CSDMS - User contributions [en]

Model:OTIS

2010-10-15T14:37:02Z

Runkel:

{{Modeler information
|First name=Rob
|Last name=Runkel
|Type of contact=Model developer
|Institute / Organization=USGS
|Town / City=Boulder
|Postal code=80303
|State=Colorado
|Country=USA
|Email address=runkel@usgs.gov
}}
{{Model identity
|Categories=Hydrology, Terrestrial
|Spatial dimensions=1D
|Spatialscale=Watershed-Scale, Reach-Scale
|One-line model description=One-Dimensional Transport with Inflow and Storage (OTIS): A Solute Transport Model for Streams and Rivers
|Extended model description=One-Dimensional Transport with Inflow and Storage (OTIS): A Solute Transport Model for Streams and Rivers

OTIS is a mathematical simulation model used to characterize the fate and transport of water-borne solutes in streams and rivers. The governing equation underlying the model is the advection-dispersion equation with additional terms to account for transient storage, lateral inflow, first-order decay, and sorption. This equation and the associated equations describing transient storage and sorption are solved using a Crank-Nicolson finite-difference solution.

OTIS may be used in conjunction with data from field-scale tracer experiments to quantify the hydrologic parameters affecting solute transport. This application typically involves a trial-and-error approach wherein parameter estimates are adjusted to obtain an acceptable match between simulated and observed tracer concentrations. Additional applications include analyses of nonconservative solutes that are subject to sorption processes or first-order decay. OTIS-P, a modified version of OTIS, couples the solution of the governing equation with a nonlinear regression package. OTIS-P determines an optimal set of parameter estimates that minimize the squared differences between the simulated and observed concentrations, thereby automating the parameter estimation process.
}}
{{Model technical information
|Supported platforms=Unix, Linux, Windows
|Programming language=Fortran77
|Code optimized=Single Processor
|Start year development=1990
|Does model development still take place?=Yes
|Model availability=As code, As executable
|Source code availability=Through web repository
|Source web address=http://water.usgs.gov/software/OTIS/
|Program license type=Other
|Program license type other=http://water.usgs.gov/software/help/notice/
|OpenMI compliant=No not possible
|CCA component=No not possible
|IRF interface=No not possible
}}
{{Input - Output description
|Describe input parameters=see user documentation on website
|Input format=ASCII
|Describe output parameters=solute concentrations as a function of time and space at user-defined locations within the modeled stream system
|Output format=ASCII
|Pre-processing software needed?=Yes
|Describe pre-processing software=OTIS relies on flat ASCII (text) files for input and output. At present, a graphical user interface for comprehensive management of OTIS input and output is not available. OTIS input files have traditionally been developed on the user's local computer system using a text-based editor. As an alternative, users may fill out the web-based forms available via the Generate Input section of http://water.usgs.gov/software/OTIS/. After providing the required information, users can download the resultant input files and run OTIS in the usual manner.
|Post-processing software needed?=Yes
|Describe post-processing software=All output is written to flat ASCII files. OTIS output files are usually read into a spreadsheet or graphics program for plotting and analysis.

|Visualization software needed?=No
}}
{{Process description model
|Describe processes represented by the model=Advection, Dispersion, Inflow, and Transient Storage. First-order loss/production, sorption.
|Describe key physical parameters and equations=Instream mass transport based on the Advection-Dispersion equation with additional terms to consider inflow, transient storage, and chemical transformation.
}}
{{Model testing
|Describe available calibration data sets=See user documentation available at website
|Describe available test data sets=See user documentation available at website
|Describe ideal data for testing=See user documentation available at website
}}
{{Users groups model}}
{{Documentation model
|Provide key papers on model if any=see user documentation and website
|Manual model available=Yes
|Model manual=Wrir98-4018.pdf,
|Model website if any=http://water.usgs.gov/software/OTIS/
}}
{{Additional comments model}}

