Risk Determination Flashcards
Forces of Water
- Bouyant
- Hydrostatic
- Hydrodynamic
- Debris Impact
Buoyancy
Uplift caused by water
Hydrostatic force
Force of standing water on a solid object
Hydrodynamic force
The pressure of moving water pushing on a solid object
Three primary categories of flood risk
Riverine, shallow, coastal
Hazards associated with riverine flooding (3)
Overbank flooding, flash flooding, riverine erosion
Hydrology in Riverine Modeling
Determines the flow rate of water that passes a certain point
Hydraulics in Riverine Modeling
Calculates the depth of the base flood based on the configuration and “roughness” of channel and adjacent area that carries water
How are flow determinations made?
Statistical analysis of stream gauge records and regression equations such as area of watershed, land cover, etc.
What does hydrology look at in an H&H?
The amount of flood discharge and the flood frequency
Gauges peak rate of stream flow during a flood throughout a watershed
What does hydraulics look at in an H and H?
The flood elevations and flood velocities
Predicts water surface elevations that occur at a particular site during a flood
Hydrological analysis
Studies of the amount of water flowing in a stream during flood events
Peak flood discharges (hydrologic analysis)
Detailed study determining of water
Hydrologic analysis: flood frequency
Determined via statistical analysis if data is available/appropriate
