Affiliations: CCAS, F18410, Brinon, France | Institute of Applied Ecology, Chinese Academy of
Sciences, Shenyang 110015, China. E-mail:[email protected]
Abstract: The paper discusses mainly about the modelling process and related
problems with examples from Chinese and French cases. Five practical problems
must be solved for modelling the functioning of any landscape: (1) The field
data are necessarily taken with a sampling procedure that implies a spatial
(and often temporal) scale. (2) Every landscape modelled has to be identified,
delimited and characterised before application of the hierarchical theory. (3)
The functioning of a landscape involves data of multiple types (climate, soil,
vegetation, fauna, buildings,communications, economy, aesthetics, etc.) which
must be integrated in a holistic approach. (4) Every landscape is spatially
heterogeneous, and the structure of the model must be more or less isomorphic
with its heterogeneity. (5) The evolution of the landscape must be modelled on
a rather long period of time. For all these reasons, it is necessary to build
ad hoc models. Object-oriented computing languages may be useful for this
purpose.