FIELD TESTING AND EVALUATION OF DUST DEPOSITION AND ...

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1E+01 Fs = 1%; As = 10 microns; AL=1 mm Fs = 0.1%; As = 10 microns; AL= 1 mm 1E+00 Fs = 1%; As = 10 microns; AL=0.5 mm vd (cm/s) 1E-01 1E-02 1E-03 1E-01 1E+00 1E+01 1E+02 Dp (microns) a. 1E+01 1E+00 b=1 b=2 b=4 vd (cm/s) 1E-01 1E-02 1E-03 1E-01 1E+00 1E+01 1E+02 Dp (microns) b. 1E+01 1E+00 cv/cd=0.25 cv/cd=0.33 cv/cd =0.45 vd (cm/s) 1E-01 1E-02 1E-03 1E-01 1E+00 1E+01 1E+02 Dp (microns) c. Figure 2-5. Variation of Slinn (1982) deposition velocity with estimated parameters. a. with assumed length scales of vegetation; b. with assumed rebound coefficient b; c. with assumed viscous to total drag ratio c v /c d . See Table 2-1 for base case. 2-10
1E+01 1E+00 z0 = 4.4 cm z0 = 6.4 cm z0 = 8.4 cm vd (cm/s) 1E-01 1E-02 1E-03 1E-01 1E+00 1E+01 1E+02 Dp (microns) a. 1E+01 1E+00 u* = 0.2 m/s u* = 0.25 m/s u* = 0.3 m/s vd (cm/s) 1E-01 1E-02 1E-03 1E-01 1E+00 1E+01 1E+02 Dp (microns) b. 1E+01 1E+00 l = 0.15 h l = 0.2 h l = 0.3 h vd (cm/s) 1E-01 1E-02 1E-03 1E-01 1E+00 1E+01 1E+02 Dp (microns) c. Figure 2-6. Variation of Slinn (1982) deposition velocity with wind conditions that obey a logarithmic profile as in Equation 2-9. a. with roughness height z 0 while u * and d held constant; b. with friction velocity u * while z 0 and d held constant c. with assumed fraction of canopy height equal to turbulence scale at the top of the canopy while u * and z 0 held constant. See Table 2-1 for base case 2-11
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: Table 2-1. Parameters used in the S
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 and 44: Table 3-2. Log of all flat substrat
Page 45 and 46: 16 Normalized Deposition Velocity 1
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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FIELD TESTING AND EVALUATION OF DUST DEPOSITION AND ...

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