GEOG 256 10 17 13 Lecture 11 Outline of Last Lecture I Why care about wildlife conservation II Pima County Buffer overlay zone Outline of Current Lecture I Natural Hazards II Fire Danger Prevention III Landslide Current Lecture I Natural Hazards a Emergency kit for zombie apocalypse and other natural disaster i Water ii Food iii Medications iv Tools and supplies v Sanitation and hygiene vi Clothing and bedding vii Important documents viii First aid supplies b Risk Hazard Exposure Vulnerability i Natural Hazard 1 Potential catastrophic and chronic physical events a Past recurrence intervals b Future Probability c Speed of Onset d Magnitude e Duration f Spatial extent ii Vulnerable System 1 Exposure a Population b Economy c Land use and development d Infrastructure and facilities These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute e Cultural assets 2 Vulnerability a Mitigate b Prepare c Respond d Recover c Mitigation Hierarchy i Avoid 1 Move people valuables away prevent any exposure development ii Mitigate 1 Reduce hazard by reducing anthropogenic causes 2 Reduce exposure Live Work in less exposed areas 3 Reduce vulnerability a Allow less vulnerable uses b Apply tougher use engineering and design standards c Improve prediction and warning iii Compensate Victims Disaster Response 1 Provide relief insurance re construction re population d Flood management i Floodplain 1 Area susceptible to flooding ii 100 year floodplain 1 A floodplain with a 1 chance of flooding in any year iii Floodway 1 Narrow area close to a channel Stream or wash that must remain open so flood waters can pass thru and so flood is not made worse downstream by upstream development iv Floodway fringe 1 Area in the 100 year floodplan that can be obstructed without causing significant increase in the 100 year flood carried by the floodway e Pima County Regualtions i National flood insurance program 1 Subsidizes private flood insurance for commercial and residential property in any location Requires local floodplain zoning ii Pima County Zoning 1 Existing Property and repairs are exempted 2 A use permit from flood control district required for development in special flood hazard areas 3 The engineer may require special studies and information 4 No uses are allowed in floodways except parking lots farms open space II III 5 In floodway fringe lowest floor of habitable structures must be 1 above base flood Non habitable structures and walls can be flood proofed with brick block steel and openings and exits for water 6 Erosion setbacks of 75 500 feet depending on base flood peak discharge rate for major washes 25 50 for minor washes Fire Danger Prevention a Hazard based fire hazard rating based on slope weather fuel i Fire is hotter at the top so homes on steep inclines or on top of hills are in more danger b Vulnerability based rating focused on man made features c Wildlife Urban Fire interface overlay district i The purpose is to protect the public health safety and welfare by establishing standards 1 Minimize the potential of spreading fire from wild land areas to structures 2 Establish special standards d Defensible survivable space i Landscaping 1 30 defensible space ii Vehicular access 1 Multiple access using looped roads dead ends w turnarounds 2 Two 10 ft lanes 3 Driveways with 14 height iii Signage 1 Clear streets and house numbers iv Emergency water 1 Minimum flow regulations signed hydrants v Building standards and zoning laws Landslide a Debris Flow i Torrential rainfall swells streams ii Sediment dumps into a raging stream forming a slurry Debris Flow iii The debris flow swells in volume as it picks up additional sediment and trees from the channel and canyon walls b Sonoma Co Hazard Mitigation Plan i Goal2 Reduce the vulnerability of people and property exposed to landslide hazards 1 Objective 2 1 assure that landslide hazard maps are available a 2 1 3 identify areas of potentially high landslide damage and utilize this information in the development review process 2 Objective 2 4 improve the ability of infrastructure to withstand a 2 4 2 incorporate vulnerability assessment and mitigation into all infrastructure projects 3 Objective 2 5 Reduce the landslide risk and increase the mitigation capability of residents and businesses