How Topography Affects Groundwater Flow: A GIS Perspective From a GIS perspective, topography is usually represented using Digital Elevation Models, commonly known as DEMs. These datasets capture elevation values across a landscape, allowing us to visualize and analyze slopes, aspects, flow paths, and drainage patterns. DEMs form the foundation for many groundwater-related studies because they provide a continuous picture of how elevation changes across space. Once elevation is known, GIS can de
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