Urban Planning
Akbar Rahimi; Arman Rastkhadiv; Kasra Ketabollahi
Abstract
In recent decades, urban population growth has led to an increased demand for food resources. In such a context, innovative approaches such as urban agriculture development have been proposed. The present study aims to investigate the trends in urban agricultural land changes within the boundaries of ...
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In recent decades, urban population growth has led to an increased demand for food resources. In such a context, innovative approaches such as urban agriculture development have been proposed. The present study aims to investigate the trends in urban agricultural land changes within the boundaries of Marivan city from 1972 to 2022. It seeks to assess the available land, potentials, and strategies for the development of urban green spaces based on urban agriculture principles. The research methodology employed a descriptive-analytical approach, utilizing Landsat satellite imagery for data collection. Radiometric and atmospheric corrections were applied, along with the NDVI index using ENVI software. After generating maps, the evolution of land use changes and the extent of available land for urban agriculture in the study area were examined for the year 2022. Furthermore, this research provides practical solutions and recommendations for the implementation of urban agriculture in Marivan city, based on its potential. A noteworthy aspect of this research is its intention to explore the suitability of land and potentials for urban agriculture in Marivan as a new model for developing urban green spaces. The results of the study indicate that urban agricultural lands have gradually decreased over various periods from 1972 to 2022 due to the city's growth and other human activities in peri-urban areas. However, as of 2022, approximately 2,799 hectares of land are available for urban agriculture, serving as a new model for the development of green urban spaces in Marivan. Several factors contribute to Marivan's success in maintaining agricultural lands and orchards in peri-urban areas. These factors include its favorable climate and geography, strategic location, proactive policies, water resource management, commercialization of agricultural products, prevailing economic conditions, and a substantial labor force. The region has experienced relative climatic stability, ensuring the sustainability of its agricultural lands and orchards.
Urban Planning
Akbar Rahimi; Ramin Nagshbandi
Abstract
Introduction
The growing trend of urbanization in developing countries like as Iran has led to a threefold increase in the urban population, with 54% of the world's population living in cities and projected to reach 66% by 2050. From 1950 to 2014, the world's population increased by 423 percent. The ...
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Introduction
The growing trend of urbanization in developing countries like as Iran has led to a threefold increase in the urban population, with 54% of the world's population living in cities and projected to reach 66% by 2050. From 1950 to 2014, the world's population increased by 423 percent. The willingness towards machine life is the rapid development of construction in urban areas, causing psychological pressures along with physical pressures on the living environment in urban spaces) and can be said that construction without limitation in cities has a negative impact on urban landscape preferences. Also, rapid population growth in cities has a negative reflection on the environment and urban the pollution of cities, environmental degradation, also the ecological balance of the environment, destruction Cover plants of urban and suburban areas (farmland, gardens) and the conversion of natural ground cover to the impermeable surfaces. It also has an impact on the urban ecosystems. The sequence of that urban dispersal takes place. Extravagant use of suburban lands has led to dramatic changes in the landscape of suburbs and city entrances. Today's entrances, which serve as only an element to determine the city's boundaries, are decorative elements that are located in the middle of the city's entryway and can be said to have no identity. Some of the most important actions carried out in the field of organization of entrance gates in Iranian cities are the construction of the Boulevard and the Blvd and often has been added to the problems of these fields. The lack of proper city management, on the other hand, has led to undesirable uses at the entrance of cities that limit the attractiveness of tourism and the use of natural elements and make visual and environmental disturbances more evident.
The importance of urban landscapes has been revealed to everyone with its many benefits, so planning for urban landscape design is one of the most important issues in ecology and urban landscape. Landscapes are important in human life activities and how they affect the quality of our life. However, strategies for urban landscape management have been developed by experts and the perception of people from the urban landscape is often ignored. The European Landscape Convention (ELC) mentioned that people’s perceptions are the main factor in the assessment and planning of the landscape because general people think in a different way than experienced designers’ do. Studies show that human judgment is instinctive so that prospects for suitable for survival are more preferred. These responses are usually unconscious and immediate. So, in planning and managing public spaces, they need to be considered and understood by users of these.
The need to integrate public perception and expert approaches into landscape management processes can help improve the urban because the use of urban sights is a expect if the reality is not coordinated, it leads to incompatibility between space and citizens. It is obvious that recognizing the desires of people and their preferences is not only an educational challenge, but also vital for policymaking and implementation, and in addition to creating more attractive neighborhoods and promoting environmental services. In this way, urban spaces can be gained better acceptance and satisfaction by people of society. Evidence shows that in Iran, public perception of urban landscapes, especially at city entrances, has not been addressed at all, and therefore, this study attempts to examine the perceptions of people who use the entrances to Saqqez city in order to improve their perceptions. Environmental quality from the perspective of the indigenous peoples of Saqez, travelers, and tourists.
