GEOLOGY

Detailed explanation-1: -Runoff is the part of the water cycle in which the water flows over the land as surface water rather than be absorbed into groundwater or evaporating.

Detailed explanation-2: -Surface runoff travels over the ground surface and through surface channels to leave a catchment area called a drainage basin or watershed. The portion of the surface runoff that flows over the land surface towards the stream channels is called overland flow.

Detailed explanation-3: -It comes from unabsorbed water from rain, snowmelt, irrigation or other sources, comprising a significant element of the water cycle as well as the water supply when it drains into a watershed. Runoff is also a major contributor to the erosion that carves out canyons, gorges and related landforms.

Detailed explanation-4: -The most familiar type of natural runoff is snowmelt. Mountains that cannot absorb water from heavy snowfalls produce runoff that turns into streams, rivers, and lakes. Glaciers, snow, and rain all contribute to this natural runoff. Runoff also occurs naturally as soil is eroded and carried to various bodies of water.

Detailed explanation-5: -surface runoff (water flows above the ground’s surface), interflow runoff (water flows underground just below the land’s surface), and. base flow runoff (water flows deep within the ground’s saturated zone). 26-Aug-2021