Basic Program Format

Figure 1.1 Flowchart of the FASST Modules

Chapter 2 Shortwave (Solar) Radiation Model

Downwelling Shortwave Radiation-continue

Sloping Surface

Shortwave Solar Flux Model Validation

Figure 2.2 Same as Figure 2.1 but for the direct component of the solar flux

Figure 2.3 Same as Figure 2.1 but for the diffuse solar flux

Table 2.6.1 Equation of fit (forced through the origin) and correlation coefficient for Grayling I

Table 2.6.2 Equation of fit (forced through the origin) and correlation coefficient for Yuma

Figure 2.7 Calculated minus the measured total solar flux for different cloud conditions for Yuma

Figure 2.9 Calculated minus the measured total solar flux for different cloud conditions for Grayling II

Module Input and Output

Chapter 3 Longwave (IR) Radiation Model

Table 3.1.0 Coefficients for determining cloud base altitude (meters)

Modification of the Cloud Irradiance Factor (CIF)

Downwelling Infrared Flux Model Validation

Figure 3.3 Comparison of the measured and model calculated downwelling longwave flux

Table 3.2.1 Grayling I average downwelling IR flux for different cloud conditions

Figure 3.5 Comparison of the measured and model calculated downwelling longwave flux

Table 3.2.2 Yuma average downwelling IR flux for different cloud conditions

Table 3.2.3 Grayling II average downwelling IR flux for different cloud conditions

Potential Modification

Model Input and Output

References - SR04-10045

References-continue - SR04-10046

Chapter 4 Soil Temperature Model

Solar Radiation - SR04-10048

Longwave Radiation

Sensible Heat

Latent Heat

Numerical Solution - SR04-10052

Numerical Solution-continue

Material Properties - SR04-10054

Table 4.3.1 Default Soil Properties

Model Validation - SR04-10056

Figure 4.4 Effect on the results of having initial soil temperature profile data (yes) versus letting the model compute one (no)

Figure 4.5 Sensitivity of the surface temperature to the albedo

Figure 4.7 Comparison of FASST and measured pavement surface temperatures

References-continue - SR04-10060

References-continue - SR04-10061

Chapter 5 Soil Moisture and Strength Models

Numerical Solution - SR04-10063

Hydraulic Parameters

Table 5.1.1 Default Soil Moisture Properties

Figure 5.1 ψ versus θ for Yuma, AZ, sand

Model Validation - SR04-10067

Figure 5.3 Soil moisture comparisons for Grayling, MI, 1992

Figure 5.4 Soil moisture comparisons for Yuma, AZ

Soil Strength - SR04-10070

Table 5.2.1 Default Soil Strength Coefficients

References - SR04-10072

References-continue - SR04-10073

Chapter 6 Ground State Model

Validation

References - SR04-10076

Chapter 7 Snow Accretion, Depletion, and Meltwater Outflow Model

Governing Equations of Flow within the Snow-continue - SR04-10078

Governing Equations of Flow within the Snow-continue - SR04-10079

Governing Equations of Flow within the Snow-continue - SR04-10080

Governing Equations of Flow within the Snow-continue - SR04-10081

Evolution of Parameters

Snow Depth

Refreezing

Surface Energy Balance

Model Validation - SR04-10086

Figure 7.2 Comparison between the measured snow depth and the snow depth calculated by SNTHERM

References - SR04-10088

References-continue - SR04-10089

Chapter 8 Ice Thickness Model

References - SR04-10091

Model Inputs

Meteorological Data-continue

Soil Properties - SR04-10094

Soil Properties-continue

Table 9.2.1 FASST Default Soil Properties

Table 9.2.2 FASST Default Soil Moisture Properties

Site Information

References - SR04-10099

Chapter 10 Model Initialization

Time Step Determination

References - SR04-10102

Chapter 11 Model Outputs

Surface Condition Information-continue

Soil Profile Information

Report Documentation Page - SR04-10106

SR04-1