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MS-DOS |
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v1.01 |
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Nov. 1998 |
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Yes (PDF) |
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USEPA |
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The Hydrodynamic, Sediment, and Contaminant Transport Model
(HSCTM2D) is a finite element modeling system for simulating
two-dimensional, vertically-integrated, surface water flow
(typically riverine or estuarine hydrodynamics), sediment
transport, and contaminant transport.
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The modeling system consists of two modules, one for
hydrodynamic modeling (HYDRO2D) and the other for sediment
and contaminant transport modeling (CS2D).
HYDRO2D solves the equations of motion and continuity
for nodal depth-averaged horizontal velocity components
and flow depths. The effects of bottom, internal and
surface shear stresses, horizontal salinity gradients,
and the Coriolis force are represented in the equations
of motion.
CS2D solves the advection-dispersion equation for nodal
vertically-integrated concentrations of suspended sediment,
dissolved and sorbed contaminants, and bed surface elevations.
The processes of dispersion, aggregation, erosion,
deposition, adsorption and desorption are simulated.
A layered bed model is used in simulating bed formation and
subsequent erosion. Sediment bed structure (density and shear
strength profiles, thickness and elevation), net change
in bed elevation and net vertical mass flux of sediment over
an interval of time (e.g., over a certain number of tidal
cycles), average amount of time sediment particles are in suspension, and
the downward flux of sediment onto the bed are calculated for each element.
HSCTM-2D can be run in an uncoupled or semi-coupled mode.
In the uncoupled mode, HYDRO2D is run separately from CS2D.
In the semi-coupled mode, HYDRO2D and CS2D are run in the
following fashion. First, HYDRO2D calculates the flow field
for the current time step. Second, the predicted flow field is
used in CS2D to calculate the transport of sediments and
contaminants during the same time step. HYDRO2D is run at
every time step to update the flow field to account for predicted
changes in nodal flow depths due to erosion and deposition.
In addition, HSCTM-2D has a default option that will allow
the user to make relative comparisons between sites or
designs with limited data. To obtain a quantitative
analysis, the user must run the non-default option with
a complete set of data.
The HSCTM2D modeling system may be used to simulate both
short term (less than 1 year) and long term scour and/or
sedimentation rates and contaminant transport and fate in
vertically well mixed bodies of water.
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| File |
Size |
Download |
| HSCTM2D installation program and dataset |
8.84MB |
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| HSCTM2D installation image and data set, zipped
-- Use this if you have a difficulty with EPA's
installation program |
7.13MB |
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| HSCTM2D User Manual (PDF format) |
1.13MB |
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