==Introduction==

== History ==

== Papers ==

== Issues ==

== Help ==

== Input Files ==

== Output Files ==

== Download ==

== Source ==

Model:OTEQ

2010-05-12T18:10:19Z

Runkel:

{{Modeler information
|First name=Rob
|Last name=Runkel
|Type of contact=Model developer
|Institute / Organization=USGS
|Town / City=Boulder
|Postal code=80303
|State=Colorado
|Country=USA
|Email address=runkel@usgs.gov
}}
{{Model identity
|Model type=Single
|Categories=Hydrology, Terrestrial
|Spatial dimensions=1D
|Spatialscale=Watershed-Scale, Reach-Scale
|One-line model description=One-Dimensional Transport with Equilibrium Chemistry (OTEQ):
A Reactive Transport Model for Streams and Rivers
|Extended model description=One-Dimensional Transport with Equilibrium Chemistry (OTEQ):
A Reactive Transport Model for Streams and Rivers

OTEQ is a mathematical simulation model used to characterize the fate and transport of waterborne solutes in streams and rivers. The model is formed by coupling a solute transport model with a chemical equilibrium submodel. The solute transport model is based on OTIS, a model that considers the physical processes of advection, dispersion, lateral inflow, and transient storage. The equilibrium submodel is based on MINTEQ, a model that considers the speciation and complexation of aqueous species, acid-base reactions, precipitation/dissolution, and sorption.

Within OTEQ, reactions in the water column may result in the formation of solid phases (precipitates and sorbed species) that are subject to downstream transport and settling processes. Solid phases on the streambed may also interact with the water column through dissolution and sorption/desorption reactions. Consideration of both mobile (waterborne) and immobile (streambed) solid phases requires a unique set of governing differential equations and solution techniques that are developed herein. The partial differential equations describing physical transport and the algebraic equations describing chemical equilibria are coupled using the sequential iteration approach. The model's ability to simulate pH, precipitation/dissolution, and pH-dependent sorption provides a means of evaluating the complex interactions between instream chemistry and hydrologic transport at the field scale.

OTEQ is generally applicable to solutes which undergo reactions that are sufficiently fast relative to hydrologic processes ("Local Equilibrium"). Although the definition of "sufficiently fast" is highly solute and application dependent, many reactions involving inorganic solutes quickly reach a state of chemical equilibrium. Given a state of chemical equilibrium, inorganic solutes may be modeled using OTEQ's equilibrium approach. This equilibrium approach is facilitated through the use of an existing database that describes chemical equilibria for a wide range of inorganic solutes. In addition, solute reactions not included in the existing database may be added by defining the appropriate mass-action equations and the associated equilibrium constants. As such, OTEQ provides a general framework for the modeling of solutes under the assumption of chemical equilibrium. Despite this generality, most OTEQ applications to date have focused on the transport of metals in streams and small rivers. The OTEQ documentation is therefore focused on metal transport. Potential model users should note, however, that additional applications are possible.
}}
{{Model technical information
|Supported platforms=Unix, Linux
|Programming language=Fortran77
|Code optimized=Single Processor
|Start year development=1991
|Does model development still take place?=Yes
|Model availability=As code, As executable
|Source code availability=Through web repository
|Source web address=http://water.usgs.gov/software/OTEQ/
|Program license type=Other
|Program license type other=http://water.usgs.gov/software/help/notice/
|OpenMI compliant=No not possible
|CCA component=No not possible
|IRF interface=No not possible
}}
{{Input - Output description
|Describe input parameters=see user documentation
|Input format=ASCII
|Describe output parameters=Solute concentrations as a function of space and time
|Output format=ASCII
|Pre-processing software needed?=Yes
|Describe pre-processing software=All I/O is done with flat ASCII files; The 'MINTEQ Input file' is created using the Proteq utility; remaining input files may be created using a text editor
|Post-processing software needed?=Yes
|Describe post-processing software=All I/O is done with flat ASCII files; Output files are first processed by a utility (posteq) -- resultant files can then be plotted with the user's own software.
|Visualization software needed?=No
}}
{{Process description model
|Describe processes represented by the model=Physical transport: Advection, Dispersion, Inflow, Transient Storage, and Settling.

