Question 6.
They occurs transversely to the wind, so that their horns thin out and become lower in the direction of the wind.

214 High Street, Deltas are found at the mouth of large rivers - for example, the Mississippi. Deltas are depositional landforms found at the mouth of a river where the river meets a body of water with a lower velocity than the river (e.g. Name two landforms in the lower course of a river. Question 8. estuary. When a river spills over the banks onto the floodplain the sudden reduction in competence leads to the largest particles being deposited first. The river channels in the lower course are wider than the upper course.why? River landforms can be divided into upper, middle and lower course features. As the water spreads out over the floodplain sediment is deposited in order of size so that it is the fine silts and clays which are deposited furthest from the channel. The largest, coarsest material is deposited first in horizontal layers (termed topset beds), then medium-sized sediment (foreset beds), and finally the finest material furthest away from the land (bottom-set beds). Question 3. Answer: From the source to its mouth, a river is divided into three main sections – Upper Course, Middle Course and Lower Course. Protruding distributaries line their channels with sand while waves and currents move finer silts and clays into calmer water between the fingers of coarser deposits sometimes forming what is termed a birds-foot delta such as the Mississippi. How To Get SSL Certificate? River . These include steep V-shaped valleys, oxbow lakes and flood plains, respectively. Since there is little vegetation or moisture to bind the loose surface materials, the effects of wind erosion are more pronounced in the desert region. In periods of low discharge deposition will occur in the main channel itself. Answer: Winds move along the desert floors with great speed and the obstructions in their path create turbulence. Name two landforms in the lower course of a river, NAME THE IMPORTANT DESTINATIONS OF FOREIGN TOURISTS IN INDIA, Answer the following questions briefly1. (, If river water is less dense (if it has a relatively warmer temperature or is entering saline water) than the other body of water, a plume of river water extends out from the mouth above a wedge of cold/saline water.Coarse sediment occursclose to the mouth but deposition if finer suspended sediment spreads out further into the sea. A build up of alluvium on the banks of a river can create. It took 6 million years, in fact, for the Colorado River to carve out the Grand Canyon in the U.S. state of Arizona. mention 3 . Land either side of the channel is susceptible to flooding. The windward side is convex and gently-sloping while the leeward side (being sheltered) is concave and steep. What do you understand by wat5.

When a flood occurs the river water spreads out on the valley floor. These are the ways in which wind action creates a number of interesting erosional and depositional features in the deserts. Describe chief landforms of river deposition. Fine particles remain suspended in water, large particles are just dragged along the bed of the river and smaller ones are rolled down in the centre. A natural watercourse flowing through a channel is called a river. Answer: Question 1. Fax: +44 01937 842110, We’re proud to sponsor TABS Cricket Club, Harrogate Town AFC and the Wetherby Junior Cricket League as part of our commitment to invest in the local community, Company Reg no: 04489574 | VAT reg no 816865400, © Copyright 2018 |Privacy & cookies|Terms of use, Middle Course of a River - Processes and Features, 16 million people affected by seasonal floods in southern Asia. By this stage a river may develop other features such as islands, deltas, oxbow lakes and braids.