خلاصة:
Investigation of desertification trend needs understanding of phenomena creating changes singly or action and reaction
together in the manner that these changes were ended up in land degradation. In investigation of pedological criterion on
land degradation in Quaternary rock units, first, a part of the Rude-Shoor watershed area was selected. After
distinguishing target area, maps of slope classes, land use and geology were created, and then map of units was founded
by overlaying and crossing these maps. In this research three indices of erodibility, salinity and permeability of soil were
considered that finally each of them was shown in the shape of classified map. Then by overlaying and cross of these three
maps, a new map was created that is an expression of research area zonation from the viewpoint of indices that formerly,
were explained. As determining and distinguishing of desertification intensity of potential of created units from crossing
of indices was not possible with using of pure mathematical or statistical relations, so were exploited principles and
concepts of fuzzy logic and statistics for achieving to main result and were used functions of fuzzy algebraic sum, fuzzy
algebraic product and fuzzy gamma after determining weight or value fuzzy gamma after determining weight or value of
factors. Obtained results from a comparison of gained maps from different operators with an evidence map expresses this
actual that the most appropriate of fuzzy function for zoning desertification intensity or potential in research area and
similar area with that is function of 0.8 from fuzzy gamma model (gamma = 0.8). After classification of obtained map
from function of 0.8 from fuzzy gamma model, by overlaying the desertification potential zonation map with land use
map, kinds of soil zones were characterized on the base of their desertification effect. This research determined two
classes of desertification qualitative potential (high 43.08% and moderate 56.92%).
ملخص الجهاز:
In investigation of pedological criterion on land degradation in Quaternary rock units, first, a part of the Rude-Shoor watershed area was selected.
As determining and distinguishing of desertification intensity of potential of created units from crossing of indices was not possible with using of pure mathematical or statistical relations, so were exploited principles and concepts of fuzzy logic and statistics for achieving to main result and were used functions of fuzzy algebraic sum, fuzzy algebraic product and fuzzy gamma after determining weight or value fuzzy gamma after determining weight or value of factors.
8 from fuzzy gamma model, by overlaying the desertification potential zonation map with land use map, kinds of soil zones were characterized on the base of their desertification effect.
ir Feiznia (2002 and 1997 a & b), Kashki (1997), Rajabi aleni (2001), Gorji Anari (1993), Sarabian (2002), Esenov et al ( 1999), Kaushalya (1992) and Metternicht et al (1996) showed the relation between salin Rock units and degradation of land and water.
Salehpour jam (2006) investigated desertification potential of kinds of rock units in Rude-shoor watershed area with using of fuzzy logic, he introduced function of 0.
8 from fuzzy gamma model (Figure 9), by overlaying the desertification potential zonation map with land use map, kinds of soil zones were characterized on the base of their desertification effect (Table 5).
Salehpour Jam (2006) introduced function of 0/8 from fuzzy logic model for desertification potential of kinds of rock units.