Chemistry: Precipitation/Dissolution, Sorption/Desorption, Oxidation/Reduction, aqueous complexation, and acid-base reactions
|Describe key physical parameters and equations=Partial differential equations describing mass transport (Advection-Dispersion-Reaction equations) and algebraic equations describing chemical equilibria are coupled using the Sequential Iteration Approach
|Describe any numerical limitations and issues=see numerical aspects described in Section 4 of the documentation
}}
{{Model testing
|Describe available calibration data sets=see user documentation; also see applications at
http://water.usgs.gov/software/OTEQ/apps/
|Describe available test data sets=see user documentation; also see applications at
http://water.usgs.gov/software/OTEQ/apps/
}}
{{Users groups model}}
{{Documentation model
|Provide key papers on model if any=see user documentation; also see applications at
http://water.usgs.gov/software/OTEQ/apps/
|Manual model available=Yes
|Model manual=TM6ChB6.pdf,
|Model website if any=http://water.usgs.gov/software/OTEQ/
}}
{{Additional comments model}}

==Introduction==

== History ==

== Papers ==

== Issues ==

== Help ==

== Input Files ==

== Output Files ==

== Download ==

== Source ==

Model:OTIS

2010-05-12T18:04:26Z

Runkel:

{{Modeler information
|First name=Rob
|Last name=Runkel
|Type of contact=Model developer
|Institute / Organization=USGS
|Town / City=Boulder
|Postal code=80303
|State=Colorado
|Country=USA
|Email address=runkel@usgs.gov
}}
{{Model identity
|Categories=Hydrology, Terrestrial
|Spatial dimensions=1D
|Spatialscale=Watershed-Scale, Reach-Scale
|One-line model description=One-Dimensional Transport with Inflow and Storage (OTIS): A Solute Transport Model for Streams and Rivers
|Extended model description=One-Dimensional Transport with Inflow and Storage (OTIS): A Solute Transport Model for Streams and Rivers

OTIS is a mathematical simulation model used to characterize the fate and transport of water-borne solutes in streams and rivers. The governing equation underlying the model is the advection-dispersion equation with additional terms to account for transient storage, lateral inflow, first-order decay, and sorption. This equation and the associated equations describing transient storage and sorption are solved using a Crank-Nicolson finite-difference solution.

OTIS may be used in conjunction with data from field-scale tracer experiments to quantify the hydrologic parameters affecting solute transport. This application typically involves a trial-and-error approach wherein parameter estimates are adjusted to obtain an acceptable match between simulated and observed tracer concentrations. Additional applications include analyses of nonconservative solutes that are subject to sorption processes or first-order decay. OTIS-P, a modified version of OTIS, couples the solution of the governing equation with a nonlinear regression package. OTIS-P determines an optimal set of parameter estimates that minimize the squared differences between the simulated and observed concentrations, thereby automating the parameter estimation process.
}}
{{Model technical information
|Supported platforms=Unix, Linux, Windows
|Programming language=Fortran77
|Code optimized=Single Processor
|Start year development=1990
|Does model development still take place?=Yes
|Model availability=As code, As executable
|Source code availability=Through web repository
|Source web address=http://co.water.usgs.gov/otis/
|Program license type=Other
|Program license type other=http://water.usgs.gov/software/help/notice/
|OpenMI compliant=No not possible
|CCA component=No not possible
|IRF interface=No not possible
}}
{{Input - Output description
|Describe input parameters=see user documentation on website
|Input format=ASCII
|Describe output parameters=solute concentrations as a function of time and space at user-defined locations within the modeled stream system
|Output format=ASCII
|Pre-processing software needed?=Yes
|Describe pre-processing software=All I/O done with flat ASCII files; users must prepare with text editor
|Post-processing software needed?=Yes
|Describe post-processing software=All I/O done with flat ASCII files; users must process output with plotting software
|Visualization software needed?=No
}}
{{Process description model
|Describe processes represented by the model=Advection, Dispersion, Inflow, and Transient Storage. First-order loss/production, sorption.
|Describe key physical parameters and equations=Instream mass transport based on the Advection-Dispersion equation with additional terms to consider inflow, transient storage, and chemical transformation.
}}
{{Model testing
|Describe available calibration data sets=See user documentation available at website
|Describe available test data sets=See user documentation available at website
|Describe ideal data for testing=See user documentation available at website
}}
{{Users groups model}}
{{Documentation model
|Provide key papers on model if any=see user documentation and website
|Manual model available=Yes
|Model manual=Wrir98-4018.pdf,
|Model website if any=http://co.water.usgs.gov/otis/
}}
{{Additional comments model
|Comments=a new website is currently under construction
}}

