Permeability, Aquitards, and Aquifers
Porosity alone cannot measure a material’s capacity to yield groundwater. Rock or sediment may be very porous yet still not allow water to move through […]
Hydrology
Distribution of Groundwater
Some of the water that soaks in does not travel far because it is held by molecular attraction as a surface film on soil particles. […]
Formation of a Water Gap
To fully understand the drainage pattern displayed by a stream, it is often useful to consider a stream’s entire history. For example, river valleys occasionally […]