Annular pattern, also known as ‘circular pat­tern’ is formed when the tributaries of the master consequent streams are developed in the form of a circle. Such pattern (fig. 17.12) is developed over a mature and dissected dome mountain characterised by a series of alternate bands of hard and soft rock beds.

In geomorphology, drainage systems, also known as river systems, are the patterns formed by the streams, rivers, and lakes in a particular drainage basin. They are governed by the topography of land, whether a particular region is dominated by hard or soft rocks, and the gradient of the land.

2004年10月1日 · Most river patterns evolve through natural selection. Slope induces the formation of such patterns as parallel, radial and distributary, while structure produces straight, angular, trellis and annular arrangements. Once established, patterns tend to persist.

Annular Drainage Pattern-When the upland has an outer soft stratum, the radial streams develop subsequent tributaries which try to follow a circular drainage around the summit. It is best displayed by streams draining a maturely dissected structural dome or basin where erosion has exposed rimming sedimentary strata of greatly varying degrees of ...

Most river patterns evolve through natural selection. Slope induces the formation of such patterns as parallel, radial and distributary, while structure produces straight, angular, trellis and annular arrangements. Once established, patterns tend to persist.

2014年1月1日 · Drainage pattern refers to the pattern of the entire river network and should not be confused with channel pattern or form, which refers to limited reaches of channels or channel systems with more or less uniform morphological characteristics. Drainage basin morphometry can be quantified by several parameters, including:

Answer: Annular drainage patterns form around structural domes, volcanic craters, or folded terrains, where streams flow in concentric circles due to differential erosion along rock bands. This pattern highlights geological structures and provides insight into past uplift, erosion, and structural deformation processes.

2023年10月6日 · Annular Pattern This pattern , also known as circular pattern, is formed over a mature & directed dome characterized by a series of alternate bunds of hard and soft rocks, guiding the tributaries to take a circular path or a ringlike pattern with a concentric path.

2024年2月3日 · This pattern develops when the main river is captured and changes its flow direction, while the tributaries continue to point in the previous flow direction. An intriguing example of a barbed drainage system is the Arun River in Nepal, a tributary of the Kosi. Annular Drainage Pattern. The radial streams develop further tributaries.

Annular Drainage Pattern-When the upland has an outer soft stratum, the radial streams develop subsequent tributaries which try to follow a circular drainage around the summit. Though these are uncommon drainage pattern in India but Pithoragarh (Uttarakhand), Nilgiri Hills in Tamil Nadu and Kerala are a few example of such drainage pattern.