Drainage patterns are classified on the basis of their form and texture. Several streams develop on both the flanks of the ridges and join the longitudinal synclinal streams at right angle. The extensive plateau surfaces of the Panna plateau, Bhander plateau and Rewa plateau M. The streams converge in an area which is either a depression or a basin. A typical example of this drainage pattern is found is the Vindhyan Mountains of India. Vegetables, grains, and grasses are grown on drained lands.
Dendritic drainage: the , Tibet, seen from space: snow cover has melted in the valley system. 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. The rocks are weathered and eroded along the interfaces of joints, fractures and faults and thus surface runoff collects in such long and narrow clefts resulting from the weathering and erosion of joints and forms numerous small rills. It differs from the trellis pattern in so far as it is more irregular and its tributary streams are neither as long, nor parallel as in trellis drainage. If we take the entire drainage network of Sri Lanka, it exhibits the best example of radial drainage pattern at macro-level.
Laura and Jay always paint … in the evening and sometime write. There are a few other drainage patterns as well, which are uncommon. And there can be loose or crushed rock on the ground that will let water go right through it, or there can be sand, which can pass water fairly well, or there will be some kind of soil, which holds water to a varying degree. Due to the northward slope of the Peninsula towards the Great Plains, the rivers originating from the Vindhyan and the Satpura ranges flow northward into the Ganga system. Lack of knowledge will not stop me; I will learn. Additionally, the problem is a 3-dimensional one, and a cross section of the subsurface features over the area of interest will have to be plotted. Other geological features on which radial drainage commonly develops are domes and laccoliths.
Barbed Drainage Pattern : Barbed drainage pattern, a rare kind of drainage pattern, is formed when the tributaries flow in opposite direction to their master streams. Proximity The simplest method of making objects appear to belong together is to group them closely together. Continuation A much more subtle method of unifying a work involves the continuation of line, edge or direction from one area to another. Drainage patterns depend on the and of the land. These streams resemble the spokes of a wheel or the radii of a circle.
The three main types of drainage patterns that can be identified are dendritic, trellised and radial. All forms of transitions can occur between parallel, dendritic, and trellis patterns. The tributaries originating from the steep sides of parallel ridges join the longtitudinal master consequent occupying the valley at acute angles fig. Consequent Rivers The Rivers which follow the general direction of slope are known as the consequent rivers. The pattern is called dendritic on the ground that the network of tributaries of various orders and magnitudes of the trunk or master stream resembles the branches and roots and rootlets of a tree.
The Indus, Satluj, Ganga, Sarju Kali , Arun a tributary of Kosi , Tista and Brahmaputra are some of the important antecedent rivers, originating from beyond the Greater Himalayas. Dendritic Drainage A pattern of drainage which is branching, ramifying or dichotomising, thereby giving the appearance of a tree. In both systems, the main conducting and protective channels are open. In fact, the trellised and rectangular patterns are differentiated on the basis of spacing between the streams. 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 hardness, as in the Red Valley, which nearly encircles the domal structure of the Black Hills of South Dakota. If the streams are closely spaced the resultant pattern becomes trellised while rectangular pattern is formed when the streams are widely spaced. In India the range shows the best example of radial drainage pattern.
They are governed by the topography of the land, whether a particular region is dominated by hard or soft rocks, and the gradient of the land. During the last , the was scraped off, leaving mostly bare rock. On these features the drainage may exhibit a combination of radial patterns A good example of a radial drainage pattern is provided by the rivers originating from the Amarkantak Mountain. The term herringbone has been derived from the pattern of bones of herring fish mainly spine bones. These tributaries enter the main river at approximately 90 degree angle, causing a trellis-like appearance of the drainage system. The classic example is the Canadian Shield. They are governed by the topography of the land, whether a particular region is dominated by hard or soft rocks, and the gradient of the land.
The tributaries join their master streams in a hook-shaped bend. Dendritic looks like tree branches, with the river being thetrunk and the tributary streams being the branches. This pattern is typical in the western and southwestern portions of the United States where basins exhibit interior drainage. The stream pattern is thus superposed on, or placed on structural features that were previously buried. The water relief system is an essential part of the drainage system, and it is usually a river or reservoir that can accept the excess water from the drainage network without backing up. Four main types of stream drainage patterns are Dendritic, Radial,Rectangular, and Trellis.
There are ways to build in subterrainean drainage features, too. Tributaries joining a larger stream at acute angle less than 90 degrees. In the open system, open channels are used as the regulating network, whereas in the closed system, the regulating network is made up of closed collectors and has underground drains and small channels. It happens in areas where there has been much geological disruption. The longitudinal consequent streams, as master streams, are developed in the longitudinal parallel valleys while tributaries, as lateral consequents, after originating from the hillslopes of the bordering parallel ridges join the longitudinal consequents almost at right angle. 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. The Chambal, Sind, Ken, Betwa, Tons and Son meet the Yamuna and the Ganga at right angles.