fg
Volume XVIII |

Risk assessment of consuming aromatic hydrocarbons (The case study: Mesopotamichthys sharpeyi of Huralazim Wetland in Iran)

Abstract: Background and goal: Aromatic hydrocarbons are one of the most important environmental pollutants in the environment. These compounds, even at very low concentrations, have carcinogenic and mutagenic properties and are quantitatively and qualitatively known as compounds that have entered all parts of the environment due to human activities. This research studies the concentration of aromatic hydrocarbons in the predominantly fish (Mesopotamichthys sharpeyi) in Huralazim wetland and calculates the risk of consuming this fish by a human.
Materials and Methods: In the spring of 2018, 210 fish were collected from 4 reservoirs (7 stations). The analysis of 16 hydrocarbon compounds was carried out using the GC-FID (Shimadzn-14A) equipped with a capillary column (RTX-5).
Results: The highest concentration of oil-based hydrocarbons was in fish of station 7 (43.93 ± 2.70 mg/kg) and its lowest concentration was at station 1 (9.52 ± 3.06 mg/kg). The highest carcinogenesis incidence rate was 1.13 at station 7 and the highest mutation rate was 23.49 at station 5. The gradual carcinogenesis rate of Benz [a] pyrene was 0.00003 to 0.0029 and n in general, through Huralazim Wetland it was 0.0027. The gradual mutation risk assessment for Benz [a] pyrene was estimated as 0.055 (which ranges from 0.034 to 0.061).
Conclusion: According to the standard of mutant and carcinogenic compounds [5], it can be said that the daily consumption of fish in this wetland increases the risk of cancer and mutagen in the consumer population. Measures have to be taken to reduce the consumption of caught fish which are exposed to pollution in Huralazim Wetland, in order to minimize the risk of gradual cancer or mutagen, especially in the natives of that area.

Volume XVIII |

New application of fuzzy logic algorithm in GIS for land classification

Abstract: Population growth and disorganization of urban planning have led to unsuitable city development in the center of Iran. Suitable region recognition for urban land develop-ment is an important step towards future planning. In the present study, fuzzy logic algorithms (OR, And, Sum, Prod-uct and Gamma) were used within GIS in order to identify valuable land for appropriate residential development. Moreover, effective factors of urban land development (elevation, slope, aspect, geology, land use, drainage net-work, main and bypass roads, distribution of urban and rural areas, and fault line layer) were examined on fuzzy analyses to find the most effective ones. The results showed that, by considering the regional priorities and constraints, the best operator was Gamma, with a power of 0.9. According to this, 74 percent of the total regions are located between less and the least valuable lands and the remaining surfaces (i.e. 26% of the region) were classified from valuable to the most valuable lands. The sensitivity measurement of the layers used in the study showed that fault and distribution of urban and rural layers were the most and the least effective layers on region recognition (i.e. by 25.83% and 3.29%, respectively).

Volume XVIII |

Post-Communist Urban Ecologies of Romanian Medium-Sized Towns

Abstract: The post-communist policies on urban restructuring were the driving force in redundant and marginalized spaces’ reproduction in all Romanian cities and towns. The paper investigates post-communist urban ecologies and derelict urban environments in Romanian small-sized municipalities, since these issues remain peripheral in the contemporary research on post-communist urban identity formation of the cities. The research was conducted in the town of Lugoj of Romania, from 2012 to 2016. It bases on empirical data provided by ethnographic analysis, quantitative approach and qualitative investigation. The results unveil a massive decline of some urban areas managed by post-communist policies on urban regeneration, with negative consequences, risk potential and derelict landscapes threatening the local urban welfare. Therefore, these marginal places request further enhancement urban policies to reduce their negative results claiming for more attention by the side of local governments.