Multi-Hazard Mitigation Plan: 01. Introduction

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Chapter 1:Appendix A 2. Mitigation Planning In the 2005 plan,discussed in the The mitigation planning effort included a major effort toward chapter on the planning process at the greater public outreach meetings and community workshops,and end. included a public opinion survey on disaster preparedness dealing with both individual and governmental preparedness and mitigation priorities. 3. Land Use and Development The 2005 plan introduction provided an Demographics and critical facility information has been updated, overview of Hawaii County geography, as well as the discussion of land use and development projections population,economic profile,land use, per the Hawaii General Plan. and projected growth. 4. High Wind Storms In the 2005 plan,a high wind history in In order to differentiate the risks due to seasonal storms versus Hawaii County is given. tropical cyclones(tropical storms and hurricanes),this separate chapter now examines the high wind event history and windspeed probabilities associated with seasonal climatology. This helps to emphasize that seasonal winds have no direct relationship to the much greater wind risk posed by hurricanes. 5. Tropical Cyclones In the 2005 plan,historical events are This chapter reflects the substantial improvement in the state of discussed,structural benchmark knowledge of the tropical cyclone hazard probabilities and the vulnerability dates are given,and a effect of island topography in producing areas with amplified summary of 2000-2001 research on windspeeds,new flood maps incorporating a hurricane flood probabilistic hurricane hazard analysis is insurance study,indications of a pilot study of hurricane shelter discussed. The needs for further work vulnerabilities,and new wind-resistant design and construction on hurricane hazard and topographic provisions in the new State Building Code(2009). wind speed-up are identified. 6. Landslides and Rock Falls The 2005 plan included a brief discussion This chapter additionally includes a discussion of the substantial on the various generic mechanisms for rockfalls generated by the 2006 Kiholo Bay earthquake,and landslides and rockfalls in Hawaii. examines a 2009 slope hazard map developed for use in earthquake loss modeling.Recommendations for improving the landslide susceptibility maps are given for a mitigation planning project that is starting in 2010 with the University of Hawaii. 7. Earthquakes The 2005 provided a basic description of This chapter explains the fundamental seismological mechanisms seismicity of the island of Hawaii and the for earthquakes in Hawaii,which is unlike continental seismology. seismic hazard analysis basis for the The M6.7 October 15,2006 Kiholo Bay earthquake is described, Uniform Building Code(now particularly its effects on the Kawaihae Harbor. The modern discountinued). seismic hazard analysis used for the basis for the International Building Code is explained. A new study to map soil conditions affecting seismic ground motion is included. Structural vulnerabilities of Hawaii island construction is addressed in several new analysis of residential and critical facilities. New Enhanced Hawaii Data for the HAZUS MH MR4 model for earthquake loss estimation and planning has been developed. A 1-2 Hawaii County Multi-Hazard Mitigation Plan