Flooding - Drainage Patterns Flashcards
what are the different types of drainage patterns?
- Dendritic
- Parallel
- Trellis
- Rectangular
- Radial
- Annular
- Multibasinal
- Contorted
is it the most commonly formed on horizontally or slightly dipping beds and uniform sediments or on uniformly resistant crystalline rocks
dendritic
t or f: in dendritic drainage pattern, the subsurface geology has a similar resistance to weathering so there is no apparent control over the direction the tributaries take
t
dendritic pattern have tributaries joining larger streams at what angle?
acute (<90 degrees)
this drainage pattern is the most common form and looks like the branching pattern of tree roots.
dendritic drainage
this drainage pattern is the most common form and looks like the branching pattern of tree roots.
dendritic drainage
Usually develops on moderate to steep slopes,
but also where regional structure, such as
outcropping resistant rock bands, are
elongated and parallel. All forms of transition
can occur this type and dendritic and trellis
pattern.
Parallel
parallel drainage pattern develop on what slopes?
moderate to steep slopes
this type of drainage pattern could be a manifestation of rigid structures or faults
parallel
Because of the steep slopes, the streams are swift and straight, this drainage pattern have very few tributaries, and all flow in the same direction.
Parallel
sometimes indicates the presence of a major fault that cuts across an area of steeply folded bedrock
Parallel
Patterns most commonly on dipping or folded
sedimentary or weakly metamorphosed
sedimentary rocks; also areas of joints and
faults which intersect with right angles and old
sand dunes with parallel alignment
Trellis
what is the drainage pattern of the Appalachian Mountains of North America?
Trellis
Usually have a more or less
perpendicular turns mainly
caused by criss crossing
fractures.
Rectangular
Occurs around domes or cones, and
particularly common on volcanic areas.
Radial
