جستجوی مقالات مرتبط با کلیدواژه "zanjan" در نشریات گروه "زیست شناسی"

Systematic management of waste as a principle of sustainable development is considerable from health- environmental perspectives. Sanitary disposal of waste with methane extraction meet these goals and also consider renewable energy extraction. This study paid to the potential of methane extraction during period of 24 years (1997-2021) in Zanjan landfill (Mehtarchiee), based on quantity and quality of Zanjan wastes in three time section (2004, 2009 and 2016). For this purpose, the proposed model by Intergovernmental Panel on Climate Change (IPCC Waste Model), the effect of climate (temperature and humidity) on extractions and time pattern of emissions are studied. Results indicated that due to the high percentage of decomposable organic compounds (60-70%) and relative humidity (69%), Zanjan's wastes have a high potential for methane extraction. During the study period, 43.34 Gg of methane and an ascending- descending pattern have been emited. The best climatological conditions are warm-humid and temperate- wet, respectively. Waste incineration in compare with sanitary disposal (with methane extraction), despite a significant reduction in volume and rapid energy recovery, is not a good option due to the high humidity level and limitation of combustible material and faced with environmental consequences.

The increasing pace of change in the early decade of the 21st century has led to the emergence of an age of uncertainty and an environment full of opportunities and threats to today's complex systems. In this volatile and rapidly changing environment, traditional planning tools such as outsourcing, forecasting, and foresight alone will not work for the medium to long term. In fact, it should be said that the current problems of human society due to the lack of accurate knowledge of the future in the past on the one hand and astonishing developments in technology along with the accelerating process of globalization on the other hand, recognizing future developments and striving for architecture is necessary and avoided. Zanjan province has experienced rapid growth in the number of urban population, number of urban settlements and economic activities in the last 4 decades. Due to the challenges of the natural and environmental structure of the province, including the province in semi-arid and arid conditions, exploitation of mines and economic, development activities and the spread of pollution, reduction of some animal species, destruction of biological resources, severe soil erosion, harvest unprincipled sources of water resources and destruction of riverbeds, etc. make it necessary to conduct research on the environmental status of the province in the next few years based on the current situation and future forecasts based on scientific methods. Therefore, this study aims to identify the main and influential factors on the environment of Zanjan province and finally select the most appropriate scenario and help reduce environmental problems in the future by evaluating the available information and documents in the field of environment and based on land management. Has been.

Method of the present study is combination of library, documentary and survey methods and in terms of nature is based on futures research methods. Gathering information about the environmental status of the province is based on land management studies and analysis of the environmental status of the province and preparing maps related to ArcGIS software using the layers in the province. In this study, influential factors were determined according to the opinion of experts and specialists and using a questionnaire in the form of Delphi method (Delphi technique) and to analyze the research information, the method of interaction analysis was selected. MICMAC software was also used to analyze the effect of factors on each other and also Scenario Wizard software was used to perform scripting calculations. In this study, using the Delphi method, a questionnaire was prepared in two stages. In the first stage, the questionnaire was designed as an open-ended question and was provided to experts (25 experts) and they were asked to identify the effective factors in the environment of Zanjan province in the central issues, taking into account various and comprehensive areas, including economic. , Introduce social, cultural, political and environmental. The result was the extraction of 53 possible factors affecting the environment of Zanjan province. In the second stage, after identifying the effective factors, the variables were entered into the interaction analysis matrix, and then the standard interaction analysis questionnaire was provided to the experts. The calculated indirects were analyzed and after identifying the effective factors and uncertainties, finally the final key factors identified as the main underlying factors in the scenario were used. As a result, by preparing favorable and credible scenarios, strategies for the environmental situation of Zanjan province have been stated.

In order to analyze the future of environmental research in Zanjan province, first through Delphi method and focus groups and based on the discussions in the theoretical and methodological frameworks and environmental challenges of the province, the opinions of experts in the field of environment through an open questionnaire, 53 effective factors in the environment. Biology of Zanjan province was extracted. Then, by placing these factors in a matrix of 53 by 53, the effect of each of these factors on each other was determined in the form of a questionnaire. The results show that the environment is more dependent on the human factor and legal structure than anything else. As laws and regulations and environmental management have an important role in the future environment of the province, in the next stage, economic and investment structures are effective. On the other hand, the natural environment and natural areas have the most direct impact in the future, in the second stage, all types of environmental pollution are affected. Then the fields of agriculture and natural resources are the most affected. In general, it can be inferred that human factors are the most influential and natural factors and natural resources are the most influential. Based on the results, it was determined that one of the most important factors in the future of Zanjan province's environment with a landscaping approach is Zanjan province's environmental management and the economic situation of the province and the country, which as two driving forces can affect the future of Zanjan province's environment. Give. These two forces were identified as the axes of the scenario, based on which three scenarios with the titles of the first scenario (marigold) - economic stability - integrated environmental management of the province, the second scenario (in search of spring) - economic stability - lack of integrated environmental management Biology of the province and the third scenario (spring death) - economic instability - lack of integrated management of the province's environment were developed.According to the the lack of selected certainties and the main axes of the scenario, three scenarios for the future environment of Zanjan province were conceived. In the most favorable scenario, we will face economic stability and integrated environmental management of the province. In this scenario, the situation of environmental indicators will increase and the province will develop in all environmental areas. Public participation and capacity building will also increase in this scenario. In fact, this scenario shows the optimal environmental situation of Zanjan province. In the second scenario, when economic stability and lack of integrated environmental management prevail in the province, the scenario of parts of the environment, including the protection of natural areas and endangered species due to lack of management costs and human resources are most affected. In general, in this scenario, the environmental situation of the province will be degraded in some sectors and will be protected in some sectors. In the latest scenario, which is faced with economic instability and lack of integrated environmental management, all sectors of the environment, including the protection of natural and endangered species, polluting industries and urban and rural waste management, are most affected. In general, in this scenario, the environmental situation of the province will be destroyed in all sectors.