Question

explains different types of drainage patterns

Answer 1

Drainage patterns are classified on the basis of their form and texture. Read on to learn some common types of drainage patterns, such as: dendritic, deranged, centripetal and trellised.

Below are 4 common types of drainage patterns:

Dendritic

A dendritic drainage pattern is the most common form and looks like the branching pattern of tree roots. It develops in regions underlain by homogeneous material. That is, the subsurface geology has a similar resistance to weathering so there is no apparent control over the direction the tributaries take. Tributaries joining a larger stream at acute angle (less than 90 degrees). 

Deranged

Drainage patterns are found in areas recently disturbed by events like glacial activity or volcanic deposition. Over time, the stream will adjust the topography of such regions by transporting sediment to improve flow and channel pattern. 

Centripetal

The centripetal drainage pattern is just the opposite of the radial as streams flow toward a central depression. This pattern is typical in the western and southwestern portions of the United States where basins exhibit interior drainage. During wetter portions of the year, these streams feed ephemeral lakes, which evaporate away during dry periods. Salt flats are created in these dry lake beds as salt dissolved in the lake water precipitates out of solution and is left behind when the water evaporates away. 

Trellised

It is a rectangular shaped drainage pattern that develops where bands of rocks vary in resistance. In some areas there are alternate bands of hard and soft rocks. The flowing water can erode the soft rocks and thus flows along the bands of soft rock. Many such water channels form a trellis. The streams (called subsequent rivers) cut out the valleys (called vales) and join the main river (called Consequent River) at right angles. The main river, by sheer force, cuts the hard rock and flows down the slope forming an escarpment and thus a river gap is created. 

this is for 5 marks question above..



OR The answer is of 3 marks the answer is below.

The drainage patterns are divided into the following ten types:
1. Trellised Drainage Pattern
2. Dendritic Drainage Pattern
3. Rectangular Drainage Pattern
4. Radial Drainage Pattern
5. Centripetal Drainage Pattern
6. Annular Drainage Pattern
7. Barbed Drainage Pattern
8. Pinnate Drainage Pattern
9. Herringbone Drainage Pattern
10. Parallel Drainage Pattern.

Answer 2

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➟ The different types of drainage pattern are :-

➝ Trellis Drainage pattern : This pattern is formed by the network of tributaries and distributaries that follow the regional slope of the land and are adjusted by the nature of underlying rocks.

➝ Dendritic Drainage pattern : This tree shaped drainage pattern is commonly found in the mountains and hilly areas and on extensive plateau surface like in the deccan plateau.It is most extensive in the basin of Krishna,kaveri,Mahanadi and Godavari river.

➝ Radial Drainage pattern : In this pattern,the river tend to flow from a central higher points in all directions like the spokes of a cycle wheel.For Example the Hazaribagh plateau of Jharkhand have given birth to the radial drainage pattern.

➝ Rectangular Drainage pattern : The rectangular drainage pattern develops on strongly joined rock.It is associated with inland drainage usually found in the arid area likes these of western rajasthan.

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