**1. NAME AND TITLE**

SEDONE: A Simulator of Tidal Transient Hydrodynamic Sediment Concentrations Conditions
in Controlled Rivers and Estuaries.

**2. CONTRIBUTOR**

Oak Ridge National Laboratory, Oak Ridge, Tennessee.

**3. CODING LANGUAGE AND COMPUTER**

Fortran IV; IBM 360/370.

**4. NATURE OF PROBLEM SOLVED**

SEDONE simulates fast-transient, one-dimensional hydrodynamic and three-layer, variable-size
sediment concentration conditions in controlled rivers and tidal estuaries. The mathematical foundation
of the model is based on a one-dimensional, discrete element formulation of the integral forms of the
physical laws for (1) conservation of water mass, (2) second law of motion for water, and (3)
conservation of sediment size-class mass. The model considers discrete-elements enclosed by the
longitudinally divided segments along a river or an estuary and the approximately parallel planes that
bound the three specified layers in the vertical direction consisting of (a) a stationary resident bed
sediment layer, (b) a bed slurry sediment layer and (c) a suspended sediment layer. Different size
classes of sediment with different physical properties can be considered.

**5. METHOD OF SOLUTION**

The governing mathematical model consists of a spatially discretized system of coupled, ordinary
differential equations for water surface elevation and flow rate in the channel and sediment size-class
concentrations in the three layers. These equations are integrated by the Runge-Kutta-Gill integration
scheme from specified initial conditions.

**6. RESTRICTIONS OR LIMITATIONS**

A maximum of four sediment size-classes can be specified because of storage allocation within the
computer code. A channel can be divided into a maximum of 76 discrete elements (77 cross sections),
and a total of 31 time periods are allowed. The code can handle input from five streams that flow into
the main channel. If the user wants to simulate tidal flow, a maximum of eight cosine harmonics for
tidal elevation can be specified.

**7. TYPICAL RUNNING TIME**

The sample problem took 3 minutes to execute on the IBM 360/91.

For a 76-element channel system and a simulation time of 50 hours (with four sediment size-classes), the SEDONE code has an execution time of approximately 5 minutes on the IBM 360/91
computer. However, the code has a user-specified option to include only the simulations of sediment
concentration conditions by incorporating previously computed and stored results for the surface
elevation and flow rate conditions as supplementary input data, thereby excluding the computations for
the solution of the hydrodynamic conditions. This option reduces the computational cost of repeated
simulations which may be required in studies concerned with the comparisons of the sedimentation
conditions for different classes of sediment under similar flow conditions in rivers and estuaries.

**8. COMPUTER HARDWARE REQUIREMENTS**

SEDONE is operable on the IBM 360/370 computers. It requires 238 K storage.

**9. COMPUTER SOFTWARE REQUIREMENTS**

A Fortran H compiler is required. The code uses standard I/O plus 11 additional logical unit
assignments.

**10. REFERENCE**

D. M. Hetrick, A. H. Eraslan, and M. R. Patterson, "SEDONE: A Computer Code for Simulating
Tidal-Transient, One-Dimensional Hydrodynamic Conditions and Three-Layer, Variable-Size Sediment
Concentrations in Controlled Rivers and Estuaries," ORNL/NUREG/TM-256 (February 1979).

**11. CONTENTS OF CODE PACKAGE**

Included are the referenced document and one (1.2MB) DOS diskette which contains the source
codes and sample problem input and output.

**12. DATE OF ABSTRACT**

January 1982.

**KEYWORDS:** RADIONUCLIDES; ONE-DIMENSION; NUCLIDE TRANSPORT; ENVIRONMENTAL DOSE; HYDRODYNAMICS