FIELD TESTING AND EVALUATION OF DUST DEPOSITION AND ...

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Table 3-3. Log of all field vegetative samples Sample ID Date Location Total Run Time Comments (x, y) - m (min) F = Fir C = control F001 04/08/02 5, 1 20 Problem in lab processing 5, 1 52 Unable to open GRIMM data C001 04/08/02 5, 1 52 Unable to open GRIMM data F002 04/12/02 5, 1 460 Deposition velocity result C002 04/12/02 5, 1 460 Deposition velocity result F003 04/17/02 5, 0.75 194 Gravimetric data suspect C003 04/17/02 5, 0.75 194 Gravimetric data suspect F004 04/17/02 50, 0.75 185 04/18/02 50, 0.75 330 I001 04/18/02 5, 0.75 220 Deposition velocity result No GRIMM data for d
16 Normalized Deposition Velocity 11 6 1 -4 -9 NX NY PY NZ PX Direction Figure 3-4. Directional variation in deposition velocity normal to a flat surface. Data given are mean and one standard deviation, normalized by the deposition velocity on the horizontal surface facing up (PZ) averaged for the range 0.5-7.5 m (physical diameter) based on four determinations (SEM 12, 17, 18, 19). The vertical surfaces (NX, NY, PY) show enhanced deposition due to impaction. Deposition on surface facing down (NZ) and away from the road (PX) is presumed to be due to turbulence. 100 Normalized Deposition Velocity 10 1 0.1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Physical Diameter - microns NX NY NZ PX PY PZ Figure 3-5. Directional variation in deposition velocity normal to a flat surface as a function of particle size. Data are the mean of four determinations (SEM 12, 17, 8, 19), normalized by the deposition velocity on the horizontal surface facing up (PZ). The plot indicates no consistent size dependence for particles less than 10 µm in diameter. 3-9
Page 1: FIELD TESTING AND EVALUATION OF DUS
Page 5 and 6: EXECUTIVE SUMMARY The Western State
Page 7 and 8: models. Countess (2001) summarized
Page 9 and 10: TABLE OF CONTENTS 1. INTRODUCTION 1
Page 11 and 12: TABLE OF FIGURES Figure 2-1. Develo
Page 13 and 14: Figure 4-6. The fraction of particl
Page 15 and 16: Figure 5-16. Comparison of fraction
Page 17 and 18: LIST OF TABLES Table 2-1. Parameter
Page 19 and 20: 1. INTRODUCTION 1.1 Background The
Page 21 and 22: 2.BACKGROUND Fugitive dust is emitt
Page 23 and 24: Planetary Boundary Layer (PBL) F =
Page 25 and 26: C D u* = ur The overall drag c
Page 27 and 28: St a vg u g = cA L * Equation 2
Page 29 and 30: Table 2-1. Parameters used in the S
Page 31 and 32: 1E+01 1E+00 z0 = 4.4 cm z0 = 6.4 cm
Page 33 and 34: pathway for deposition for particle
Page 35 and 36: An alternative method for modeling
Page 37 and 38: 3. MEASUREMENT OF DEPOSTION VELOCIT
Page 39 and 40: Department at the University of Uta
Page 41 and 42: In the laboratory, the deposited ma
Page 43: Table 3-2. Log of all flat substrat
Page 47 and 48: 1.E+05 Deposition Velocity - cm/s 1
Page 49 and 50: are deposition from a horizontally
Page 51 and 52: single element that is intended to
Page 53 and 54: 4. MODELS USED TO STUDY PARTICLE RE
Page 55 and 56: κu ( ) * z 8 fz K zz = exp −
Page 57 and 58: C = −6 ( 1× 10 ) QV 2π u s σ
Page 59 and 60: oad. M is the mass of particles in
Page 61 and 62: By making the approximation that dm
Page 63 and 64: diameters less than 10 microns. Dis
Page 65 and 66: of such a height is somewhat arbitr
Page 67 and 68: 1 0.9 0.8 1 0.9 0.8 Fraction remain
Page 69 and 70: Fraction of Particles Remaining in
Page 71 and 72: gravitational settling. Stable cond
Page 73 and 74: though it is expected to improve at
Page 75 and 76: 5. DETERMINATION OF PARTICLE REMOVA
Page 77 and 78: PM 10 measured by the DustTrak must
Page 79 and 80: 100% 90% 80% Relative Frequency (pr
Page 81 and 82: average wind speed measured at 12 m
Page 83 and 84: where the subscript i indicates tha
Page 85 and 86: k C int = peakend k C peeakstart d
Page 87 and 88: Height z (m) 14 12 10 8 6 T1_data T
Page 89 and 90: Horizontal fluxes of PM 10 measured
Page 92 and 93: Table 5-2 enumerates the speed-depe
Page 94 and 95:
6 Ratio of AP-42 Emission Factor to
Page 96 and 97:
to the ground) giving an approximat
Page 98 and 99:
models analyzed in this study is su
Page 100 and 101:
Table 6-1. Screen analysis of test
Page 102 and 103:
value which was used up to the midp
Page 104 and 105:
measured at 3,1. Downwind the dust
Page 106 and 107:
trips, the average readings for the
Page 108 and 109:
Fraction of particles of stated siz
Page 110 and 111:
the ground, where particles have a
Page 112 and 113:
particles through the top of the bo
Page 114 and 115:
deposition. Much of the decrease in
Page 116 and 117:
7-8
Page 118 and 119:
Gifford, F.A. (1961). Use of Routin
Page 120:
Venkatram, A. (1993). The Parametri
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