FIELD TESTING AND EVALUATION OF DUST DEPOSITION AND ...

TABLE OF CONTENTS
1. INTRODUCTION 1-1
1.1 Background 1-1
1.2 Objectives 1-1
1.3 Approach 1-1
1.4 Report Organization 1-2
2. BACKGROUND 2-1
2.1 Dry Deposition 2-2
2.1.1 The Model of Slinn (1982) 2-4
2.1.2 Dry Deposition in the ISC3 2-12
2.1.3 The Model of Raupach (1999) 2-13
2.2 Dispersion in the atmosphere 2-14
3. MEASUREMENT OF DEPOSTION VELOCITY 3-1
3.1 Methods 3-1
3.1.1 Deposition on Flat Substrates 3-1
3.1.2 Deposition on Artificial Vegetation 3-4
3.1.3 Flat Substrate Method Testing 3-5
3.1.4 Vegetative Method Testing 3-5
3.2 Results: Deposition velocities measured by SEM and gravimetric techniques
3-6
3.3 Discussion 3-11
3.3.1 Comparison of results with the model of Slinn (1982) 3-11
3.3.2 Results in the context of the resistance model for deposition 3-13
3.4 Conclusions 3-14
4. MODELS USED TO STUDY PARTICLE REMOVAL BY DRY DEPOSITION
DOWNWIND OF AN UNPAVED ROAD 4-1
4.1 Presentation of Models 4-1
4.1.1 The one-dimensional Atmospheric Diffusion Equation (ADE) 4-1
4.1.2 The Integrated Source Complex Model 3 (ISC3) 4-4
4.1.3 The Gillette Box Model This section of the text was provided by Dr. Dale
Gillette (NOAA) with some minor adjustments by DRI 4-6
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