Be READY TO LEARN ACTIVATE River flooding is

Be READY TO LEARN ACTIVATE River flooding is a natural phenomenon Think like a Geographer LO: To explore how physical and human factors affect the flood risk.

Be READY TO LEARN ACTIVATE River flooding is a natural phenomenon Think like a Geographer LO: To explore how physical and human factors affect the flood risk.

CONNECT Be READY TO LEARN Think like a Geographer Factors increasing Flood Risk https: //www. youtube. com/w atch? v=na 7 g. DIM 2 BDQ Examine these pictures. In groups, discuss the factors (physical and human) that may have caused flooding. LO: To explore how physical and human factors affect the flood risk.

ACTIVATE Be READY TO LEARN Think like a Geographer LO: To explore how physical and human factors affect the flood risk.

ACTIVATE Be READY TO LEARN Think like a Geographer LO: To explore how physical and human factors affect the flood risk.

ACTIVATE Be READY TO LEARN Think like a Geographer LO: To explore how physical and human factors affect the flood risk.

ACTIVATE Be READY TO LEARN Think like a Geographer LO: To explore how physical and human factors affect the flood risk.

ACTIVATE LO: To explore how physical and human factors affect the flood risk.

ACTIVATE LO: To explore how physical and human factors affect the flood risk.

Flood Map

ACTIVATE Be READY TO LEARN Think like a Geographer Write the Learning Objective. LO: To explore how physical and human factors affect the flood risk. SUCCESS CRITERIA: I can describe what a flood is and what causes flooding. I can explain how physical factors influence flood risk. I can explain how human factors influence flood risk. I can describe a hydrograph and why it is important I can evaluate to what extent river flooding is a natural phenomenon. 3 4 FACTORS INCREASING FLOOD RISK 5 6+

ACTIVATE What is Flooding? Be READY TO LEARN Think like a Geographer A flood is…. A flood happens when… 3 things that can cause flooding are… LO: To explore how physical and human factors affect the flood risk.

ACTIVATE What is Flooding? Be READY TO LEARN Think like a Geographer Flooding is where land that is not usually underwater becomes inundated. A river flood occurs when a river channel can no longer hold the amount of water flowing in it. Water overtops the banks and flood the land – floodplain. LO: To explore how physical and human factors affect the flood risk.

ACTIVATE Be READY TO LEARN Think like a Geographer What causes Flooding? River floods usually occur after a long period of rainfall, often during the winter months. The volume of water increases causing the river level to rise. Sudden floods can occur during torrential storms – these are known as flash floods. They are often associated with flooding from heavy rainfall in the summer. LO: To explore how physical and human factors affect the flood risk.

Boscastle floods news 6 minutes https: //www. youtube. com/watch? v= d. Qxc-XCLG_Q

ACTIVATE Be READY TO LEARN Think like a Geographer Write the Learning Objective. LO: To explore how physical and human factors affect the flood risk. SUCCESS CRITERIA: I can describe what a flood is and what causes flooding. I can explain how physical factors influence flood risk. I can explain how human factors influence flood risk. I can describe a hydrograph and why it is important I can evaluate to what extent river flooding is a natural phenomenon. 3 4 FACTORS INCREASING FLOOD RISK 5 6+

ACTIVATE Be READY TO LEARN Think like a Geographer Write the Learning Objective. LO: To explore how physical and human factors affect the flood risk. SUCCESS CRITERIA: I can describe what a flood is and what causes flooding. I can explain how physical factors influence flood risk. I can explain how human factors influence flood risk. I can describe a hydrograph and why it is important I can evaluate to what extent river flooding is a natural phenomenon. 3 4 5 FACTORS INCREASING FLOOD RISK 6+

ACTIVATE Be READY TO LEARN Think like a Geographer LO: To explore how physical and human factors affect the flood risk.

