User's Manual of FLSTAT3D; Pathlines in Quasi-Three-Dimensional Groundwater Flowin a System of Layered Aquifers on the Basis of Stationary Hydraulic Heads

摘要

The freehand method can often be used to draw pathlines based on a given set ofisohypses. However, the method has the disadvantages that different engineers will obtain different results, and that the resulting data are not immediately available for subsequent processing. The document describes the computer program FLSTAT3D (FLow STATionary in 3 Dimensions) which has been designed to calculate the quasi-three-dimensional discontinuous velocity field in a system of coupled anisotropic heterogeneous aquifers, based upon given two-dimensional isohypses for each aquifer, on a regional scale. It is supposed that the Dupuit-Forchheimer assumption is valid. The data as well as the data with respect to the mesh structure are organized in the data storage and retrieval system RDARR. With the post-processing program METROPART it is possible to calculate flow paths starting from a point somewhere in the flow field. The results of the calculations are Cartesian coordinates and travel times along the path lines, in both printable and graphics processable output. The program can be executed on a personal computer running under OS/2, provided there is enough memory available for user applications. If a small number of elements is sufficient, the program can be run under DOS. As the program is written in FORTRAN77 it can be installed on every other computer, provided there is a FORTRAN compiler available. A simple text editor will be sufficient to generate the input file.