Model:PIHM

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PIHM

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Summary Contact Technical specs In/Output Process Testing Other Component info Also known as Model type Modular Model part of larger framework Note on status model Date note status model Incorporated models or components: Spatial dimensions Spatial extent Model domain Hydrology One-line model description PIHM is a multiprocess, multi-scale hydrologic model. Extended model description PIHM is a multiprocess, multi-scale hydrologic model where the major hydrological processes are fully coupled using the semi-discrete finite volume method. PIHM is a physical model for surface and groundwater, “tightly-coupled” to a GIS interface. PIHMgis which is open source, platform independent and extensible. The tight coupling between GIS and the model is achieved by developing a shared data-model and hydrologic-model data structure. Keywords: basins, continental, Name Christopher Duffy Type of contact Project manager Institute / Organization Penn State University Postal address 1 212 Sackett Bldg Postal address 2 Civil & Environmental Engineering Town / City University Park Postal code 16802 State Pennsylvania Country United States Email address cxd11@psu.edu Phone +1 814 863-4384 Fax +1 814-863-7304 Name Mukesh Kumar Type of contact Technical contact Institute / Organization Postal address 1 Postal address 2 Town / City Postal code State Country Email address Phone Fax Name Gopal Bhatt Type of contact Technical contact Institute / Organization Postal address 1 Postal address 2 Town / City Postal code State Country Email address Phone Fax Supported platforms Unix, Linux, Mac OS, Windows Other platform Platform independent Programming language C, C++ Other program language Code optimized Multiple processors implemented Nr of distributed processors Nr of shared processors Start year development 2002 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://sourceforge.net/projects/pihmmodel/ Source csdms web address Program license type GPL v2 Program license type other Memory requirements -- Typical run time -- Describe input parameters PIHM is an integrated finite volume hydrologic model. It simulates channel routing, overland flow and groundwater flow in fully coupled scheme. It uses semi-discrete Finite Volume approach to discretize PDE (equations governing physical processes) into ODE to form a system of ODEs and solved with SUNDIALS solver (LBL). PIHM incorporates an object-oriented model data structure which provides extensibility and efficient storage of data at the same time. PIHM v2.0 requires the following input files: projectName.txt : This file will have the project name as its content. .mesh File : Spatial information of Nodes and Irregular Meshes (TINs) .att File : Attribute defining different classes an element belongs to .soil File : Soil properties .geol : Geologic properties .lc file : Vegetation parameters of different land cover types .riv file : Spatial, geometry and material information of river segments .forc file : All the forcing variables (forcing time-series) .ibc file : Boundary condition information for elements .para file : Control parameters (solver options; model modes; error control) .init : If initial condition input is through a file .calib : Calibration parameters and process controls Input format ASCII Other input format Shape file Describe output parameters PIHM v2.0 uses Net_CDF for state and flux output. Details are under development (April 2009) and will be complete July 2009 Output format ASCII Other output format NetCDF Pre-processing software needed? No Describe pre-processing software Post-processing software needed? No Describe post-processing software Visualization software needed? Yes If above answer is yes Other visualization software any software able to visualize gridded data (RiverTools / 3DEM) Describe processes represented by the model The Penn State Integrated Hydrologic Model (PIHM) is a fully coupled multiprocess hydrologic model. Instead of coupling through artificial boundary conditions, major hydrological processes are fully coupled by the semi-discrete finite volume approach. For those processes whose governing equations are partial differential equations (PDE), we first discretize in space via the finite volume method. This results in a system of ordinary differential equations (ODE) representing those procesess within the control volume. Within the same control volume, combining other processes whose governing equations are ODE’s, (e.g. the snow accumulation and melt process), a local ODE system is formed for the complete dynamics of the finite volume. Describe key physical parameters and equations Processes include: 2-D overland flow, 2-D groundwater flow, 1-D soil moisture, 1-D channel flow, snow/melt, et, vegetation water use by NLCD, Describe length scale and resolution constraints typically based on original DEM used to develop the watershed model Describe time scale and resolution constraints fully implicit, time adaptive, based on the CVODE ODE solver from LBL Describe any numerical limitations and issues Solver is efficient and accurate for very stiff systems of equations Describe available calibration data sets Upper Juniata River 875 km^2: see: http://sourceforge.net/projects/pihmmodel/ Upload calibration data sets if available: Describe available test data sets Upper Juniata River 875 km^2: see: http://sourceforge.net/projects/pihmmodel/ Upload test data sets if available: Describe ideal data for testing PIHM is a distributed watershed model that can represent surface/subsurface processes at scales ranging from a few hundred m^2 to 10,000 km^2. However, large systems will require the parallel version currently under development Do you have current or future plans for collaborating with other researchers? We have several other extensions to PIHM under development: solute transport, sediment transport, 3-D Richard's Equation. Full information can be found at: http://sourceforge.net/projects/pihmmodel/ Is there a manual available? Yes Upload manual if available: Model website if any http://www.pihm.psu.edu/pihm_home.html 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 Christopher Duffy Kumar, Bhatt Source code Go to external source code site Model citations Nr. of publications: 55 Total citations: 1674 h-index: 25 m-quotient: 1.39 QR-code Link to this page Other models by author PIHM PIHMgis

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Nr. of publications:	55
Total citations:	1674
h-index:	25
m-quotient:	1.39

Featured publication(s)	Year	Model described	Type of Reference	Citations
Qu, Yizhong; Duffy, Christopher J.; 2007. A semidiscrete finite volume formulation for multiprocess watershed simulation: MULTIPROCESS WATERSHED SIMULATION. Water Resources Research, 43, . 10.1029/2006WR005752 (View/edit entry)	2007	PIHM	Model overview	312
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