Geography River Drainage

In geomorphologic terms, 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 the land, whether a particular region is dominated by hard or soft rocks and the gradient of the land. Geomorphologists and hydrologists often view streams as being part of drainage basins. A drainage basin is a topographic region from which a stream receives runoff, throughflow, and groundwater flow. The number, size, and shape of the drainage basins found in an area vary and the larger the topographic map, the more information on the drainage basin is available. According to the configuration of the channels, drainage systems can fall into one of several categories known as drainage patterns. Drainage patterns depend on the topography and geology of the land.
A drainage system is described as accordant if its pattern correlates to the structure and relief of the landscape over which it flows.
Dendritic drainage systems (from Greek δενδρίτης, dendrites, ""of or parallel to a tree"") are not straight and are the most common form of the drainage system. In a dendritic system, there are many contributing streams (analogous to the twigs of a tree), which are then joined together into the tributaries of the main river (the branches and the trunk of the tree, respectively). They develop where the river channel follows the slope of the terrain. Dendritic systems form in V-shaped valleys; as a result, the rock types must be impervious and non-porous.
This chapter of Geography, River: Drainage Patterns can be studied using study material for ICSE for Class 10 Geography at Extramarks. Get ICSE Class 10 study material for free covering online study material for ICSE Class 10 Geography. Visit Extramarks website for online study materials for ICSE Class 10. Extramarks also provides CBSE syllabus for Class 10 and other academic resources for students, irrespective of board or class.