==Introduction==

== History ==

== Papers ==

== Issues ==

== Help ==

== Input Files ==

== Output Files ==

== Download ==

== Source ==

Model:OTEQ

2010-05-12T18:01:22Z

Runkel: Created page with '{{Modeler information |First name=Rob |Last name=Runkel |Type of contact=Model developer |Institute / Organization=USGS |Town / City=Boulder |Postal code=80303 |State=Colorado |C…'

{{Modeler information
|First name=Rob
|Last name=Runkel
|Type of contact=Model developer
|Institute / Organization=USGS
|Town / City=Boulder
|Postal code=80303
|State=Colorado
|Country=USA
|Email address=runkel@usgs.gov
}}
{{Model identity
|Model type=Single
|Categories=Hydrology, Terrestrial
|Spatial dimensions=1D
|Spatialscale=Watershed-Scale, Reach-Scale
|One-line model description=One-Dimensional Transport with Equilibrium Chemistry (OTEQ):
A Reactive Transport Model for Streams and Rivers
|Extended model description=One-Dimensional Transport with Equilibrium Chemistry (OTEQ):
A Reactive Transport Model for Streams and Rivers

OTEQ is a mathematical simulation model used to characterize the fate and transport of waterborne solutes in streams and rivers. The model is formed by coupling a solute transport model with a chemical equilibrium submodel. The solute transport model is based on OTIS, a model that considers the physical processes of advection, dispersion, lateral inflow, and transient storage. The equilibrium submodel is based on MINTEQ, a model that considers the speciation and complexation of aqueous species, acid-base reactions, precipitation/dissolution, and sorption.

Within OTEQ, reactions in the water column may result in the formation of solid phases (precipitates and sorbed species) that are subject to downstream transport and settling processes. Solid phases on the streambed may also interact with the water column through dissolution and sorption/desorption reactions. Consideration of both mobile (waterborne) and immobile (streambed) solid phases requires a unique set of governing differential equations and solution techniques that are developed herein. The partial differential equations describing physical transport and the algebraic equations describing chemical equilibria are coupled using the sequential iteration approach. The model's ability to simulate pH, precipitation/dissolution, and pH-dependent sorption provides a means of evaluating the complex interactions between instream chemistry and hydrologic transport at the field scale.

