English Abstract A library of C++ classes has been developed to be used
in environmental modeling applications. The classes are designed to be
generally used. Therefore this report includes a reference manual of the
classes and an elaborated example of the use of the classes. It is
concluded that the classes can be used for a wide range of applications. In
creating this class library two phases were distinguished: (1) design and
(2) implementation. It is concluded that by developing models in an object
oriented way, modelers and programmers are offered the opportunity to
concentrate on their specialisations.
