جستجوی مقالات مرتبط با کلیدواژه « location » در نشریات گروه « محیط زیست »

Greenhouse refers to a limited space that has the ability to control the appropriate environmental conditions for the growth of plants in different areas during different seasons of the year. Rapid economic and cultural growth, population growth, soil and water constraints, the community's need for food, the existence of large consumer markets and the interest in producing off-season crops in recent years have led to the development of greenhouse crops. But choosing the wrong place to build a greenhouse leads to a waste of capital and the failure of these goals. The purpose of this study is to find the optimal location of the greenhouse in Asadabad plain with a sustainable development approach.

Due to the existence of numerous and effective parameters –for the performance of greenhouses, the technique of multi-criteria analysis has been used to find a suitable location. Also, due to the uncertainty in the behavior of natural parameters, fuzzy logic has been used to model the effect of the parameters.

The results show that of the total area of Asadabad plain, 10% are in a very good condition, 39% are in a good condition (suitable with restrictions) and 51% are in a bad condition in terms of greenhouse construction.

Relying on spatial analysis can reduce the investment risk for greenhouses and lead to environmental sustainability.

The location of city service units such as fire stations in urban areas is always one of the issues of municipalities that should be investigated and determined very carefully. The effectiveness of service quality and efficiency of fire stations is highly dependent on their proper location. Therefore, in this study, an attempt is made to determine the appropriate place to use for the establishment of a fire station by examining location information in district 16 of Tehran municipality (Nazi Abad district). For this purpose, 8 indicators affecting the location of the station were determined. The Fuzzy Analytic Hierarchy Process was used in order to prioritize them and determine the weight of their effect. Then spatial information of each of the indicators for the studied area were prepared in ARCGIS and discussed. Finally, by combining the maps, suitable places to establish a fire station with maximum efficiency were determined. According to the results, the southern strip and a part of the northern area of the investigated area are completely suitable for building a fire station. There is no possibility to build a fire station in the northwest and west side of the area due to its usage. Also, the eastern and northeastern sides have a similar situation.

Abstract Today, proper planning and comprehensive use of the environment is based on recognizing the potential of the land. The selection of recreational places such as tourism development should be based on ecological, social and economic components, no development will lead to sustainable development without proper studies and planning for development. Given the population growth and human need for recreational spaces, sometimes studies for tourism development seem necessary. Due to the importance of parks and green space in human life, in this study, appropriate locations for the development of natural tourism and optimal location for tourism development were measured and selected. For this purpose, from the method of global networks and criteria for selecting the location of the forest park, water resources, road access, landscape, climate, forest percentage, and topography were examined according to the conditions of the region. The sum of the scores per square showed that the score obtained by the squares is between 25 and 50 points. The result indicates the ability of the measured units to evaluate from inability to weak to develop recreation.

Studies for land use planning and allocation at all national, regional, regional and local levels is one of the levers of sustainable development. The environment is the most important component of human life. In a way, one of the most important challenges for governments in this century is environmental crises. Therefore, it is necessary to apply the right methods of ecological resource management with a sustainable development attitude. (Nakhaei et al. 2010). Urban green space provides a pleasant environment for urban dwellers with longevity, stress reduction, relaxation and sports opportunities, and allows them to connect with nature and engage in outdoor activities. In fact, green space and its use is of particular importance to planners. (Lee and Ghosh 2018, Chen 2017, Roland and Debrah 2014). A quiet environment, such as parks, waterfront areas and more Recreational spaces are an integral part of a city and are beneficial to the physical and mental health of individuals (Gupta et al. 2012). Studies on vegetation indicate the sign and its effects (Akpinar et al. 2016 and Yang 2009). Psychological studies have also shown this (Cutter et al. 2018).

Topographic map of Ardabil city, section 1, scale 1: 50,000 of the country's surveying organization and other required maps were prepared and based on the network method, the map was divided into square pieces. Based on the UTM lines on the topographic map, the square was selected and the length of each side of the square (dimensions of each side of the grid 12 cm on the map) was considered. (Barzeh Kar, AH, 1384). Finally, 20 evaluation units were obtained. Then, the effective factors in this method, which include (height difference to the region itself), the percentage of forest relative to the area, water resources, landscape and road, were identified and extracted from the topographic map. Analysis and identification of ecological resources was done in the units and scoring and scoring was done according to the criteria of forest park selection and the relevant ecological model using the network method. Also, using satellite images of Google Earth software and frequent field visits, the characteristics of the areas were reviewed and identified, and finally scoring was done and compared with the relevant model, and then recreable and non-recreable areas were separated. From the topographic map of scale 50000/1 of the country's surveying organization to prepare maps of height from the surface, extract information map of water resources and access routes and roads and to estimate the percentage of forest and canopy density from vegetation map information of scale 1.25000 The General Department of Natural Resources of Ardabil Province was used. Landscape information was also obtained through field visits and navigation and Google Eearth software. Recreational power assessment was performed based on the network ecotourism model in three steps. In the first room, physical resources such as (altitude, water resources, length of road per unit and access, topography) and biological data (vegetation) in the area were identified. And landscape information was reviewed by Google Earth field surveys and satellite imagery. Then, climate data were prepared and analyzed and summarized. In the final stage, in order to evaluate the ecological potential of the area to select the location for the forest park and recreation, the characteristics of the units were compared with the ecotourism model of the networks for the forest park location. And suitable units were determined for the development of recreation. In the first step, the structure of the network was described with the aim of evaluating the recreational potential of the region to select the location of the forest park. There is water, perspective and access. In the next level and the final stage, the total score of each unit measured in 5 classes is between 100-50 and quality classification in 5 classes. Table 1) and in the fourth level, suitable places for recreation and suitable areas for recreation development, after comparison with the following classes, were placed in several classes of powerlessness, weak power and medium power. Classes 3, 4, 5 indicate suitable places for tourism development.

