CCHE1D is a software package for the simulation of one-dimensional unsteady flows and sediment transport in dendritic channel networks.  The package includes the following software:

-        Unsteady flow model, including four types of hydraulic structures (culverts, drop structures, measuring flumes, and bridge crossings).

-        Sediment transport model (non-equilibrium transport of nonuniform sediment mixtures)

-        Graphical user interface, implemented as an Extension to ArcView GIS.

The graphical interface includes the model TOPAZ for generation of channel networks based on digital elevation models (DEM's).  CCHE1D includes functions to import simulation results from the AGNPS watershed model.  However, AGNPS is not included in this package.  Users interested in using AGNPS in conjunction with CCHE1D should download that model from http://www.ars.usda.gov/Research/docs.htm?docid=5199.

Software Limitations:

The current release version is 3.0.3.  The software imposes a maximum limit of channel network elements such as channel links and computational nodes. Current limitations are as follows:

Computer Requirements:

The CCHE1D package requires ArcView GIS, version 3.x.  CCHE1D does not work with ArcView versions 8.x or 9.x.  You must have ArcView installed on your computer before attempting to install CCHE1D. Users should also install appropriate patches and upgrades to solve known ArcView problems, before installing CCHE1D.  ArcView software patches are available from http://www.esri.com.

CCHE1D works with any version of Microsoft Windows (32-bit).  The main requirements are:

-         Memory: 256MB required (512 MB recommended).

-         CPU:  Intel, AMD or compatible, 1GHz, or faster.

-         Hard-drive: 40MB for installation of CCHE1D.

CCHE1D has been programmed in Fortran and C/C++.  The program has been compiled with Microsoft Visual Studio 6.0 and Compaq Visual Fortran 6.6.  The graphical interface has been programmed in Avenue, with auxiliary programs written in Fortran 90 and C.