A Debris Management Handbook for State and Local DOTs and Departments of Public Works (2014) / Chapter Skim
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Pages 14-20
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From page 14... ...
14 C H A P T E R 3 Synopsis of Issues Two primary questions that arise both during the preparation of debris plans and in the implementation of those plans are "How much debris is there? " and "What is the mix of the debris?
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Debris Estimating 15 Historical Analysis. The most basic forecasting model is frequently called an historical analysis.
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16 A Debris Management Handbook for State and Local DOTs and Departments of Public Works VALUES OF "V" VEGETATIVE CHARACTERISTICS MULTIPLIER VEGETATIVE COVER Light Medium Heavy VALUE OF "V" MULTIPLIER 1.1 1.3 1.5 Following the hurricanes of 2005, USACE reviewed the vegetation factor and found it underpredicted vegetation volumes that occurred in a number of more rural counties. It was apparent that basing vegetative debris significantly on population and households missed a key variable.
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From page 17... ...
Debris Estimating 17 to develop mitigation plans post-event but have been applied in several cases to events as they occurred. The HAZUS models develop debris values in tonnage and the model results include debris types that are grouped together; conversion to volume estimation can be challenging.
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From page 18... ...
18 A Debris Management Handbook for State and Local DOTs and Departments of Public Works Following Hurricane Floyd in North Carolina, FEMA conducted an empirical study and developed a slightly different formula associated with a demolished single-family residence: Length Width S 0.20 VCM CY( )
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Debris Estimating 19 Conversion Factor: 1. Debris generated by a wide mobile home = 290 CY.
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20 A Debris Management Handbook for State and Local DOTs and Departments of Public Works Figure 3.2 and the conversion factors for mobile homes were used to initially estimate disasterrelated debris at this mobile home park. Example: In Figure 3.2 above, a review of the aerial photograph indicates that this mobile home park originally held about 160 mobile homes: 52 were totally damaged and 107 were left standing after the tornado.
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