- Biogeography (19)
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- Environment (76)
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- Human and economic geography (62)
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- Various (33)
Abstract: The paper aims at analyzing the environmental quality of the Bâsca Chiojdului river basin by calculating a variety of environmental indices: human pressure index through population dynamics, human pressure index through agricultural land use, the naturality index, artificialization index and environmental change index. Choosing a 1 km grid for calculating and comparing these indices at the level of the river basin allows a more concise analysis on the environmental quality. Subsequently, the temporal dynamics of the environmental indices values is highlighted by the 40 years interval used especially in the human factor analysis, and by choosing the year 2005 as reference year. The results, embodied in the values obtained by applying formulas to calculate the environmental indices (human pressure index through agricultural land use – 44.19% agricultural land, the naturality index of the landscape – 50.82%; the artificialization index of the landscape – 2.32%; the environmental change index: Maruszczak version – 33.92; the improved version – 1.09, the completed version – 10.83) present the state of the environment. The proposed measures to stabilize and maintain a good environmental quality in the Bâsca Chiojdului river basin regard mainly the forest ecosystem, because it is the most important factor of maintaining the balance by its protective functionality on the environment.
Abstract: Given the lack of usable data in the correct assessment of housing quality in an urban ecosystem, it is necessary to establish a system of environmental indices that can be used to evaluate and compare the attractiveness of urban neighborhoods. Oxygen generating surfaces fulfill multiple functions and give a certain quality to urban environment and housing, especially through the green spaces. Green spaces have an unequal distribution in the area of Bucharest. The structure, functions, adding availability and/or attractiveness of green areas define the neighborhoods in which they are located, and whether they are topophile or topophobe ones. In the present study, based on field observations, processing of cartographic materials and using the green spaces as most relevant index, topophile and topophobe neighborhoods have been identified in Bucharest. The tendency of residential areas development was also evaluated and it was found that it depends on the attractiveness of existing urban parks or neighborhood gardens.
Abstract: The present paper aims at analysing the human-induced transformations that took place in the Drobeta-Turnu Severin – Bechet sector of the Danube Floodplain during the last two centuries. The research started from the need to obtain a real and comprehensive database concerning the extension, the nature and the characteristics of the topographic-hydrographical, edaphic and biologic structures appeared or modified under human influence, their relation with the changes occurred at the level of the land use and their present functionality. Special attention was paid to the latter transformations occurred after 1989. The primary types of topographical and hydrographical changes resulted from the geomorphic human activity in the Danube Floodplain are analysed in relation with the land use within this unit. The analysis of the environmental transformations in the floodplain sector started from cartographic and statistical materials that are relevant for the 19th-21st centuries. For the post-communist period, the valorisation of the Corine Land Cover database allowed for a more detailed analysis of the land use dynamics. The data thus obtained was checked and updated with field observations and measurements, which are mandatory given the fact that the cartographic database shows deficiencies and it is partially outdated.
Abstract: This case study refers to forest area dynamics within the Vâlsan Basin, situated between his affluents: Mierlei Valley and Bunești Valley in 1904-2004 period. The dynamics was shown by maps on a temporal scale especially in reference years as 1904, 1973, 1981, 1994, 2004. Forest cover from our study area has been decreased substantially because of the impact of human activities. We can conclude at the end of our paper that forest ecosystems had lost the natural equllibrium, and barely can realize the protective and hydrological function, in the context of declaring our study a natural reserve.
Abstract: Over the past 40 years ambient air quality in Brussels improved significantly. This was especially true for sulfur dioxide, lead, nitrogen monoxide, carbon monoxide, benzene and Benzo a pyrene. With respect to the air quality objectives imposed by the most recent European directive on air quality, 2008/50/EC, two major problems remain: nitrogen dioxide (NO2) and particulates (PM10 and PM2.5). Although the air quality objectives are met at several measuring sites in Brussels, a thorough analysis of data shows that it will be impossible to become fully compliant, in due time, in all of the different urban environments. A comparison of the average concentration levels in the Brussels Capital Region with those in the surrounding regions, the interpretation of the average daily and weekly concentration profiles and some special observations (e.g. car free Sundays) make clear that drastic emission reductions will be needed if compliance is to be assured solely by measures on the local scale.
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