AS Unit 1 Rivers June09 Jan10 May10 Jan11 May11 May12 Jan 13 May13 May 14 May 15 May 16 The drainage basin cycle Describe how water reaches a river channel in a drainage basin. 4 Define (2) How is lost (3) The water balance. Water balance of B’ham – factfile to complete e.g. define soil moisture Factors affecting river discharge: the storm Draw sketch on Figures 1a and 1b to show the effects of each of the two rainfall periods on river (3 marks) Hydrographs and draniange basin – (4 marks) and explain (5) . discharge
Suggest reasons for the in the shapes of the that you have drawn in 1(b)(i). 3 Explain likely effects of the forest on The long profile Describe the long profile of the River Dee from one of its sources at 775833 to the bridge in Dent at 707872. (4) Describe how and explain why river long profiles and valley cross profiles change changing types of erosion, and types of load a) Outline the ways in which a river transports its load. 3 Describe how a river erodes material from its bed and banks.(3) Describe the different types of load a river carries (4) Hjulstrom Curve Figure 1 shows the Fig 1 transport
curve. Figure 1, describe the between velocity and load size for the process of erosion. 4 curve Read info (2) Describe the vel, load size and (3) Valley profiles – long profile and changing cross profile graded profile, potential and kinetic energy Contrast the cross profile of the valley occupied by the river at 775851 (Dee Side House) with that at 715868.(4) Explain why a river valley changes in its cross profile . Changing channel – profile, wetted Channel such as cross profile, wetted hydraulic
hydraulic radius, efficiency, and links to velocity and radius, and efficiency change Describe and explain how channel change 15 . of fluvial erosion and – potholes, rapids, gorges, braiding, levees, flood plains and deltas. Figure 2 shows potholes; landforms resulting from fluvial erosion. Figure 2 Describe these potholes and explain their formation. 7 Describe the shown in Figure 2.(4) – Flooding is in the formation of some river With the help of Figure 2, describe the role of flooding in the formation of river Figure 1 which shows a river in the Glens of Antrim, Northern Ireland. Label Figure 1 to describe the of the landforms shown. 4 – (ii) Explain the formation of the landforms shown in Figure 1.7 Draw a labelled sketch plan to show the of the delta.(4) Explain the formation of a delta (7) Describe how and explain why fluvial change (15) Describe middle course in photo (4) Draw and explain meander (6 Photo of potholes Describe landforms resulting from fluvial erosion shown in Figure 1.(4) Explain the formation of a waterfall(4)
6 Processes and im pact of – knick points, river terraces and incised (d) Describe and explain the formation of landforms resulting from Outline the cause(s) of 2 Describe the incised meander shown in Figure 1 and explain the of this Explain the role of rejuvenation in the formation of river terraces.(7) . analysis of flood risk What is meant by the term of a flood? 2 Figure 1 which shows the predicted return period of flood events for the River Ouse at York. the analysis 2
shown in Figure 1.3 Physical and human causes of flooding – two case studies of recent flooding events should be from areas of the world. Impact of flooding – two case studies of recent flooding events should be from areas of the world Compare and comment on the economic and social effects of flooding in two areas of the world.(15) Explain one way in people can cause flooding. 4 Assess the relative of physical and human causes of river With the help of Figure 2, explain why floods occurred in Pakistan in August 2010. 4 With to one case study, discuss the impact of flooding on people and the 15 Study news article – on the different impacts of flooding (6) Physical and factors affecting discharge. 15 Relative importance of physical and human causes of flooding (6 marks) With reference to two case studies, discuss the impact of flooding in contrasting areas of the world.(15) Flood strategies – to include hard – dams, Discuss the and of hard as a flood ‘Soft is a better river flood strategy than hard Discuss Dams – describe and 4 Advantages and of hard and soft engineering (15 marks)