OTEQ is generally applicable to solutes which undergo reactions that are sufficiently fast relative to hydrologic processes ("Local Equilibrium"). Although the definition of "sufficiently fast" is highly solute and application dependent, many reactions involving inorganic solutes quickly reach a state of chemical equilibrium. Given a state of chemical equilibrium, inorganic solutes may be modeled using OTEQ's equilibrium approach. This equilibrium approach is facilitated through the use of an existing database that describes chemical equilibria for a wide range of inorganic solutes. In addition, solute reactions not included in the existing database may be added by defining the appropriate mass-action equations and the associated equilibrium constants. As such, OTEQ provides a general framework for the modeling of solutes under the assumption of chemical equilibrium. Despite this generality, most OTEQ applications to date have focused on the transport of metals in streams and small rivers. The OTEQ documentation is therefore focused on metal transport. Potential model users should note, however, that additional applications are possible.
}}
{{Model technical information
|Supported platforms=Unix, Linux
|Programming language=Fortran77
|Code optimized=Single Processor
|Start year development=1991
|Does model development still take place?=Yes
|Model availability=As code, As executable
|Source code availability=Through web repository
|Source web address=http://water.usgs.gov/software/OTEQ/
|Program license type=Other
|Program license type other=http://water.usgs.gov/software/help/notice/
|OpenMI compliant=No not possible
|CCA component=No not possible
|IRF interface=No not possible
}}
{{Input - Output description
|Describe input parameters=see user documentation
|Input format=ASCII
|Describe output parameters=Solute concentrations as a function of space and time
|Output format=ASCII
|Pre-processing software needed?=Yes
|Describe pre-processing software=All I/O is done with flat ASCII files; The 'MINTEQ Input file' is created using the Proteq utility; remaining input files may be created using a text editor
|Post-processing software needed?=Yes
|Describe post-processing software=All I/O is done with flat ASCII files; Output files are first processed by a utility (posteq) -- resultant files can then be plotted with the user's own software.
|Visualization software needed?=No
}}
{{Process description model
|Describe processes represented by the model=Physical transport: Advection, Dispersion, Inflow, Transient Storage, and Settling.

Chemistry: Precipitation/Dissolution, Sorption/Desorption, Oxidation/Reduction, aqueous complexation, and acid-base reactions
|Describe key physical parameters and equations=Partial differential equations describing mass transport (Advection-Dispersion-Reaction equations) and algebraic equations describing chemical equilibria are coupled using the Sequential Iteration Approach
|Describe any numerical limitations and issues=see numerical aspects described in Section 4 of the documentation
}}
{{Model testing
|Describe available calibration data sets=see user documentation; also see applications at
http://water.usgs.gov/software/OTEQ/apps/
|Describe available test data sets=see user documentation; also see applications at
http://water.usgs.gov/software/OTEQ/apps/
}}
{{Users groups model}}
{{Documentation model
|Provide key papers on model if any=see user documentation; also see applications at
http://water.usgs.gov/software/OTEQ/apps/
|Manual model available=Yes
|Model manual=TM6ChB6.pdf,
|Model website if any=http://water.usgs.gov/software/OTEQ/
}}
{{Additional comments model}}

==Introduction==

== History ==

== Papers ==

== Issues ==

== Help ==

== Input Files ==

== Output Files ==

== Download ==

== Source ==

File:TM6ChB6.pdf

2010-05-12T17:59:43Z

Runkel:

Model:OTIS

2010-05-12T17:42:01Z

Runkel:

Model:LOADEST

2010-05-12T17:40:27Z

Runkel:

{{Modeler information
|First name=Rob
|Last name=Runkel
|Type of contact=Technical contact
|Institute / Organization=U.S. Geological Survey
|Postal address 1=Denver Federal Center
|Town / City=Lakewood
|Postal code=80225
|State=Colorado
|Country=USA
|Email address=runkel@usgs.gov
|Phone=303/236-4882 ext. 285
|Fax=303/236-4912
}}
{{Model identity
|Model type=Single
|Categories=Coastal, Hydrology, Terrestrial
|One-line model description=Software for estimating constituent loads in streams and rivers
|Extended model description=LOAD ESTimator (LOADEST) is a FORTRAN program for estimating constituent loads in streams and rivers. Given a time series of streamflow, additional data variables, and constituent concentration, LOADEST assists the user in developing a regression model for the estimation of constituent load (calibration). Explanatory variables within the regression model include various functions of streamflow, decimal time, and additional user-specified data variables. The formulated regression model then is used to estimate loads over a user-specified time interval (estimation). Mean load estimates, standard errors, and 95 percent confidence intervals are developed on a monthly and(or) seasonal basis.

