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Model:QUAL2K
From CSDMS
Revision as of 13:47, 21 June 2011 by
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Contact
Summary
Technical specs
In/Output
Process
Testing
Other
Component info
Name
Steve Chapra
Type of contact
Model developer
Institute / Organization
Tufts University, Civil and Environmental Engineering Dept.
Postal address 1
200 College Avenue
Postal address 2
Town / City
Medford
Postal code
02155
State
Massachusetts
Country
USA
"USA" is not in the list (Afghanistan, Albania, Algeria, Andorra, Angola, Antigua and Barbuda, Argentina, Armenia, Australia, Austria, ...) of
allowed values
for the "Country" property.
Email address
Steven.Chapra@tufts.edu
Phone
Fax
Name
Greg Pelletier
Type of contact
Model developer
Institute / Organization
Postal address 1
Postal address 2
Town / City
Postal code
State
Country
Email address
Phone
Fax
Name
Hua Tao
Type of contact
Model developer
Institute / Organization
Postal address 1
Postal address 2
Town / City
Postal code
State
Country
Email address
Phone
Fax
Edit Model information
QUAL2K
Metadata
Also known as
Model type
Single
Model part of larger framework
Note on status model
Date note status model
biogeochemistry,
water quality,
Supported platforms
Windows
Other platform
Programming language
Fortran90
Other program language
Visual Basic (VBA), Excel
Code optimized
Single Processor
Multiple processors implemented
Nr of distributed processors
Nr of shared processors
Start year development
1987
Does model development still take place?
Yes
If above answer is no, provide end year model development
Code development status
When did you indicate the 'code development status'?
Model availability
As code
Source code availability
(Or provide future intension)
Through web repository
Source web address
http://www.epa.gov/athens/wwqtsc/html/qual2k.html
Source csdms web address
Program license type
Other
Program license type other
NOT SURE
Memory requirements
--
Typical run time
--
Describe input parameters
Too many to mention here
Input format
Other input format
Describe output parameters
--
Output format
Other output format
Pre-processing software needed?
No
Describe pre-processing software
Post-processing software needed?
No
Describe post-processing software
Visualization software needed?
No
If above answer is yes
Other visualization software
Describe processes represented by the model
The QUAL2K framework includes the following new elements:
Software Environment and Interface. Q2K is implemented within the Microsoft Windows environment. Numerical computations are programmed in Fortran 90. Excel is used as the graphical user interface. All interface operations are programmed in the Microsoft Office macro language: Visual Basic for Applications (VBA).
Model segmentation. Q2E segments the system into river reaches comprised of equally spaced elements. Q2K also divides the system into reaches and elements. However, in contrast to Q2E, the element size for Q2K can vary from reach to reach. In addition, multiple loadings and withdrawals can be input to any element.
Carbonaceous BOD speciation. Q2K uses two forms of carbonaceous BOD to represent organic carbon. These forms are a slowly oxidizing form (slow CBOD) and a rapidly oxidizing form (fast CBOD).
Anoxia. Q2K accommodates anoxia by reducing oxidation reactions to zero at low oxygen levels. In addition, denitrification is modeled as a first-order reaction that becomes pronounced at low oxygen concentrations.
Sediment-water interactions. Sediment-water fluxes of dissolved oxygen and nutrients can be simulated internally rather than being prescribed. That is, oxygen (SOD) and nutrient fluxes are simulated as a function of settling particulate organic matter, reactions within the sediments, and the concentrations of soluble forms in the overlying waters.
Bottom algae. The model explicitly simulates attached bottom algae. These algae have variable stoichiometry.
Light extinction. Light extinction is calculated as a function of algae, detritus and inorganic solids.
pH. Both alkalinity and total inorganic carbon are simulated. The river’s pH is then computed based on these two quantities.
Pathogens. A generic pathogen is simulated. Pathogen removal is determined as a function of temperature, light, and settling.
Reach specific kinetic parameters. Q2K allows you to specify many of the *Weirs and waterfalls. The hydraulics of weirs as well as the effect of weirs and waterfalls on gas transfer are explicitly included.
Describe key physical parameters and equations
Too many to mention here. See manual.
Describe length scale and resolution constraints
--
Describe time scale and resolution constraints
--
Describe any numerical limitations and issues
--
Describe available calibration data sets
--
Upload calibration data sets if available:
Describe available test data sets
--
Upload test data sets if available:
Describe ideal data for testing
--
Do you have current or future plans for collaborating with other researchers?
--
Is there a manual available?
Yes
Upload manual if available:
Media:Q2KDocv2 11b8.pdf
Model website if any
http://www.epa.gov/athens/wwqtsc/html/qual2k.html
Model forum / discussion board
Comments
Questionnaire is filled out by Albert Kettner
This part will be filled out by CSDMS staff
OpenMI compliant
No not possible
BMI compliant
No not possible
WMT component
Not yet
"Not yet" is not in the list (Yes, In progress, No but possible, No not possible) of
allowed values
for the "Code CMT compliant or not" property.
PyMT component
Is this a data component
Model info
Authors
Steve Chapra
Pelletier, Tao
Source code
Go to external source code site
Model citations
Nr. of publications:
115
Total citations:
1283
h-index:
18
m-quotient:
0.82
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QUAL2K
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