1) The characteristics of the River Seine change as it flows from point R to point S.
Outline how these characteristics change. (4 marks)
Thursday 28 February 2013
Rivers Exam Practice 1
Have a go at the exam practice question below. Any other work missed use the Rivers Blog to help you catch up... http://rwsriverlanscapes.blogspot.co.uk/
1) The characteristics of the River Seine change as it flows from point R to point S.
Outline how these characteristics change. (4 marks)
1) The characteristics of the River Seine change as it flows from point R to point S.
Outline how these characteristics change. (4 marks)
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Erdogan Damdelen18 February 2013 07:04
ReplyDeleteAs point R is the source of the river it is on high land this means that as we follow the river down velocity of the current speeds up, and erosion mainly hydro-lick action and abrasion takes place causing the river to become deeper. At point S the gradient of the river has lowers as the river gets closer to the mouth and this also allows the river to become deeper as more water joins the river.
(4/4) Well done Ed, more than enough marks here. A very thorough answer that clearly meets the marking criteria. Hydraulic action. A useful spelling to learn. Very well answered. Check the mark scheme at the bottom of this post to check where you have banked your marks.
DeleteBrandon Li23 February 2013 15:49
ReplyDeleteFrom point R (the source) to point S (the mouth) the amount of water in the channel will increase due to more tributaries, the channel will get wider and deeper from processes like hydraulic action and abrasion, the speed at which the water is travelling will increase and the amount of sediment in the water will be increased from the amount of the channel that have been eroded.
(4/4)Excellent Brandon. Very clearly structured, accurate and concise. Well done for using the Bradshaw model. Check the mark scheme at the bottom of this post to see where you have banked your marks.
DeleteThanks sir.
DeleteAt point R is the river source. The river depth is shallow and the discharge is low. As we move down to point S, the occupied channel width increases due to more tributaries. Also, the river starts to get deeper and wider, which means the slope angles start to decrease. The channel bed also gets smoother as you move to point S because the Load Particle Size decreases as you move to point S.
ReplyDeleteThe bed gets deeper due to processes such as Hydraulic action and attrition
Delete(4/4) Fantastic level of detail Keenan and great use of terminology, i.e. occupied channel width. More than enough points here. Check the mark scheme at the bottom of this post to check where you have banked your marks. How much do you think you could take away from your answer and still get 4/4?
DeletePoint R is the river source. The discharge is low, and the depth is shallow. As the river progress upstream to point S,the channel width is widening due to more tributaries adding more water to the channel. The slope angle has become greater and the bed is now more rough. The bed deepens as attrition is taking place, wearing away the bed.
ReplyDelete(3/4) A sound answer Riaz but with some confusions. Did you mean as you move downstream from Point R to S? Your first point about channel width and increasing discharge is correct as you move downstream. But the slope angle decreases and the channel becomes smoother as you move towards point S. Double check the question and be logical in your approach. Check the mark scheme at the bottom of this post to check where you have banked your marks.
DeleteThis comment has been removed by the author.
ReplyDelete(Don't know what happend to my first comment) From point R (the source), the river channel is joined by many tributarys. Also as it goes from upper course to the middle course, the channel gets wider and deeper. Also, meanders form which could form ox-bow lakes and in time river scars.
ReplyDeleteHarry, you need to double check your Bradshaw model on your book and have a look at the mark scheme at the bottom. You can also read some of the other answer to see where and how they have banked top marks. Approach this question logically. I want you to reply to this message below like I have yours with another answer. Your comment on it getting wider and deeper would get you a mark, but focus on more characteristics (i.e. velocity if water, gradient, discharge), not features (i.e. meanders and ox bow lakes)
DeleteFrom point R (the source) the channel will widen and therefore increase the average velocity. Also, the load quantity will increase due to all of the connecting tributarys.
DeleteFrom point R to point S the amount of water in the channel will increase due to more tributaries also the channel will get wider and deeper because of processes like hydraulic action and abrasion.
ReplyDelete(4/4) Well done Henry, an extremely concise answer. Your mentioning of hydraulic power just scored you the 4th mark. I would encourage you mention one more characteristic change just to be safe, such as the gradient decreasing. Really well done though.
DeleteCheck the mark scheme at the bottom of this post to check where you have banked your marks.
from the source to the mouth the discharge,channel width, channel depth, Average velocity and load quantity increases due to tributaries that flow into the river. The river also flows in meanders and creates ox-bow lakes the river in its infancy is shallow and has larger particles in it and also has a high slope gradient. The river also has waterfalls along the way and in the lower course it flows into the river
ReplyDelete(4/4) Excellent Rudra, more than enough here.
