Software
CHEMMAP™
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Chemical Discharge Model System
More on this software
CHEMMAP is a chemical discharge model designed to predict the trajectory, fate, impacts and biological effects of a wide variety of chemical substances three-dimensionally.
Applications for CHEMMAP
- Impact Assessment
- Hindcast/forecast of spill response
- Natural resource damage assessment
- Contingency planning - including worst-case scenario
- Evaluation of point source discharges
- Cost-benefit analysis
- Drills and education
Features
- Contains ASA’s own GIS or can be used in other GIS software such as ArcView®
- Location specific environmental/ biological data applied to any fresh or salt aquatic environment in the world
- Can utilize a variety of hydrodynamic file formats
- Easily interpreted visual displays of concentrations over time
- 3D Viewer capabilities
- Biological exposure model to predict exposed fi sh and wildlife impacts
- MSDS database linked to the physical-chemical database
- Extensive chemical database providing physical-chemical data
CHEMMAP Highlights
- Chemical Fates Model
- Biological Exposure and Effects Model
- Stochastic Model
- Hazard Quotient Calculations
- Interactive GIS
- Environmental, Chemical & Biological Databases
Model Modules
Chemical Fates Model
- Initial plume dynamics
- Slick spreading, transport, and entrainment of floating materials
- Evaporation and volatilization (to atmosphere)
- Transport and dispersion of dissolved and particulate materials in the water column and in the atmosphere
- Dissolution and adsorption to suspended sediments
- Sedimentation and resuspension
- Natural degradation
- Shoreline entrainment
- Boom and dispersant effectiveness
CHEMMAP simulates the following processes:
CHEMMAP Hazard Quotient
For all CHEMMAP model options the Hazard Quotients also known as Predicted Effects Concentrations divided by Predicted No Effects Concentration (PEC/PNEC) can be readily calculated.
Biological Exposure and Effects Model
- Area or water volume exposed above a selected threshold (i.e. a toxicological endpoint in US EPA ecological risk assessment terminology)
- Dose (sum of concentration times time of exposure) aquatic biota are exposed to and the expected percent mortality from acute toxic effects
- Direct-contact impacts to birds, mammals, and other wildlife
The biological exposure model evaluates:
Stochastic Model
- Range of expected contamination and the probability of exceeding thresholds of concern from a chemical discharge
- Frequency distribution of model results, for which statistics are calculated and plotted
The stochastic model predicts:
Environmental, Chemical and Biological Databases
- Environmental database - includes coastline, bathymetry, shoreline type, ecological habitat type, and temporally varying ice coverage, temperature, and salinity
- Chemical database - includes physical-chemical parameters that allow the user to add new chemicals, duplicate chemicals already in the database and make changes to chemical data while preserving the original values. There is a link to ChemWatch Chemical Management System’s comprehensive Health and Safety information
- Biological databases - can be set up for any area of the world. For the US, ASA has developed a biological database containing seasonal or monthly mean abundance by species and habitat type for each biogeographic region of the US