Water Resources of the United States
Selection of the following options preceded by a binary icon retrieves a compressed UNIX tar file. A README file containing installation instructions is included with each of the software distribution files.
The Free Software Foundation's gunzip is
  necessary to uncompress the UNIX tar files available below.
  However, some World Wide Web browsers automatically uncompress
  retrieved files. Thus, running gunzip as stated in
  the installation instructions may be unnecessary.
Lumb, A.M., Carsel, R.F., and Kittle, J.L., Jr., 1988, Data management for water-quality modeling development and use: Proceedings of the International Conference on Interactive Information and Processing Systems for Meteorology, Oceanography, and Hydrology
Point of contact for LIB:
U.S. Geological Survey Hydrologic Analysis Software Support Program