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A forecast of the corrosion activity within different landscapes of the cryolithozone is poorly studied previously. This study represent a close correlation between the proportion of corroded sections of the gas pipeline route of the gas field Medvezhye (the North of Western Siberia, Russia) and the deviation of the redox potential of soils (ΔEh) depending on the specific landscape types (tract groups). Our study revealed that the maximum value of the standard deviation of the redox potential (ΔEh) predetermines the maximum currents of the differential pairs aeration of soils that activate electrochemical corrosion processes in pipelines. The value of ΔEh is proposed to use as the main indicator of the activity of corrosion of the landscape types in the permafrost region.
Regardless of the existing governmental and public preventive actions for surveillance and controlling the air quality in several regions of the Chennai city in India, the air quality does not meet the desired standard. In this regard, this study employs an ARMA/ARIMA modelling approach for forecasting Respirable Suspended Particulate Matter (RSPM), Sulphur dioxide (SO2) and Nitrogen dioxide (NO2) concentration for three most polluted sites in Chennai city. A total of nine univariate linear stochastic models have been developed, three for each of the stations which includes one for each of the specific pollutants in order to forecasts the concentration of each pollutant. The evaluation of the model statistics R2 values and index of agreement values evince that a significant level of real-time forecasting of the pollutants can be achieved by employing the developed ARMA/ARIMA models. Moreover, the comparisons of actual air pollutant concentration have been carried out with the permissible limit as prescribed by the National ambient air quality standards (NAAQS) of India for assessing the level of pollution of all three locations.
Direct discharge of untreated tannery waste in the environment causes severe pollution and grave public health concerns. In this paper, the extents of pollution around a newly built industrial area, which is associated with untreated tannery effluent discharge, have been investigated. Temporal and spatial distribution of four heavy metals: chromium (Cr), lead (Pb), cadmium (Cd) and arsenic (As) have been modelled using a numerical model namely COMPASS, which studies coupled fluid flows, reaction and deformation processes in subsurface porous media. Two sets of contaminant discharge rates have been considered to predict the metal contaminations over a certain period. The results of the study suggest that a discharge of 0.026 m3 of wastewater per day can lead to high levels of Cr and Pb accumulation in the study area by exceeding the regulatory standards advised by many countries (Australia, China, UK and USA) and environment agencies. At this rate, concentration of As and Cd remain below the regulatory level in most cases. But an order of magnitude reduction in discharge rate, i.e., 0.0026 m3 per day results into safe concentration levels of all the metals considered in this study. The relative dominance of heavy metal contamination has been studied in the following sequence: Pb>Cr>As>Cd for sorbed concentration in soil aggregates and Cr>Pb>As>Cd for aqueous concentration in soil porewater. Further studies and information which are essential for a comprehensive environmental impact assessment have been highlighted.
Mangrove forest plays a crucial role in climate change mitigation by storing carbon in its above-belowground pools. However, this forest remains under considerable high exploitation from the expansion of settlement and aquaculture pond that likely results in much CO2 release to the atmosphere. The objective of this research is to estimate biomass carbon stocks of mangrove rehabilitated areas in Sinjai District, South Sulawesi. We used a line transects method for mangrove vegetation survey and determined above-belowground biomass and carbon stock using published allometric equations and a conversion factor, respectively. The results showed that the mean values of carbon stocks in above-belowground biomass were 125.48±93.48 Mg C ha-1 and 60.23±44.87 Mg C ha-1. The aboveground biomass stored more carbon than the belowground pool. However, low planting distance in mangrove rehabilitation and conversion of mangrove area into settlements and aquaculture ponds in the last three decades have affected forest structure and biomass carbon magnitudes. Therefore, preservation of intact mangrove and restoration of disturbed forests with pay attention to planting distance should consider. Besides, halting the expansion of settlements and aquaculture ponds are worthwhile options to maintain and possibly increase biomass carbon stocks.
In Iran, due to the multiplicity, diversity and cultural-natural potential of rural areas, developing ecotourism is accepted as a key solution to sustainable rural development. The government putting strong emphasis on analysing the capacities and obstacles of promoting rural tourism in order to making effective strategies. Kiskan Rural District (KRD) in Kerman Province has great potential for ecotourism development to diversify rural economy, employment and income generation. So the purpose of this study is to investigate the rural ecotourism situation of KRD through SWOT analysis. It is an applied research that uses documentary and field methods including observation, unstructured interview and a questionnaire to data gathering. A group of local managers, counting Village Council Members and Rural Mayors, were selected by snowball sampling method. To this end, the status of rural ecotourism in KRD is determined and the weight of each of the four SWOT factors is measured. Results show that KRD ecotourism development strategy is «SO» (aggressive), which should exploit the strengths to take advantage of the available opportunities.
The large community ice cellar designs in eastern Chukotka are unique within the Arctic due to the mixed influences from the indigenous Chukchi people and western industry. Community ice cellars here were designed and constructed in the 1950s-60s to accommodate both food stores for local indigenous residents and feed stores for Arctic fox fur farms. Like much of the Arctic, this region is undergoing unprecedented climate change. Air temperatures within the study area have been increasing at an average rate of 0.7°C per decade since the 1950s. Exacerbating the adverse effects of the warming climate is the lack of ice cellar maintenance in communities where the fur industry did not survive the transition to a market economy. Today, all but two community ice cellars in eastern Chukotka have flooded or collapsed. Presented in this work are thermal records from two cellars in the region that allow for both climatic and anthropogenic influences on the cellars’ structural integrity to be evaluated. Particularly effective ice cellar maintenance practices utilized in the community of Lorino were 1) wintertime ventilation, and 2) placing large blocks of river ice in the cellar in spring to mitigate spring and summer warming.
As the world’s largest coordinated network of protected areas, the Natura 2000 network (N2k) encompasses the most valuable and threatened species and habitats in Europe. However, N2k sites have been often criticized due to their rigid management system that focuses only on conservation practice without a strategic vision for linking with the regional plans. This study aims to develop a novel approach for sustainable management of N2k sites in Italy by identifying existing gaps and developing conservation policies. For this purpose, a panorama of the current challenges in the European sites was provided at the first step. Then, the management status of the natural protected sites in Italy was studied by selecting the Umbria Region as the case study. Finally, we develop a strategic approach for boosting the conservation policies and sustainable management of the N2k sites in Italy. The findings highlight that the sustainability of N2k sites requires an inclusive effort in the social, economic, and policymaking fields to meet its conservation objectives. Such an effort encompasses a sophisticated management approach that consists of a network of tools for monitoring the state of conservation, land uses, and socio-economic activities at the regional scale. Furthermore, the integration of environmental policies with regional plans is essential for the sustainable management of the N2k sites.

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ISSN 2071-9388 (Print)
ISSN 2542-1565 (Online)