Model:OTIS

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OTIS

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Summary Contact Technical specs In/Output Process Testing Other Component info Also known as Model type Single Model part of larger framework Note on status model Date note status model Spatial dimensions 1D Spatial extent Watershed-Scale, Reach-Scale Model domain 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. Keywords: biogeochemistry, water quality, Name Rob Runkel Type of contact Model developer Institute / Organization USGS Postal address 1 Postal address 2 Town / City Boulder Postal code 80303 State Colorado Country United States Email address runkel@usgs.gov Phone Fax Supported platforms Unix, Linux, Windows Other platform macOS Programming language Fortran77 Other program language Code optimized Single Processor Multiple processors implemented Nr of distributed processors Nr of shared processors Start year development 1990 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://water.usgs.gov/software/OTIS/ Source csdms web address Program license type Other Program license type other http://water.usgs.gov/software/help/notice/ Memory requirements Typical run time Describe input parameters see user documentation on website Input format ASCII Other input format Describe output parameters solute concentrations as a function of time and space at user-defined locations within the modeled stream system Output format ASCII Other output format 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 If above answer is yes Other visualization software 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. Describe length scale and resolution constraints Describe time scale and resolution constraints Describe any numerical limitations and issues Describe available calibration data sets See user documentation available at website Upload calibration data sets if available: Describe available test data sets See user documentation available at website Upload test data sets if available: Describe ideal data for testing See user documentation available at website Do you have current or future plans for collaborating with other researchers? Is there a manual available? Yes Upload manual if available: Media:Wrir98-4018.pdf Model website if any http://water.usgs.gov/software/OTIS/ Model forum / discussion board Comments This part will be filled out by CSDMS staff OpenMI compliant No but possible BMI compliant No but possible WMT component No but possible PyMT component Is this a data component Can be coupled with:

Model info Authors Rob Runkel Source code Go to external source code site Model citations Nr. of publications: 88 Total citations: 5728 h-index: 37 m-quotient: 0.97 QR-code Link to this page Other models by author LOADEST OTEQ OTIS

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Nr. of publications:	88
Total citations:	5728
h-index:	37
m-quotient:	0.97

Publication(s)	Year	Type	Cited
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