In this study, in order to determine the potential of the land for the development of ecotourism activities, the networking method was used. And the results showed Table (2) - Most units do not have the capacity according to the network model to develop recreation. It should be borne in mind that any model for use in different areas may have advantages and limitations. In other words, the specific model of each region is a function of the specific conditions of that region. Therefore, with heavy field operations and complete and accurate knowledge of the characteristics of the area, the model should be determined so that the best and most accurate result in the evaluation can be achieved. This study showed that according to the results of this method, the degree of land quality for the development of recreation in the units is significantly different, so the place of recreation development should be determined along with studies. Given that people are the main beneficiaries of recreation areas, the manner and function of their choice of recreation space can be of great help to researchers in planning recreational projects. Recognizing the places where the density and pressure of the population is higher and the reason for this density makes it possible to properly evaluate and design the distribution of facilities and to transfer the pressure of recreational use to less visited places that Is one of the main objectives of this study and moderated the environmental damage caused by tourist density. One of the basic steps to promote the development of any country is the optimal use of all its resources with scientific management. Due to the increase in population and the need for recreational areas, it is sometimes necessary to identify areas prone to ecotourism use through ecological potential assessment studies. For this purpose, it is suggested to use newer evaluation methods. And the results of these researches should be compared with the previous methods and results, so that better results of land capability for the desired land use are of great importance. The need to protect and support areas with special habitats is more important than the development of tourism.

Nowadays, location surveys are very common in industrial development for all power plants. In these studies, different criteria are taken into account to select the best place to build a power plant. In the present research, in the first stage, a variety of power plants and their mode of operation were investigated. Then, in the next step, the effective parameters in the activity of the power plant, its location and its performance were determined and divided into three categories of environmental, technical, socio-economic and environmental constraints. In general, all criteria and sub-criteria were expressed in relation to the location of different types of power plants (heater, gas, combined cycle, nuclear, hydroelectric, pumped storage, waves, tidal, wind, solar, geothermal, biomass, diesel and magneto-hydrodynamics). Finally, by specifying such criteria as: energy source of power plants, usability and availability of resources, costs, desirable or unfavorable effects on the human environment, and power generation capabilities, a summary of the characteristics of a power plant was identified.

In recent years, location studies have emerged as one of the key elements in the success and survival of industrial units. Facility location studies have received much attention both nationally and internationally. Understanding the goals and methods of resolving problems is very important. Locating is one of the engineering sciences of industry which focuses on reducing costs and success of industrial units. Locating centers (locating buildings and centers) consider choosing a location for one or more centers, taking into account other centers and constraints, in order to optimize a specific purpose. This can be the cost of shipping, providing fair service to customers, capturing the largest market, and so on. Location studies require specializations, including: research in operations, decision making methods, geography (geology and weather), engineering economics, computer science, mathematics, marketing, city design, and more. The main issue in this article is to find all the appropriate areas for a light manufacturing plant in a small area in Kazerun. Therefore, after considering the constraints with the buffering tool, overlay appropriate areas were created for the purpose. From the 9221000/74 hectare area, we obtained the 0700000/11 hectare.

New cities are established in order to meet needs such as absorbing population overflow, home provision and many other factors. New cities are planned settlements which have been established in order to solve population and economic problems of metropolises and countries since the beginning of the twentieth century. Orientation to establishing new cities unofficially began from 1985 in assemblies related to city planning of Iran and finally in 1989 it was officially approved shod in Parliament (Majlis). Too many various factors have been involved in successful and unsuccessful condition of such cities from that date on. Choosing place of a new city is one of the most complex space decision-makings which is in domain of decision-making models so called ground compatibility analysis or optimum lands location. Appropriate location studies will have social, cultural and economic consequences in the construction site, moreover laving economic effect on performance of unit that is under construction. It also maintains environmental properties as key factors in determining a place in location problems. In this paper, we will review on the literature of new cities, the process of theirs formation, the importance of locating new cities and indicators of locating new cities.

Population growth, industrial development and increase in quality and quantity of consumer products has led to the increase of waste generated. According to Department of Municipal Utilities of Bukan an average of 189 tons of waste is generated daily, that means per capita waste generation is about 640 to 820 grams per day, which is slightly higher than the country average (the equivalent of 600 to 800 grams per day).Therefore the selection of a municipal waste landfill is one of the most important steps and goals in management of municipal solid waste of Bukan.
This study is analytical-descriptive, therefore by full recognition of locating criteria such as communicational lines, distance between rural and urban areas, surface waters privacy, distance from fault, land usage, slope and the direction of slope which play critical rule in selecting the waste landfill site and utilizing Boolean Logic and weighting of layers using AHP model in GIS software, the best location for landfill waste is selected based on mentioned criteria.
Findings: Results obtained from the poll of experts in the AHP model has showed that Hydrology criterion with a weight of 0/235 as the most important and land use with a weigh of 0/023 as the least important one have been known. Also after extracting the information layers of criteria from the maps and prioritizing locating ranges in 5 classes, it has been found that there are notable zones to landfill waste in the city of Bokan which ultimately a zone with the area of 138 Hectares is chosen. The selected are is located between Bokan and Simineh and to the south of Kani Shaqaq village.
Discussion and Generally, considering the results of the presented research, it can be said that prioritised ranges for positioning can be determined by combining the Boolean logic method and AHP model, acceptably.