Bellwork (back of books)

Bellwork (back of books)

Bellwork What factors influence flooding? Sort these into physical/human causes Flooding!!! Learning Objectives: Understand the term flood return interval Construct a graph to analyse the flood return

frequency and magnitude for Fema Creek, PA Flood Risk Risk is affected by: The frequency of flooding; how often floods can be expected. The magnitude of the flood; how severe or large each occurrence will be. The number and density of people living in the affected area. The amount of flood protection and prediction systems. The level of economic development; this affects an areas ability to afford

management strategies and preparedness, and its ability to cope in an emergency. Global Flood Risk in the next 30 years Figure 4: Humanitarian risk hotspots for flooding. The map shows flood risk hotspots based on the interaction of extreme and significant flood hazard and high overall human vulnerability. Also shown are areas with significant or extreme flood hazard but lower human vulnerability and areas where climate models predict an increase in extreme precipitation, as an indicator of possible future increases of flood risk.

http://www.careclimatechange.org Flood Risk in the UK Describe the distribution of flood risk in England Magnitude-Frequency Flood Risk Analysis

Floods of a very large size (magnitude) dont happen very often (theyre not very frequent) Floods of a small magnitude are more frequent Large floods usually occur due to unusually heavy or prolonged rainfall There is one exception to this rule! Large floods can still happen in places where there is annual snowmelt or monsoon rains, e.g.

Bangladesh Even in areas where this does not happen it is still possible for very large floods to occur more frequently than expected. By keeping records over many years hydrologists can predict how often a flood of a certain magnitude may occur This is called the flood recurrence interval (RI)

Definition Flood return interval Magnitude-Frequency Flood Risk Analysis A small flood may have a RI of 2 years A huge flood may have a RI of 100 years This information can be used to decide what sort of flood protection is needed and where.

Magnitude-Frequency Flood Risk Analysis TASK Complete the Flood Frequency worksheet for Fema Creek Extension: Make notes from p. 30 about how floods are managed in the UK and how seasonal discharge can be assessed. RECURRENCE INTERVALS

This can allow planners to zone the flood plain and plan land use. They can also be used to predict the occurrence of low flow. In order to minimise the damage from floods it is useful to know how often a flood of a certain size might occur. The time between

flood events of the same size is called the recurrence interval. Work out the discharge for 1. 1.5 years 2.

5 years 3. 20 years Post it Plenary Suggest how flood recurrence could influence land use planning and building

regulations in flood plain areas

Recently Viewed Presentations

  • The People at the Cross The People at

    The People at the Cross The People at

    Simon of Cyrene -When the humanity of Jesus failed, he could no longer carry the Cross. Simon was there. Matthew 27:32, Mark 15:21, Luke 23:26. Simon was there and when least expected compelled to pick up the Cross and carry...
  • A tale of 2 partnerships: the challenges of small-scale and ...

    A tale of 2 partnerships: the challenges of small-scale and ...

    a tale of 2 partnerships: the challenges of small-scale and large-scale research communities within english for academic purposes (eap) mary davis
  • Menopause Basics - unich.it

    Menopause Basics - unich.it

    Menopause Basics Learning Objectives: Describe the hypothalamic-pituitary-ovarian axis Differentiate between Perimenopause and Menopause Learn physiologic and anatomic changes at menopause Describe typical menopausal symptoms Perform focused history +physical for menopausal woman Interpret selected laboratory tests to evaluate menopause.
  • Exploring usability effects of increasing security in click ...

    Exploring usability effects of increasing security in click ...

    Exploring usability effects of increasing security in click-based graphical passwords Elizabeth Stobert , Alain Forget , Sonia Chiasson , Paul C. van Oorschot , Robert Biddle Authentication Methods
  • Rosas Danst Rosas - Meden School

    Rosas Danst Rosas - Meden School

    Rosas Danst Rosas (1983 & 1997) Choreographer - Anne Teresa De Keersmaeker ... The dance takes place in the corridors and rooms of a large, austere, empty school in Belgium. Windows, doors and walls frame the action. ... Key actions...
  • Cold War Conflicts

    Cold War Conflicts

    Concrete and Abstract Nouns. Concrete nouns are the words that most people think of as nouns. They are mostly the names of objects and animals (countable) and substances or materials (uncountable). Cake, oxygen, iron, boy, dog, pen, glass,, earthworm and...
  • Reporting and Assessment

    Reporting and Assessment

    Extra Opportunities:Extended Project Qualification (YEAR 13) - AS Level - Students create their own project title - Forms part of the AQA Baccalaureate"Is theatre elitist?""How will the music industry continue to operate?"
  • The Nervous System

    The Nervous System

    Reflexes Brain Stem Spinal Cord Contains both gray and white matter Gray matter is H-shape in core of cord Gray Matter Regions of brain and spinal cord made up primarily of cell bodies and dendrites of nerve cells Interneurons in...