Podcast
Questions and Answers
What is the main purpose of levee armoring?
What is the main purpose of levee armoring?
- To reduce susceptibility to erosion by floodwaters (correct)
- To prevent seepage under the levee
- To allow water to flow easily over the levee
- To increase the height of the levee
What does controlled overtopping seek to achieve?
What does controlled overtopping seek to achieve?
- To prevent all instances of levee failure
- To increase the overall levee height
- To reduce overtopping failures in designated areas (correct)
- To concentrate floodwaters in less developed areas
Which of the following is NOT a factor in determining levee survival in significant flood events?
Which of the following is NOT a factor in determining levee survival in significant flood events?
- Height of surrounding buildings (correct)
- Depth and duration of flow
- Flow velocity
- Erosive resistance of vegetation
What is the benefit of using notches or openings in levee design?
What is the benefit of using notches or openings in levee design?
Which material is commonly used in levee armoring?
Which material is commonly used in levee armoring?
What is flooding primarily described as?
What is flooding primarily described as?
Which factor contributes to increased flooding due to geology?
Which factor contributes to increased flooding due to geology?
What are levees primarily designed to do?
What are levees primarily designed to do?
What is a major disadvantage of embankments as a flood control measure?
What is a major disadvantage of embankments as a flood control measure?
What distinguishes a levee from a dike?
What distinguishes a levee from a dike?
How does increased rainfall contribute to flooding?
How does increased rainfall contribute to flooding?
What is one of the pros of using structural mitigation measures like levees?
What is one of the pros of using structural mitigation measures like levees?
What is a common ecological consequence of deforestation related to flooding?
What is a common ecological consequence of deforestation related to flooding?
What is the primary purpose of structure elevation?
What is the primary purpose of structure elevation?
Which of the following best defines base flood elevation (BFE)?
Which of the following best defines base flood elevation (BFE)?
What does non-structural mitigation measures involve?
What does non-structural mitigation measures involve?
Which method is NOT considered a non-structural mitigation measure?
Which method is NOT considered a non-structural mitigation measure?
What is one of the benefits of coastal sand dunes?
What is one of the benefits of coastal sand dunes?
Which of the following is a con of warning systems for flood alerts?
Which of the following is a con of warning systems for flood alerts?
What is afforestation primarily aimed at achieving?
What is afforestation primarily aimed at achieving?
What is a common disadvantage associated with hazard forecasting systems?
What is a common disadvantage associated with hazard forecasting systems?
What is a disadvantage of constructing dams?
What is a disadvantage of constructing dams?
What is a characteristic of a buttress dam?
What is a characteristic of a buttress dam?
Which type of dam is designed to divert water from its original course?
Which type of dam is designed to divert water from its original course?
Floodways, spillways, and channels are designed to manage floodwaters by:
Floodways, spillways, and channels are designed to manage floodwaters by:
What type of dam relies on its own weight and internal strength for stability?
What type of dam relies on its own weight and internal strength for stability?
What is one of the primary uses of a dam?
What is one of the primary uses of a dam?
What is a common feature of levees and dikes?
What is a common feature of levees and dikes?
What is one benefit of floodways, spillways, and channels during high flood levels?
What is one benefit of floodways, spillways, and channels during high flood levels?
What is the primary goal of dry floodproofing?
What is the primary goal of dry floodproofing?
Which of the following is NOT an example of dry floodproofing?
Which of the following is NOT an example of dry floodproofing?
How does wet floodproofing make a structure resistant to floods?
How does wet floodproofing make a structure resistant to floods?
Which floodproofing measure involves permanent barriers?
Which floodproofing measure involves permanent barriers?
What is the focus of land use planning?
What is the focus of land use planning?
What does zoning regulate?
What does zoning regulate?
Which of the following is a characteristic of dry floodproofing?
Which of the following is a characteristic of dry floodproofing?
What is a common misconception about floodproofing?
What is a common misconception about floodproofing?
Study Notes
Flooding Overview
- Flooding occurs when water overflows from a body of water onto surrounding land.
- Main causes include heavy rainfall, geology (e.g., impermeable rocks), vegetation changes, and increased rainfall duration.
Structural Mitigation Measures
- Structural measures comprise engineering and construction methods aimed at reducing flood risks.
- Common structural controls include levees, floodwalls, seawalls, embankments, and dams.
Levees
- Levees raise river banks to contain floodwaters and protect normally dry land.
- Differences between levees and dikes: levees guard dry land; dikes hold back areas that are usually underwater.
Dams
- Dams are barriers that store floodwaters and can generate electricity.
- Types of dams include embankment, buttress, diversion, and gravity dams, each with specific structural features.
Floodways, Spillways, and Channels
- These structures facilitate the movement of floodwaters away from areas at risk, especially in urban settings, reducing flood risks during high water levels.
Non-Structural Mitigation Measures
- Non-structural measures focus on reducing disaster risks without physical construction and involve management strategies and planning.
Risk Mapping and Hazard Forecasting
- Effective risk mapping identifies vulnerable areas, while hazard forecasting helps predict potential flooding events.
- Early warning systems provide advance notifications to residents.
Dry and Wet Flood Proofing
- Dry flood proofing includes techniques to make structures watertight; examples include waterproof coatings and backflow valves.
- Wet flood proofing allows water to enter and exit structures, minimizing damage during flooding events.
Natural Systems for Mitigation
- Utilizing natural features such as wetlands, coastal sand dunes, and afforestation helps absorb floodwaters and stabilize landscapes.
- Wetlands act as sponges, filtering excess water and reducing flood impacts.
Land Use Planning and Zoning
- Land use planning strategically allocates areas for specific purposes (e.g., residential, agricultural) to mitigate flood risks.
- Zoning regulations control the density, height, and design of buildings, allowing for safer construction practices.
Key Considerations in Flood Mitigation
- Controlled overtopping and levee armoring enhance levee resilience against erosion and floodwaters.
- Structure elevation based on Base Flood Elevation (BFE) helps protect buildings from expected flood levels.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
Test your understanding of flood control strategies in this quiz. Explore both structural and non-structural mitigation measures and their relation to flooding alleviation. Learn how levees and other measures function in flood management.