DeleteCheck the mark scheme at the bottom of this post to check where you have banked your marks.
A question for you, how much of your answer could you leave out and still be safe in getting 4/4?
Well done.
OK
DeleteFrom point R to the mouth the volume of water will increase due to the addition of the tributaries. This will make the width and depth of the river larger. You can see in the middle/lower course of the river that ox-bow lakes and meanders have began to form getting closer to point S, the mouth. From the lower course you would expect to find mostly lateral erosion with meanders and ox-bow lakes and on the upper course you would find vertical erosion in V-shape valleys and interlocking sours
ReplyDelete*Spurs
Deletenot sours ...
(4/4) Excellent Nick. Very thorough. Nick, similar question to you... How much of this could you remove and still score 4/4? Have a look at the mark scheme below and tell me what you think.
DeleteAlso, characteristics (what the Bradshaw model shows us) and features, e.g. meanders, interlocking spurs etc. Try to give the question precisely what it's looking for... this will save you valuable time!
Well done.
At point R is the river mouth. As the river travels the amount of water will increase due to more tributaries joining. As it flows it'll become deeper due to abrasion and hydraulic action. The speed of the water will also increase because of the amount of sediment in the water.
ReplyDelete(4/4) Excellent James, like Henry, very concise and to the point. No words wasted. You would have scored 5, so good to be safe.
DeleteCheck the mark scheme at the bottom of this post to check where you have banked your marks.
Well done.
Thanks
DeleteThe river flows in meanders and creates ox-bow lakes in the river its infancy is shallow and has larger particles in it and also has a higher slope gradient. The river also has waterfalls along the way and in the lower course it flows into the river. From the source to the mouth the load quantity, channel depth, average velocity, discharge and channel width and increases due to tributaries that flow along the river.
ReplyDeleteStephen, you've copied what Rudra has already written. This is not acceptable.
DeleteReply to this below and answer the question in your own words.
Read my comments above to do this accurately.
I didn't copy anyone's work, I read other people's answers to help improve mine. I thought this was what you advised.
DeleteHere's my new answer:
The river gets wider and deeper as it travels from the source (point R) due to tributaries in the river and hydraulic action and abrasion. Oxbow lakes and meanders have also formed in the middle course of the river.
From point R (the source) to point S (the mouth) the amount of water in the channel will increase , the channel will get wider and deeper. meeandes will start to occur as the river slows down and hydrolic action and erosion will kick in
ReplyDeleteYou haven't quite secured 3/4 Max. You need to check your spelling too. Meanders are a river feature, not a river characteristic, also the river speeds up. And how can you more accurately describe how hydraulic action and other types of erosion 'kick in'?
DeleteReply to this below with a more accurate answer. Check the mark scheme at the bottom to help you.
from the source r to the mouth s, the amount of the water will increase and the channel would get wider and deeper. also meanders will start to occur even more and maybe an oxbow lake might be created. the proccesses hydraulic action and abrasion are occuring here.
ReplyDeleteSimilar comments to Max's above Ellis although more accurately described how erosion 'occurs'. That may get you the 3/4. I want a more detailed answer though Ellis. Have a look at comments I have made and check the mark scheme at the bottom of this post to check where you have banked your marks.
DeleteFrom the source to the mouth the volume of water increases because of tributaries flowing into the river; making the river wider and deeper. In the lower course meanders and ox bow lakes start to form due to lateral erosion and deposition. As the river flows it has a gretaer channel depth, average velocity, discharge and load quantity
ReplyDelete(4/4) Excellent answer Christian. More than enough points. Based on comments above, what could you take away from this and still secure a solid 4/4?
DeleteCheck the mark scheme at the bottom of this post to check where you have banked your marks.
Well done.
Ok
Delete'R' is the source of the river and has a low discharge, therefore a short width and a shallow depth. progressing upstream to point 'S', tributaries add more water increasing the channel width, depth and velocity, through processes such as abrasion and hydraulic action.
ReplyDelete4/4 Well done Hadley, well done for mentioning the correct types of erosion to back up your points. May be worth mentioning gradient too.
DeleteCheck the mark scheme at the bottom of this post to check where you have banked your marks.
Well done.
The source is point R, and the river will be shallow in the upper course, but will gradually get deeper as it flows into the middle course and to point S in the lower course. The tributaries mean that there will be more water, and this makes the river wider, and starts to form meanders. Abrasion and hydraulic action make the river wider and deeper. The added water means and increase in discharge, channel width, and average velocity.
