IGNOU MGGE 4 2026 - Describe the drainage basin. Elaborate any five drainage pat

Question

Describe the drainage basin. Elaborate any five drainage patterns with diagrams.

28 Jan 2026

Answer :

Word Count : 480

A drainage basin is a fundamental hydrological unit that refers to the entire land area from which surface runoff, groundwater flow, and precipitation drain into a common outlet such as a river, lake, or sea. It is bounded by topographic divides known as watersheds, which separate one basin from another. Within a drainage basin, water moves through an interconnected system comprising the main river, its tributaries, channels, slopes, soil, vegetation, and underlying geological formations. The characteristics of a drainage basin, such as size, shape, slope, climate, soil type, and land use, strongly influence runoff, infiltration, erosion, sediment transport, and overall water availability, making the concept central to hydrology and water resources management. The arrangement of streams and rivers within a basin forms distinct drainage patterns, which develop primarily due to variations in geology, structure, slope, and stage of landscape evolution. One of the most

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