چکیده:
There have been different indices identified for desertification. Among these is technogenic desertification index which
seems much more efficient. In this study, some of technogenic desertification indices were studied and evaluated. First
land use maps of the region were taken from IRS-PAN satellite image and aerial photos analysis. After evaluating the area
of different uses, lands that had productions (like agricultural and horticultural lands) were taken apart. The ration of
production per surface unit was also calculated. The region roads map was also derived from satellite image. Finally per
capita production, road and mine density and per capita green space indices were used. The per capita production index
9.1, population pressure with 59, road and mine density with 3.6 km/km2 and green space with 18.2 m2 for each person
were the other indices calculated. According to the proposed table on these indices, per capita production and per capita
green space in the region show very high level of desertification but road and mine density identifies lower level.
خلاصه ماشینی:
According to the proposed table on these indices, per capita production and per capitagreen space in the region show very high level of desertification but road and mine density identifies lower level.
Keywords : Land use map; Desertification indices; Technogenic desertification; Per capita production; Road and mine density; Green space 1.
Ekhtesasi and Ahmadi (2005) and Tazeh (2004), proposed the indices: ratio between potential population and real population, road- mine density in km/km2, green space (parks, house gardens) per individual in the region, etc.
Researches showed that statistics and numbers are not exact and the changes process has not been well registered, In order to get exact results, we used the area of agricultural lands to calculate the percentage of production in these lands, After analysis and comparing aerial and satellite photographs and images, the land use maps were published as below: municipal lands, agricultural lands, horticultural and etc.
3. Result and Discussion After researches and using different analyzing factors and also comparing satellite images, land use map for the region was prepared as presented in Figure 1 and Table 1(View the image of this page)Fig. 1.
Using the above maps, the following factors were produced as technogenic desertification indices: Population pressure per capita production in calories, road-mine density and green space per individual (Figure 2).
Researches showed that the annual production is 3486103 kcal and can be enough for 6367 individual, considering the current population; the region is in an ultra-high level of desertification (Beyrodian, 2001).