ReplyDelete4/4 Excellent Dylan, more than enough here. Well done.
DeleteWhat could you remove to save time and still secure a safe 4/4?
Check the mark scheme at the bottom of this post to check where you have banked your marks.
From point R to point S the amount of water in the channel will increase due to more tributaries also the channel will get wider and deeper because of processes like hydraulic action and abrasion.
ReplyDeleteCameron. This is Henry's answer. I suggest you reply to this with your own answer immediately. This is totally unacceptable.
DeleteThe source of the river is at point R the rivers discharge is low consequently creating a short width and a shallow depth. As the river travels to point S ( the mouth) the rivers depth,width,discharge and average velocity will increase due to the tributaries. Hydraulic action and abrasion may have an effect on the factors of the river e.g width,depth. In the middle/lower course of the river you can see that ox-bow lakes and meanders have been formed making the journey of the water from point R to S easier.
ReplyDelete4/4 Well done Luke, lots of detail here. Too much for a 4 marker really so I want you to look at what you could take away and still safely score 4/4.
DeleteCheck the mark scheme at the bottom of this post to check where you have banked your marks and what info you can leave out.
Well done.
from the point R (The source) to the point S (The mouth)the channel width and depth increases caused by the tributaries that flow into the river. The river when closer to point S creates meanders and ox-bow lakes the river is shallow and has larger parts of sedimentary in it and a higher slope gradient this is because of processes such as hydraulic action and attrition
ReplyDeleteSeb, have a close look at previous comments and answer above and check the mark scheme at the bottom of this post to see where you can bank your marks.
DeleteWell done for writing it in all your own words. Use the Bradshaw model in your book to help you.
Reply to this below to have another go.
Luke Tanner
ReplyDeleteThe river's origin is point R as the river is shallower and narrow, the area nearer S are wider due to the tributaries and sources that increase the abrasion and errosion on the river sides causing the river to deepen in the lower course where it gets nearer to the sea.
3/4 Well done Luke. You have some sound points in here but it had to be carefully read to really see them. Have a look at some of the answers which scored 4/4, i.e. Henry's to see how the answer is structured.
DeleteWell done though Luke.
Check the mark scheme at the bottom of this post to check where you have banked your marks.
At point R (the source) the gradient is much steeper and the load particle size is much larger. As the river flows to point S (the mouth) the gradient decreases and the load particle size decreases due to attrition.
ReplyDeleteAn excellent start Jed but you will need to mention how other characteristics change to secure the 4 marks. Very well written though.
DeleteCheck the mark scheme at the bottom of this post to check where you have banked your marks and to see where you can add more.
Reply to this message to finish your answer.
At point R the gradient is much steeper and the load particle size is much larger. As the river flows to point S the gradient decreases and the load particle size decreases (due to attrition). Lateral erosion increases the width of the river downstream. Also,as more tributaries join the river, the discharge increases towards point S.
DeleteExcellent Jed. Well done. Can you see why this answer is so much stronger? Solid answer.
DeleteFrom point R (the source) to point S (the mouth) the gradient goes from being very steep to at the source then the gradient decreases due to attrition. Also the water will increase in the channel because more tributaries are joining up to it.
ReplyDeleteSimilar comment to Jed's above Dan. You will need to mention how a few more characteristics change to secure the 4 marks. Also... does the gradient change due to attrition? Check your key terminology.
DeleteA good start though Dan. Reply to this to finish your answer.
Check the mark scheme at the bottom of this post to check where you have banked your marks and where you can get more.
From point R to point S the width of the river will widen as you get more down stream due to lateral erosion. also the volume of water in the channel will increase because more tributaries will join on, as well the gradient will decrease as we get more towards the mouth
DeleteWell done Dan for improving your answer. 4/4
DeleteHere's what the mark scheme says for this question. Note: Knowing the Bradshaw model makes this question relatively straight forward. Your books are a tool! Use them wisely.
ReplyDeleteFor characteristic features expect width, depth, velocity, discharge and gradient.
Velocity – increases with distance downstream (1). If the river is deeper, there will be less contact between the river and its banks and bed so reduced friction, as a result of reduced wetted perimeter relative to CSA (cross sectional area) (1)
Depth – increases with distance downstream (1) as
greater discharge has more erosive power (1)
therefore eroding a deeper channel (1)
Gradient- this becomes more gentle as we go towards mouth and the river reaches sea level (1)
Discharge- this increases as the river moves towards the sea as more tributaries join the river. (1)
Width- increases downstream because of lateral erosion. (1)