ACTIVATE Human Factors (Land use) Be READY TO LEARN Think like a Geographer Deforestation – Much of the water that falls on trees is evaporated or stored temporarily on leaves and branches. Trees also use up water as they grow. When trees are removed, much more water is suddenly available and transferred rapidly to river channels, increasing the flood risk. LO: To explore how physical and human factors affect the flood risk.

ACTIVATE Be READY TO LEARN Think like a Geographer LO: To explore how physical and human factors affect the flood risk.

ACTIVATE Physical Factors (Land use) Be READY TO LEARN Think like a Geographer Precipitation – torrential rainstorms or prolonged rainfall can lead to sudden flash floods as river channels can not contain the sheer volume of water flowing into them. Steady rainfall over several days can also lead to flooding in lowland river basins. LO: To explore how physical and human factors affect the flood risk.

ACTIVATE Be READY TO LEARN Think like a Geographer LO: To explore how physical and human factors affect the flood risk.

ACTIVATE Physical Factors (Land use) Be READY TO LEARN Think like a Geographer Relief – In highland environments steep slopes encourage a rapid transfer of water towards river channels. This increases the risk of flooding. LO: To explore how physical and human factors affect the flood risk.

ACTIVATE Be READY TO LEARN Think like a Geographer LO: To explore how physical and human factors affect the flood risk.

ACTIVATE Human Factors Be READY TO LEARN Think like a Geographer Agriculture – In arable farming, soil is left unused and exposed to the elements for periods of time. This can lead to more surface runoff. This is increased if the land is ploughed up and down steep slopes, as water can flow quickly along the furrows (long narrow trenches). LO: To explore how physical and human factors affect the flood risk.

ACTIVATE Be READY TO LEARN Think like a Geographer LO: To explore how physical and human factors affect the flood risk.

ACTIVATE Physical Factors Be READY TO LEARN Think like a Geographer Geology – Impermeable rocks (rocks that do not allow water to pass through them) such as granite, shales and clays encourage water to flow overland (runoff) and into river channels. This increases the river discharge (amount of water in a river) and makes flooding more likely. LO: To explore how physical and human factors affect the flood risk.

ACTIVATE Be READY TO LEARN Think like a Geographer LO: To explore how physical and human factors affect the flood risk.

ACTIVATE Human Factors Be READY TO LEARN Think like a Geographer Urbanisation – Building on floodplains creates impermeable surfaces such as tarmac roads, concrete driveways and slate. This increases surface runoff and water is transferred quickly to drains and sewers and then into river channels. This rapid movement of water increase the risk of flooding. LO: To explore how physical and human factors affect the flood risk.

ACTIVATE Be READY TO LEARN Think like a Geographer LO: To explore how physical and human factors affect the flood risk.

AFL Be READY TO LEARN Think like a Geographer Question Time 1. List 3 physical/natural factors that influence flood risk. 2. What is flooding? A) Flooding is where land is not usually underwater becomes inundated. B) Flooding is where land is not usually inundated becomes underwater. 3. List 3 human factors that influence flood risk. 4. What is surface runoff? A) Surface runoff is water, from rain that flows under the land surface, and is a major component of the water cycle. B) Surface runoff is water, from rain, snowmelt, or other sources, that flows over the land surface, and is a major component of the water cycle. LO: To explore how physical and human factors affect the flood risk.

Turn to page 20 and complete this sheet

ACTIVATE What is a Hydrograph? Be READY TO LEARN Think like a Geographer The volume of water flowing along a river is its discharge. It is measured in cumecs (cubic metres per second). Hydrographs plot river discharge after a storm. It shows how discharge rises during a storm, reaches its peak and then returns to the normal rate of flow. The shape of a hydrograph is affected by rainfall and by drainage basin characteristics. LO: To explore how physical and human factors affect the flood risk.

