Objective: To create a 2 minute animated RSA video to answer the following question. If they flocculate they become heavier and are more likely to be deposited.Įxplain the change in the shape and characteristics of a named river as it travels from source to mouth (7) Salt can cause flocculation, so when freshwater meets the sea (saltwater) particles are likely to flocculate. There are three types of delta arcuate, cuspate and bird's foot.ĭistributary: A distributary is a small river or stream that breaks off from the main river in deltas.įlocculation: This is the process of particles (load/sediment) joining together. Deltas have very fertile soil and tend to be excellent for farming. Deposition can mean that the main river channel gets blocked, forcing the water to find alternative routes to the sea by making distributaries. If the river deposits quicker than the sea can erode then a delta starts to develop. This reduction in velocity means that much of the rivers load is deposited at the mouth of the river. Make notes on the formation of both fluvial features and compliment this with an image or diagram of each to help with your revision later.ĭeltas: When a river meets the sea its velocity suddenly reduces. No access to GATW? Click here and scroll down to the information on floodplains & levees. Complete the worksheet before printing it out and placing into your Geography folder. Task 2 - Click here to be taken to the geographyalltheway section on floodplains and Levées. Annotate it (like the meanders & oxbow lakes) with theory information from page 13 of the OCR B textbook or check here to show features and formations. Using the map embedded above, find a suitable Google Maps (satellite view) of the mouth of the Garonne and take a screen shot. List down the top three differences you see when you compare both. Watch a few seconds of the video to the right and then cast your mind back to the Google Street View image of the source of the Garonne. Objective:To learn about the features associated with the lower course of the river Garonne. Take a screenshot and complete a piece of writing describing the typical characteristics of this upper course area of the river. The first is of an area close to the source of the Garonne and the second near Vielha. Task 3 - Study the Google StreetView images below. No access to OCR B textbook? Click here for more information on V Shaped valleys and here for information on interlocking spurs. Using this (& fig 1.11 on p.10 of the OCR B textbook), create a three part cartoon diagram to show the formation of a v-shaped valley and interlocking spurs. Task 2 - Watch the video to above & right that explains processes in the upper course. Snow melt, transported, erosion, V-shaped, avalanches, gradient, abrasion, lateral, bed This often makes the valley steeper and gives it a _ appearance. Landslides and _ can carry materials down the slope and into the river where it is _ away. Remember that the conditions in the Pyrenees can be harsh and therefore weathering can affect the slopes of the valley. The main process of erosion is _ and this causes _ and vertical erosion of the banks and the _ of the river.
In the upper course of any river, _ is always the main force because the _ of the river is steep and it has a lot of energy, especially during _ _ and heavy rain. Task 1 - Copy & Complete (choose from words below)
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