Drainage Basin and Drainage Patterns

Drainage pattern that is common along steep slopes of ridge or hills

• trellis

• dendritic

• radial

• parallel

Develops in mostly glacial regions where no specific pattern can be identified

• superimposed

• dendritic

• deranged

• antecedent

Forms on igneous rocks that have joints and cracks.

• deranged

• rectangular

• centripetal

• parallel

Drainage pattern that flows into a central pan or a low-lying area

• radial

• superimposed

• centripetal

• trellis

Drainage pattern which develops on a dome where streams flow outwards.

• radial/centrifugal

• antecedent

• dendritic

• parallel

Forms on inclined rock layers that are unequally resistant to erosion.

• rectangular

• superimposed

• radial

• trellis

Drainage pattern that develops on rocks that have uniform resistance to erosion and where tributaries join the main river at acute angles.

• trellis

• dendritic

• antecedent

• deranged

Drainage pattern that does not match the geology and topography of the existing landscape

• superimposed

• radial

• dendritic

• centripetal

Area drained by a river and its tributaries

• drainage basin

• river system

• watershed

• river mouth

High-lying area that separates two different drainage basins

• confluence

• river system

• watershed

• interfluve