Stream Drainage

Dendritic Drainage
most common and looks similar to a tree. Dendritic Drainage occurs where a region is above a single type of bedrock (homogeneous). Which gives the entire area a similar resistance to erosion and therefore a seemingly random placement of tributaries. Most tributaries will join a larger stream at an acute angle.
Parallel Drainage
generally forms where there is a large hill. They develop in areas with parallel regions of rock that are harder to erode
Trellis Drainage Patterns
form where there is a folded topography, like the Appalachian mountains. Tributaries enter the main stream at near right angles.
Rectangular drainage patterns
found in regions that have undergone faulting. Streams follow the path of least resistance and thus are concentrated in places were exposed rock is the weakest.
Radial drainage pattern
develop around a central elevated point. These patterns are common to such conically shaped features as volcanoes
Centripetal drainage patterns
opposite of radial ones. They are common in basins like in the United States Southwest region, where streams flow downward to a central point.