Outputs

The basic output for WEPS1.0 is arranged in a 'spreadsheet' fashion. The columns of output have the following information.

Period End - This column contains the date of the last day for which the row information is reported. Items in that row represent values from the previous period end to the current date.

Operation - This column contains the management operation which occurred on the specified date.

Field Loss

Average Total - This column contains the total soil loss for the period, averaged across the field grid points as well as averaged over the number of simulation years in each rotation year.

Standard Deviation - This column contains the standard deviation of the values in the average total column.

Average Susp. - This column contains the total suspension loss for the period, averaged across the field grid points as well as averaged over the number of simulation years in each rotation year.

Average PM10 - This column contains the PM10 soil loss for the period, averaged across the field grid points as well as averaged over the number of simulation years in each rotation year.

Mass passing Field Boundary

Creep and Saltation - These columns (1, 2, 3, 4) contain the mass per unit length (meter) of creep and saltation size material which passed each field boundary.

Suspension - These columns (1, 2, 3, 4) contain the mass per unit length (meter) of suspension size material which passed each field boundary.

PM10 - These columns (1, 2, 3, 4) contain the mass per unit length (meter) of PM10 size material which passed each field boundary.

Weather

Avg. Total Precip. - This column contains the total precipitation for the period averaged over the simulation years in each rotation year.

Avg. Wind Energy - This column contains the wind energy for the period for winds greater than 8 m/s, averaged over the simulation years in each rotation year.

Dryness Index - This column contains the dryness index for the period averaged over the simulation years in each rotation year. The dryness index is calculated as the net radiation divided by the product of the precipitation and the latent heat of vaporization. It is a measure of the dryness of the soil surface with higher values indicating a drier surface.

Avg. Surface Conditions at Period End

Biomass

Flat Cover - These columns contain the amount of flat live and dead cover on the soil surface expresses as both percent and mass per area basis. These are values at the period end averaged over the simulation years in each rotation year.

Standing Silhouette - These columns contain the standing silhouette area index of live and dead plants expressed both on a percent and mass basis. These values are the standing silhouette area per area of soil surface. These are values at the period end averaged over the simulation years in each rotation year.

Roughness

Oriented Ridge Spacing - This column contains the spacing between ridges. This is the value at the period end averaged over the simulation years in each rotation year.

Oriented Ridge Height - This column contains the height of ridges. This is the value at the period end averaged over the simulation years in each rotation year.

Random Roughness - This column contains the standard deviation of the soil surface random roughness. This is the value at the period end averaged over the simulation years in each rotation year.

The rows in the output form vary depending on the number of rotation years and the number of management operations in each rotation year.

The first sets of rows contain values based on number of rotation years with one set of rows for each rotation year. Each rotation year has output at each management operation date as well as the last day of each month. This output allows the user to view the erosion and other output on a rotation year basis. At the end of each rotation year is a row which contains the average annual value for the rotation year.

The last set of rows contain values output at the end of each month regardless of the rotation year. This output allows the user to view average values on a monthly basis for the entire simulation.

The last row in the output form contains the average annual values for the simulation run.