The calibration and estimation procedures within LOADEST are based on three statistical estimation methods. The first two methods, Adjusted Maximum Likelihood Estimation (AMLE) and Maximum Likelihood Estimation (MLE), are appropriate when the calibration model errors (residuals) are normally distributed. Of the two, AMLE is the method of choice when the calibration data set (time series of streamflow, additional data variables, and concentration) contains censored data. The third method, Least Absolute Deviation (LAD), is an alternative to maximum likelihood estimation when the residuals are not normally distributed. LOADEST output includes diagnostic tests and warnings to assist the user in determining the appropriate estimation method and in interpreting the estimated loads.

The LOADEST software and related materials (data and documentation) are made available by the U.S. Geological Survey (USGS) to be used in the public interest and the advancement of science. You may, without any fee or cost, use, copy, modify, or distribute this software, and any derivative works thereof, and its supporting documentation, subject to the USGS software User's Rights Notice.
}}
{{Model technical information
|Supported platforms=Unix, Linux, Windows
|Programming language=Fortran77
|Code optimized=Single Processor
|Start year development=2001
|Does model development still take place?=No
|End year development=2005
|Model availability=As code
|Source code availability=Through web repository
|Source web address=http://water.usgs.gov/software/loadest/
|Program license type=Other
|Program license type other=U.S. Government software product
|OpenMI compliant=No but possible
|CCA component=No but possible
|IRF interface=No but possible
|Memory requirements=--
|Typical run time=--
}}
{{Input - Output description
|Describe input parameters=Given a time series of streamflow, additional data variables, and constituent concentration, LOADEST assists the user in developing a regression model for the estimation of constituent load (calibration).
|Input format=ASCII
|Describe output parameters=Estimated constituent loads
|Output format=ASCII
|Pre-processing software needed?=No
|Post-processing software needed?=No
|Describe post-processing software=See, http://water.usgs.gov/software/loadest/faq/
|Visualization software needed?=No
}}
{{Process description model
|Describe processes represented by the model=--
|Describe key physical parameters and equations=--
|Describe length scale and resolution constraints=--
|Describe time scale and resolution constraints=--
|Describe any numerical limitations and issues=--
}}
{{Model testing
|Describe available calibration data sets=--
|Describe available test data sets=See applications described in software documentation http://water.usgs.gov/software/loadest/doc/
|Describe ideal data for testing=--
}}
{{Users groups model
|Do you have current or future plans for collaborating with other researchers?=--
}}
{{Documentation model
|Provide key papers on model if any=http://water.usgs.gov/software/loadest/apps/
|Manual model available=Yes
|Model manual=Loadest.pdf
|Model website if any=http://water.usgs.gov/software/loadest/
}}
{{Additional comments model
|Comments=http://water.usgs.gov/software/loadest/
}}
{{Infobox Model
|model name = LOADEST
|developer = '''Runkel''', Robert
|one-line-description = Software for estimating constituent loads in streams and rivers
|type = Model
|source = <linkedimage>wikipage=Model:LOADEST
tooltip=Download LOADEST
img_src=Yellow1.png</linkedimage>
}}


==Introduction==

== History ==

== Papers ==

== Issues ==

== Help ==

== Input Files ==

== Output Files ==

== Download ==

== Source ==

[[Category:Terrestrial]]

Model:OTIS

2010-05-12T17:32:11Z

File:Wrir98-4018.pdf

2010-05-12T17:28:44Z

Runkel:

User:Runkel

2010-05-12T17:09:00Z

Runkel:

{{Signup information member
|First name member=Rob
|Last name member=Runkel
|Institute member=USGS
|City member=Boulder
|Postal code member=80303
|State member=Colorado
|Country member=USA
|Confirm email member=runkel@usgs.gov
|Website member=http://profile.usgs.gov/runkel
}}