Table 2 Model parameters and definitions
From: A model to assess tephra clean-up requirements in urban environments
Variable | Definition |
|---|---|
Bs | Bucket swings |
Tv | Truck volume (m3) |
Bv | Bucket volume (m3). |
Lt | Loading time |
Bc | Bucket cycle time |
Tc | Truck cycle time |
Ht | Hauling time |
Qt | Queuing time |
Ut | Unloading time |
Ft | Fleet hauling time |
Pt | Time from a pickup point to a disposal site |
Hd | Hours per day clean-up works occurs |
T | Duration of clean-up (days) |
Fc | Fleet cycles (Fleet hauling capacity/Volume to transport) |
Nt | Number of dump trucks available for clean-up |
Ns | Number of sweepers available for clean-up |
Dkm | Distance of road required to be cleaned |
Dd | Distance of road cleaned per day |
Lr | Length of road that one sweeper truck can clean per day (km/day) |
Sv | Speed of sweeper truck (km/h) |
Hf | Fraction of each hour spent travelling to and from disposal sites |
E | Efficiency factor (how many times a sweeper needs to pass over a surface to remove 100% of tephra) |
V | Volume of tephra (m3) |
D | Kilometres to a disposal site |