STEPL

Spreadsheet Tool for Estimating Pollutant Load

Spreadsheet Tool for Estimating Pollutant Load (STEPL) is a model capable of simulating nutrient and sediment loads from different land uses as well as the pollutant load reductions from the implementation of best management practices (BMP).

Developer
EPA
Model Information
For more information about this model, go to it.tetratech-ffx.com
Spatial Resolution
Sources of pollution can be on the order of feet.
Temporal Resolution
The timestep is in years
Outputs
STEPL computes watershed surface runoff; nutrient loads, including nitrogen, phosphorus, and 5-day biological oxygen demand (BOD5); and sediment delivery based on various land uses and management practices.
Intended User
practitioner
Model Type
urban development
Inclusion of Climate Change
Climate conditions are not explicitly incorporated.
Geographic Region
generalized
Data Requirements
data provided by user
Source Code Availability
open source
Dimensions
2d
Computational Burden
low
Scenario Modeling
batch mode likely
Coding Language
excel
Operating System
windows
Mathematical Approach
optimization
Maintenance Plan
maintained
Date of Last Known Update
15-Mar-18
User Manual
go to documentation at it.tetratech-ffx.com