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Model Report

LOADING SIMULATION PROGRAM C

Last Revision Date: 08/25/2009 View as PDF
General Information Back to Top
Model Abbreviated Name:

LSPC
Model Extended Name:

LOADING SIMULATION PROGRAM C
Model Overview/Abstract:
LSPC is the Loading Simulation Program in C++, a watershed modeling system that includes streamlined Hydrologic Simulation Program Fortran (HSPF) algorithms for simulating hydrology, sediment, and general water quality on land as well as a simplified stream transport model. LSPC is derived from the Mining Data Analysis System (MDAS), which was developed by EPA Region 3 and has been widely used for mining applications and TMDLs. A key data management feature of this system is that it uses a Microsoft Access database to manage model data and weather text files for driving the simulation. The system also contains a module to assist in TMDL calculation and source allocations. For each model run, it automatically generates comprehensive text-file output by subwatershed for all land-layers, reaches, and simulated modules, which can be expressed on hourly or daily intervals. Output from LSPC has been linked to other model applications such as EFDC, WASP, and CE-QUAL-W2. LSPC has no inherent limitations in terms of modeling size or model operations. The Microsoft Visual C++ programming architecture allows for seamless integration with modern-day, widely available software such as Microsoft Access and Excel.
Keywords:
Model Technical Contact Information:
Tim Wool
U.S. EPA ORD/NERL-ERD
Watershed and Water Quality Modeling Technical Support Center
Athens, GA
wool.tim@epa.gov 706-355-8312
Model Homepage: http://www.epa.gov/athens/wwqtsc

User Information Back to Top
Technical Requirements
Computer Hardware
Standard Desktop System. Higher performance machine maybe need for large simulations.
Compatible Operating Systems
Microsoft Windows 98 or Higher
Other Software Required to Run the Model
There are seven basic components of the LSPC system. They include: (1) a WCS extension for efficient model setup, (2) an interactive, (3) data management tools, (4) data inventory tools, (5) data analysis tools, (6) a dynamic watershed model tailored for TMDL calculation, and (7) model results analysis. User needs WCS installed to use the extension.
Download Information
The LSPC model is available to be downloadedd.
Using the Model
Basic Model Inputs
Watershed delineations, meteorological data such as: rainfall, air temperature, humidity etc.
Basic Model Outputs
The model provides pollutagraphs (time series of loading data), hydrographs (time series of flow) and impacts of best management practices (BMPs). It is easy to transfer the time series files to other models such as EFDC and WASP.
User Support
User's Guide Available?
Watershed and Water Quality Modeling Technical Support Center maintains a LSPC Users Manual and is included with the installation package. The Users Manual is periodically updated as the model is enhanced.

Model Science Back to Top
Problem Identification
LSPC was designed to handle very large-scale watershed modeling applications. The model has been successfully used to model watershed systems composed of over 1,000 subwatersheds. Using the WCS extension increases the efficiency of model setup and execution by eliminating unnecessary, repetitive user-input, hence minimizes the chance of human error. The system is tailored for source representation and TMDL calculation. The highly adaptable design and programming architecture allows for future modular additions and/or improvements. Furthermore, the entire system is designed to simplify transfer of information between models and users. The LSPC GIS interface, which is compatible with ArcView shapefiles, acts as the control center for launching watershed model scenarios. This stand-alone interface easily communicates with both shapefiles and the Microsoft Access database, but does not directly rely on the main programs. Therefore, once a watershed application is created, it is easily transferable to users who may not have ArcView or MS Access installed on their computers.
Summary of Model Structure and Methods
LSPC is the Loading Simulation Program in C++, a watershed modeling system that includes streamlined Hydrologic Simulation Program Fortran (HSPF) algorithms for simulating hydrology, sediment, and general water quality on land as well as a simplified stream transport model.

Governing equations are solved numerically, both in space and time.

Model Evaluation
The model has been compared against analytical solutions. Simulations have also been compared against same simulations made with HSPF.


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