Drainage patterns are the shapes that channels and streams take on the surface of the land. These patterns are determined by the topography of the land, the rock type, and the amount of precipitation that falls in an area. There are several types of drainage patterns that can occur, including dendritic, radial, trellis, rectangular, and annular.
A dendritic drainage pattern is one of the most common types of patterns and is characterized by a tree-like shape. It occurs when streams and channels form in a network that branches out from a central point, much like the branches of a tree. This type of pattern is often found in areas with relatively flat topography and is common in sedimentary rock formations.
A radial drainage pattern occurs when streams and channels radiate outward from a central point, much like the spokes of a wheel. This type of pattern is often found in mountainous areas where the topography is steep. It is also common in areas with volcanic rock formations.
A trellis drainage pattern is characterized by a series of parallel channels that are separated by ridges. This type of pattern is often found in areas with alternating layers of hard and soft rock. The channels follow the softer rock layers, while the ridges form along the harder layers.
A rectangular drainage pattern is characterized by a series of channels that are perpendicular to one another and form a rectangular pattern. This type of pattern is often found in areas with a uniform rock type and a relatively flat topography.
An annular drainage pattern is characterized by a series of channels that form a circular pattern around a central point. This type of pattern is often found in areas with a uniform rock type and a relatively flat topography.
In conclusion, drainage patterns are the shapes that channels and streams take on the surface of the land. These patterns are determined by the topography of the land, the rock type, and the amount of precipitation that falls in an area. There are several types of drainage patterns, including dendritic, radial, trellis, rectangular, and annular. Understanding drainage patterns is important for a variety of purposes, including predicting the potential for flooding, managing water resources, and designing infrastructure such as roads and buildings.
Definition of Drainage webapi.bu.edu
Oligotrophic conditions increase between 2,600 and 2,480yr BP. Several ideas were proposed and reviewed by Fagherazzi and Mariotti 2012 , but none of them are conclusive. The surface has minimal topography and a combination of bedding planes, faults, or fractures that forms a rectangular pattern. Network density could also be affected by anthropic actions such as ditching. Here, the resistant bedrock ridges get drained by the shorter stream, and the non-resistant units form valleys with the subsequent streams. To define drama in simple terms, it simply means stories being brought to life by actors and events on a stage.
Drainage Patterns
Vedantu provides extensive study material on not only trellis drainage patterns but also various other types of drainage patterns and it has study notes on drainage systems as well. What are the 5 features of drama? This situation arises when water on the wetland moves as overmarsh flow most of the time rather than in channelized flow. Definition of radial drainage pattern A drainage pattern in which consequent streams radiate or diverge outward, like the spokes of a wheel, from a high central area; it is best developed on the slopes of a young, unbreached domal structure or of a volcanic cone. Between 4,400 and 2,600yr BP, declining level is indicated by a lessening of these planktonic species, however between 3,900 and 3,200yr BP, a high diatom content indicates a positive oscillation and a trend to oligotrophic conditions. The study material is available in PDF format and can be downloaded for free. The plotted points lie on, or close to, straight lines. The classic example is the Canadian Shield.
Drainage pattern Definition
It is formed where there is a slope. These tributaries also intersect at right angles where the water gap cuts through some more complex formations. Despite a general orientation subparallel to longitudinal flow lines of the glacier, tunnel channel drainage patterns are highly variable, including predominantly single isolated straight channels, braided networks, dendritic networks, radial, subparallel channels Fig. The discordant drainage pattern follows the initial slope and is unaffected by the alterations in the path. The same heavy rainfall in zones occupied by sandy soil will not cause significant flooding since rapid infiltration of rainfall reduces the likelihood of generation of high volume of surface run-off. Various forms of weathering on the joint systems or faults in any bedrock localize the streamflow, leading to the production of a Rectangular pattern.
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That is, the subsurface geology has a similar resistance to weathering, so there is no apparent control over the direction the tributaries take. The radical pattern develops when streams flow in different directions from a central peak or dome like structure. Further south, because of the steepness of the Western Ghats flanks on either side, the rivers Noyil and Vaigai flow eastward, whereas the Ponnani, Periyar, Pamba, and Achankovil flow westward to discharge sediments into the Arabian Sea Soman, 1997; Valdiya, 2010. Where are rectangular drainage patterns found in Canada? A drainage pattern can be well briefed concerning the topological features from where a stream gets runoff through its flow and the groundwater flow. In order to get a better understanding of the drainage patterns, refer to the study material provided by Vedantu, it is easily accessible and can be downloaded for free.