what are the functions of river in class 9 chapter 3 drainage
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Answer:
Rivers are the most obvious and significant feature of the landscape. They transport water by gravity, from headwaters to ocean. The natural process is relentless, closing the hydrologic cycle by returning river runoff to the sea. For surface water, the cycle lasts an average of eleven days; that is, globally, the entire amount of surface water is replaced every eleven days. Rivers provide a source of fresh water that is completely replenishable within a short timeframe. Through the ages, rivers have been used as sources of fresh water, satisfying the ever increasing thirst of societies, both ancient and contemporary, for the precious liquid.
Answer:
In geomorphology, drainage systems, also known as river systems, are the patterns formed by the streams, rivers, and lakes in a particular drainage basin. ... A drainage basin is the topographic region from which a stream receives runoff, throughflow, and groundwater flow.