific attributes to each location. GIS was used to combine and display the data with various surface and mine maps. Applying GPS to the study of mine subsidence allows collection of large amounts of data in the field that can be combined and collectively presented in a GIS format. The ten-month study included studying a perennial stream, its tributary and seven springs above two longwall panels. The reuslts of the study showed that, directly after mining, flow in the stream tributary was significantly reduced (95
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