ACTIVATE What is a Hydrograph? Be READY TO LEARN Think like a Geographer The volume of water flowing along a river is its discharge. It is measured in cumecs (cubic metres per second). Hydrographs plot river discharge after a storm. It shows how discharge rises during a storm, reaches its peak and then returns to the normal rate of flow. The shape of a hydrograph is affected by rainfall and by drainage basin characteristics. https: //www. youtube. com/watch? v=h. Jft. AYYXp. Vw

ACTIVATE Be READY TO LEARN Think like a Geographer In your books, identify which river is more likely to flood. Outline reasons for your answer. LO: To explore how physical and human factors affect the flood risk.

ACTIVATE Be READY TO LEARN Think like a Geographer In your books, identify which river is more likely to flood. Outline reasons for your answer. LO: To explore how physical and human factors affect the flood risk.

ACTIVATE Be READY TO LEARN Think like a Geographer Write the Learning Objective. LO: To explore how physical and human factors affect the flood risk. SUCCESS CRITERIA: I can describe what a flood is and what causes flooding. I can explain how physical factors influence flood risk. I can explain how human factors influence flood risk. I can describe a hydrograph and why it is important I can evaluate to what extent river flooding is a natural phenomenon. 3 4 5 FACTORS INCREASING FLOOD RISK 6+

DEMONSTRATE Be READY TO LEARN Think like a Geographer ‘River flooding is a natural phenomenon. ’ To what extent do you consider this statement to be correct? (6) LEVEL SUCCESS CRITERIA 3 (Detailed) 5 -6 marks Shows precise and detailed knowledge of the causes of flooding. Gives detailed explanation of factors causing flooding. Analyses and evaluates the extent to which flooding is a natural phenomenon. 2 (Clear) 3 -4 marks Shows specific and clear knowledge of causes of flooding. Gives some detailed explanation of factors causing flooding. Demonstrates some analysis and evaluation of the extent to which flooding is a natural phenomenon. 1 (Basic) 1 -2 marks Shows limited knowledge of the causes of flooding. Includes limited application of knowledge and understanding to interpret geographical information giving detailed explanation of factors causing flooding. Limited attempt to analyse and evaluate the extent to which flooding is a natural phenomenon. https: //www. youtube. com/watch? v=8 zh. BISqe. Gq. A

DEMONSTRATE Be READY TO LEARN Think like a Geographer ‘River flooding is a natural phenomenon. ’ To what extent do you consider this statement to be correct? (6) MODEL ANSWER: The statement is partially correct as physical factors such as increased precipitation can increase flood risk (1). For example, prolonged rainfall can lead to flooding in winter and sudden torrential rainfall can lead to flash floods in summer (1). This is because river cannot contain the sheer volume of water flowing into them (1). This is a physical factor increasing flood risk. However, the statement is also partially incorrect because human factors such as deforestation and urbanisation cause greater risk of flooding (1). For example, the removal of trees to make way for buildings on floodplains creates impermeable surfaces such as tarmac roads, concrete driveways and slate roofs (1). The trees would have intercepted rainfall causing evaporation and temporary water storage. Trees would have also used water to grow. The removal of trees means that water is transferred rapidly to river channels, if urbanisation takes place then water will also be transferred rapidly from surface run off along impermeable surfaces, therefore increasing flood risk (1). To conclude I consider the statement to be mostly incorrect as human factors cause greater risk of flooding through changing the environment and causing more surface run off. LO: To explore how physical and human factors affect the flood risk.

MODEL ANSWER: DEMONSTRATE Be READY TO LEARN Think like a Geographer ‘River flooding is a natural phenomenon’ The statement is partially correct as physical To what extent do you consider this statement to be factors such as increased precipitation can correct? (6) increase flood risk (1). For example, prolonged rainfall can lead to flooding in winter and sudden torrential rainfall can lead to flash floods in summer (1). This is because river cannot contain the sheer volume of water flowing into them (1). This is a physical factor increasing flood risk which shows that river flooding is caused by nature to some extent. LO: To explore how physical and human factors affect the flood risk.

