Answer the following questions in about 150 words.
(i) Running water is by far the most dominating geomorphic agent in shaping
the earth’s surface in humid as well as in arid climates. Explain.
Answers
Answer:
In humid areas which receive heavy rainfalls, running water is considered as the most geomorphic agents in bringing about the degradation of the land surface. There are two components of running water:- One is overflow on general surface as streams and river in valleys. Most of the erosional landforms made by running water are associated with vigorous and youthful rivers flowing over the steep gradients. With time, stream channels over stream gradients turn gentler due to continued erosion and as a consequence, lose their velocity facilitating active deposition. There may be depositional forms associated with streams flowing over steep slopes.When the stream beds turn gentler due to continued erosion, downward cutting becomes less dominant and lateral erosion of banks increases as a consequence hills and valleys are reduced to plains.
In arid regions, the rain is scare but when it comes heavily, the rocks devoid of any vegetation get eroded much faster and the rains help in removing the weathered materials easily. So running water is by far the most dominating geomorphic agent.
Running water is by far the most dominating geomorphic agent in shaping the earth’s surface in humid as well as in arid climates due to the following reasons :
- So basically in humid areas there is a significant overflow which is in the form of sheets on the normal surface of the lands.
- Another aspect is the linear flow which is seen to be taken place in the streams and also it can be seen as rivers in the valleys.
- In the middle stages there is the production of landforms such as natural leeves , river terrace , flood plains etc.
- Meanwhile the final terminating stages Delta's are significantly made by the running waters.
- One of the most renowned valley, i.e , U-Shaped valley is always formed due to the sweeping of running water.
- The most important material found in. the desert ,i.e, debris is also washed away by the running water and not only due to winds.
- Running water is one of most prominent aspects of the environment which can sweep of weathered material very easily due to it's dominant nature.