جستجوی مقالات مرتبط با کلیدواژه « Boyer » در نشریات گروه « منابع طبیعی »

This study aims to investigate the effect of physiographical factors on land use/cover changes in the Yasouj Forest Park during 1965 to 2011. It was evaluated and monitored using aerial photographs 1:20000 scale, panchromatic satellite imageries from IRS-P5 (2011), and online Google Earth images (2011). Two series of images in two adjacent monitors were interpreted and compared using a simultaneously comparison and interpretation method. For this purpose some of land use/cover characteristics within sample plots taken from similar location were used in a digital systematic grid. The results showed that about 60% of sample plots located in different classes of slopes and elevations were not changed during this period of time. However the most land use/cover changes have been occurring in low slope areas and the least changes have been occurring in high slope areas. It is concluded that topographical factors, particularly slope are important factors for the protection of the forest cover in such areas. Park area protection could also be as an important prohibiting factor for major changes in the study area. The distribution pattern study of woody spices’s maturer stems is not good enough for about a 50 year period. Increasing dirt road in the park during the recent decades leads a social need for better planning of this decentralized recreational zone.

Inappropriate use of production factors in order to enhance product performance during the last decade as a result of adverse environmental degradation and the need for sustainable production and food security shows the importance of the stability of the agricultural exploitation system. Accordingly, this study is aimed at eluciating the stability of operating systems of small scale peasants in the rural area of Boyer-Ahmad County. To determine the statistical sample size Kerjcie and Morgan sampling table was used. Sample size was estimated from tables of 33064 farmers living in the area and a sample size of 380 was calculated for each district according to simple random sampling. The data collection instrument was a questionnaire with closed and open-ended questions, which includes four parts. In order to assess the stability of the composite index in the three dimensions of economics, social and ecological use, the weight of each index was determined by the entropy method. The results indicated that the stability of the whole system of exploitation of small sacle peasant’s wisdom in rural areas of the central district of Boyer- Ahmad County is in semi-sustainable conditions. In consequence, the results showed that the unstable economic indices and the social and ecological conditions are sustainable. Therefore, the strengthening of the economics of small scale farmers can improve the sustainability of agriculture which should be considered as one of the main goals.