what is river pattern? name 4 patterns formed by rivers
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There are many different drainage patterns that rivers and/or streams follow. The following lists some of the most common:Dendritic—This type of river or stream forms a spreading, treelike pattern, usually in horizontal sediments or in crystalline rocks. Some examples include rivers and streams in the Great Plains and along the Appalachian Plateau.Rectangular—These rivers and streams form a compact, perpendicular network of channels, usually with the channels predominantly lying in two directions. Examples include rivers that go through joints or faults, such as those in the Adirondack Mountains and Zion National Park.Pinnate—These rivers and streams are featherlike, closely grouped, and with short tributaries. They usually occur in areas containing easily eroded material, such as those found in parts of the Colorado Plateau.Trellis—Trellis drainage patterns have one dominant direction, with secondary streams perpendicular to the main river. Trellises closely resemble rectangular drainage patterns, but are more elongated (along the main river) and less compact. Examples of this type of pattern occur in tilted or faulted sediments, such as those in the European Alps, and along elongated landforms, such as hill-sized, teardrop-shaped deposits called drumlins, which are formed by retreating glaciers.Radial—Radial drainage patterns are just what their name implies: rivers or streams radiating from a central point. Examples include rivers and streams on volcanic cones or domes, including such places as Koko Crater, Hawaii, and the Paricutin volcano in Mexico.Parallel—Parallel drainage has many channels that are regularly spaced and parallel to each other. Examples are found in steeply sloping surfaces, such as those found in Mesa Verde National Park.some of this may help u :)
there are 4 types of drainage patterns on the basis of their flowing pattern-dendritic, trellis, radial and rectangular.
dendritic-this pattern resembles branches of trees. ex, the indo-gangetic plains.
trellis-in this pattern tributaries join the main rivers at right angles. ex, the old folded mountains of chotanagpur plateau.
radial-in this pattern, tributaries originate from a central high peak. ex, rivers like narmada, son, mahanadi originate in the amarkanthak range.
rectangular-it joins main rivers at right angles and juncution, differs from trellis as it is far more irregular and its streams are neither long nor parallel as in trellis. ex, pattern found in the vindhyan mountains of india.
i hope my answer is helpful to you...
Drainage pattern means spatial arrangement and form of drainage system in terms of different rock types, geological structure, climatic conditions and denudational history.
1.Trellis Pattern: in this system the tributaries can be seen meeting the main stream at right angles. This exists where hard and soft rocks exist parallel to each other.
2.Dendritic Patterns (Tree shaped pattern):is the most common and widespread pattern to be found on the earths surface. In this pattern, the tributaries come from all directions to meet the main river. Like the branches of a tree the small streams meet larger streams and the larger streams meet the much larger streams, in the end they meet the river. This develops where the river channel follows the slope of the terrain.
3.Parallel Drainage Patterns:comprises numerous rivers which are parallel to each other and follow the regional slope. This pattern is developed on uniformly sloping areas such as coastal plains.
4.Radial Drainage Pattern/Centrifugal Pattern:develops where streams flow in different directions from a central peak or dome like structure. Streams which diverge from a central higher point in all directions.