The action of running water which include streams, rivers, and rainfall, have constantly shape the surface of the surface of earth through erosion and depositional processes. River (or running water) is one of the most active agent of land form development.
The movement of the atmosphere in a direction parallel to the earth surface is wind. Geological work of wind. The earth is surrounded by an envelop of gases called the atmosphere. The movement of the atmosphere in a direction parallel to the earth surface is wind.
During the day, air above the land heats up faster than air over water. Warm air over land expands and rises, and heavier, cooler air rushes in to take its place, creating wind. At night, the winds are reversed because air cools more rapidly over land than it does over water.
In deserts, wind abrasion shapes the rocks and boulders. In areas where strong winds consistently pick up sand and carry it, rocks and boulders in the wind’s path can be impacted by wind abrasion. If the wind blows over low-lying rocks, it will cause them to become flattened on the upwind side.
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Upper course river features include steep-sided V-shaped valleys, interlocking spurs, rapids, waterfalls and gorges. Middle course river features include wider, shallower valleys, meanders, and oxbow lakes. Lower course river features include wide flat-bottomed valleys, floodplains and deltas.
In the upper course, the main work of the river is erosion.
characteristics, discharge, sediment transport,and the bed material.
Rivers carry the particles/ debris formed by weathering and deposit it at another place. The particles that rivers carry are stones, rocks, sand particles etc., which help in erosional process.
Winds erode the lower section of the rock more than the upper part. Therefore, such rocks have a narrower base and a wider top. When the wind blows, it lifts and transports sand from one place to another. When the wind stops blowing the sand falls and gets deposited in a low hill-like structure.