MODEL ANSWER: DEMONSTRATE Be READY TO LEARN Think like a Geographer However, the statement is also partially incorrect ‘River flooding is a natural phenomenon’ because human factors such as deforestation and To what extent do you consider this statement to be urbanisation cause greater risk of flooding (1). For correct? (6) example, the removal of trees to make way for buildings on floodplains creates impermeable surfaces such as tarmac roads, concrete driveways and slate roofs (1). The trees would have intercepted rainfall causing evaporation and temporary water storage. Trees would have also used water to grow. The removal of trees means that water is transferred rapidly to river channels, if urbanisation takes place then water will also be transferred rapidly from surface run off along impermeable surfaces, therefore increasing flood risk (1). LO: To explore how physical and human factors affect the flood risk.

MODEL ANSWER: DEMONSTRATE To conclude I consider the statement to be ‘River flooding is a natural phenomenon’ mostly as human factors cause To whatincorrect extent do you consider this statement to be greater risk of flooding through changing the correct? (6) environment and causing more surface run off. Be READY TO LEARN Think like a Geographer LO: To explore how physical and human factors affect the flood risk.

MODEL ANSWER: Be READY TO LEARN Think like a Geographer The statement is partially DEMONSTRATE correct as physical factors such as increased precipitation can increase flood risk (1). For example, prolonged rainfall can ‘River flooding is a natural phenomenon’ lead to flooding in winter and sudden torrential rainfall can lead to flash floods in summer (1). This is because river cannot contain the sheer volume of water To what extent do you consider this statement to be flowing into them (1). This is a physical factor increasing flood risk which shows correct? (6) that river flooding is caused by nature to some extent. However, the statement is also partially incorrect because human factors such as deforestation and urbanisation cause greater risk of flooding (1). For example, the removal of trees to make way for buildings on floodplains creates impermeable surfaces such as tarmac roads, concrete driveways and slate roofs (1). The trees would have intercepted rainfall causing evaporation and temporary water storage. Trees would have also used water to grow. The removal of trees means that water is transferred rapidly to river channels, if urbanisation takes place then water will also be transferred rapidly from surface run off along impermeable surfaces, therefore increasing flood risk (1). To conclude I consider the statement to be mostly incorrect as human factors cause greater risk of flooding through changing the environment and causing more surface run off. LO: To explore how physical and human factors affect the flood risk.

DEMONSTRATE Be READY TO LEARN Think like a Geographer ‘River flooding is a natural phenomenon. ’ To what extent do you consider this statement to be correct? (6) LEVEL SUCCESS CRITERIA 3 (Detailed) 5 -6 marks Shows precise and detailed knowledge of the causes of flooding. Gives detailed explanation of factors causing flooding. Analyses and evaluates the extent to which flooding is a natural phenomenon. 2 (Clear) 3 -4 marks Shows specific and clear knowledge of causes of flooding. Gives some detailed explanation of factors causing flooding. Demonstrates some analysis and evaluation of the extent to which flooding is a natural phenomenon. 1 (Basic) 1 -2 marks Shows limited knowledge of the causes of flooding. Includes limited application of knowledge and understanding to interpret geographical information giving detailed explanation of factors causing flooding. Limited attempt to analyse and evaluate the extent to which flooding is a natural phenomenon. LO: To explore how physical and human factors affect the flood risk.

ACTIVATE Be READY TO LEARN Think like a Geographer Write the Learning Objective. LO: To explore how physical and human factors affect the flood risk. SUCCESS CRITERIA: I can describe what a flood is and what causes flooding. I can explain how physical factors influence flood risk. I can explain how human factors influence flood risk. I can describe a hydrograph and why it is important I can evaluate to what extent river flooding is a natural phenomenon. 3 4 FACTORS INCREASING FLOOD RISK 5 6+

Be READY TO LEARN CONSOLIDATE Think like a Geographer Thought Shower Fill your cloud with all the new information you have learnt today. LO: To explore how physical and human factors affect the flood risk.