Landscape Function Transformations with Relation to Land-Use Changes - Landscape Modelling: Geographical Space, Transformation and Future Scenarios - page 95

Remarks:
- Every period is characterised by completely different land-use development.
- While in the first period, types where an increase of the arable land had occurred
(most often in combination with an increase of permanent cultures and optionally
meadows) asserted themselves in more than 50% of the territorial units, the types
with an increase of the area of arable land in the second period occurred in less
than 15% of the units.
- In the period 1948-1990, the types with a decrease of the arable land and with an
increase of permanent crops and optionally of meadows, dominated.
- Latest development - the period 1990-2000 is characterised by types with an
increase of meadows, permanent cultures and pastures and with a decrease of
arable land. It is essential to emphasize that in comparison with the previous
period, this time, where the types of development characterised by an increase
of the area of arable land occur (more than 35% of the units and more than 30%
of the area), the number of units significantly increased.
Before the data evaluation of a detailed land-cover analysis of sample areas, we
have to point out several specifying facts. First of all, sample areas defined from RS
(remote sensing) and according to BTU are slightly different, namely in five BTU.
Their definition, based on RS is only part of the area. Secondly, there is a specific
fact, coming from the method used, which evaluates landscape changes with the
help of typology of areas' macrostructure. The fact is, we evaluate zero change
in range AGL (agricultural land), forest or other areas the same as growth, which
means sign +. In the monitored complex, this fact appears four times. Furthermore,
there is an impact of zero presence of forest areas in these four BTUs.
7.7 Results of Evaluation of Sample Areas
The development of land-cover macrostructure was, in all three monitored regions,
strongly differentiated. In the first and second period, type - + + characterised sam-
ple areas Bílina and Trebenice, which means ZPF decrease, and growth of forest
and other areas. In sample area Petrovice, the development of macrostructure was
different in the first and second period: in the first period it was type + + -, and in
the second - - +. In the third transformative period, functions of these three sam-
ple areas changed, and the result is a different development of macrostructure of
land use.
It is significant that the above-mentioned characteristic of development of land-
cover macrostructure in sample areas as a unit, is a result of rather opposing trends
from a BTU point of view, by which sample areas are formed. Only the smaller part
of the BTU has an identical type of development of land-cover macrostructure in
comparison with sample land cover as a unit.