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15:48:35, 10 April 2009 +
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/ +
Upper Juniata River 875 km^2: see: http://sourceforge.net/projects/pihmmodel/ +
Upper Juniata River 875 km^2: see: http://sourceforge.net/projects/pihmmodel/ +
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 +
PIHM is an integrated finite volume hydrol … 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).<br>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:</br>* projectName.txt : This file will have the project name as its content.</br>* .mesh File : Spatial information of Nodes and Irregular Meshes (TINs)</br>* .att File : Attribute defining different classes an element belongs to</br>* .soil File : Soil properties</br>* .geol : Geologic properties</br>* .lc file : Vegetation parameters of different land cover types</br>* .riv file : Spatial, geometry and material information of river segments</br>* .forc file : All the forcing variables (forcing time-series)</br>* .ibc file : Boundary condition information for elements</br>* .para file : Control parameters (solver options; model modes; error control)</br>* .init : If initial condition input is through a file</br>* .calib : Calibration parameters and process controlsib : Calibration parameters and process controls +
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, +
typically based on original DEM used to develop the watershed model +
Solver is efficient and accurate for very stiff systems of equations +
PIHM v2.0 uses Net_CDF for state and flux output. Details are under development (April 2009) and will be complete July 2009 +
The Penn State Integrated Hydrologic 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.he complete dynamics of the finite volume. +
fully implicit, time adaptive, based on the CVODE ODE solver from LBL +
PIHM is a multiprocess, multi-scale hydrol … 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.model and hydrologic-model data structure. +
Christopher +
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ASCII +
Shape file +
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1.37 +
Hydrology +
pihm +, multiprocess +, multi-scale +, model +, finite volume method +, major hydrological processes +, semi-discrete finite volume +, multi-scale hydrologic model +, multi-scale hydrologic +, volume method +, major hydrological +, hydrological processes +, processes are fully +, fully coupled +, semi-discrete finite +, finite volume +, hydrologic model +, gis interface +, basins + and continental +
As code +
Modular +
http://www.pihm.psu.edu/pihm_home.html +
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02:17:59, 17 September 2020 +
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PIHM is a multiprocess, multi-scale hydrologic model. +
ASCII +
NetCDF +
212 Sackett Bldg +
Civil & Environmental Engineering +
16802 +
false +
false +
GPL v2 +
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Through web repository +
http://sourceforge.net/projects/pihmmodel/ +
2002 +
Platform independent +
Project manager +
any software able to visualize gridded data (RiverTools / 3DEM) +