Materials & Methods
study area
The city of Saqqez is located in the northwest of Sanandaj City (center of the province) and approximately 190 kilometers. The city of Saqqez has located between orbit 36 degrees 13 minutes to 36 degrees 16 minutes north latitude and 46 degrees 14 minutes 46 degrees 17 minutes east longitude. The city of Saqqez, with a population equal to 168.258, has also been divided into 22 neighborhoods and 8 districts.The city of Saqqez has 4 entrances; it has one entrance to Sanandaj to the south-east, 1 to Boukan to the north, 1 to Baneh to the west and 1 inlet in the northwest of the city where this entry is a rural entrance, which in this study will examine three main entrances of the city Used.
Questionnaire Structure
The questionnaire is divided into three sections. The first section contains demographic information. Before scoring each landscape scene, the participants had to indicate their personal socio-demographic information; marital status, age, education level, monthly income, and city of residence. Finally, the third section deals with the independent and dependent variables of the research. The questionnaire was designed based on the Likert spectrum and is structurally closed.
Scene Evaluation
The studies’ photographs were collected during the summers of 2018. All photographs in the studies were taken on sunny to partly sunny days from 10 am to 4 pm to avoid large differences in lighting. They were taken from approximately 5 feet above the ground from streets or sidewalks. A total of 40 images were selected and presented as a booklet. All 12 pictures related to one entrance and 2 photos of the beginning of each section and 2 final pictures were not considered in the analysis. participants were asked to evaluate the images on a 5-Point Likert-type Scale (Very nice + 2, beautiful +1, normal 0, ugly -1 and very ugly -2). The purpose of having two extra scenes at the beginning was to make the participants familiar with the photo rating procedure, whereas the two extra photos at the end of the photo-questionnaire served to prevent the participants from anticipating, which could render them easier. Finally, the images were calculated using the formula below.
Survey Population and Sample Size
The most relevant formula and a suitable solution would be the formula proposed by Mitra and Lankford (1999). This formula significantly prevents error by reducing the sampling error and increasing the confidence level, while at the same time reducing the non-sampling error. We assumed the standard deviation to be equal to 2.88, with the sampling size amounting to 300 persons. as a result, the sampling size amounted to 300 persons.
e = √ (P (1-P)/n); P = 50% and e = 2.88% 2.88% = √ (50 %( 1-50%)/n) → n = 300
Sampling Method, Survey Duration and Data analysis
During the spring months 2018, 300 entrance in Saqqez City users, aged 18 to 75, were randomly selected to answer a questionnaire containing 20 questions, using the booklet. The questionnaire was distributed every day at 8 am to 8 pm. These hours constitute the most frequently visited times of urban entrance. The data collected from the questionnaire survey were analyzed using the Statistical Package for Social Science (SPSS), no. 20.
Discussion of Results
Examine people's preferences
The mean of the dependent variables of the research required to create an appropriate environment and to improve the quality of the environment are "public service, tourist, traffic, law enforcement, and green space. Green space with a mean of 4.40 was the top priority, and tourist destinations with a mean of 4.23 were.
Prioritizing independent variables from people's perspective
Friedman's test was used to prioritize independent variables from the viewpoints of indigenous people, travelers, and tourists in Saqqez City. Prioritizing independent variables is the indicator that it can have a positive impact on different applications within the city's entry range of those users. Green walkways in the range with an average rating of 8.20 as the first proper use of the entrance axis could have the most impact, creating parks or recreational or resorts with an average rating of 8.12 was the second most preferred, but there are repair shops and industrial applications with a mean rating of 2.62 was the lowest preference. The results also showed that the priority of independent variables of people is completely different and not at a level where the mentioned test was significant at the error level of 0.05 (P < 0.05).
People's preferences for independent variables according to demographic characteristic
People's preferences for independent variables were adjusted according to age, education level, marital status and residence in the form of sequential variables. Kruskal-Wallis test for age and level of education was used to compare the independent variables of the study, and the Mann-Whitney test for marital status and residence was used to compare the independent variables of the study. The results show that the choice of some variables (95% and 99% confidence level) was significant, which means that people with age, education, marital status, and different residence have the same priority in relation to variables. Top of form
Mean Description of Preference
Respondents' preferences at the entrances to Saqqez show That scenes 12, 16, and 34 are the most preferred scenes for the City entrances Saqqez. Sanandaj entrance Scene 12 (M = 3.50, SD= 1.050, pt=269) followed by bukan Entrance scene 16 (M = 4.08, s. d= 0.943, pt=324) and baneh Entrance scene 34 (M =4.06, SD= 0.929 pt=319). The favorable criteria natural landscapes, wide visibility, the presence of green spaces, Plant, elements and urban signs and service use in the desirability of spaces are important factors. But at the entrance to Sanandaj Scene 2 (M = 1.32, SD= 0.173, pt=-503) followed by bukan Entrance scene 15 (M = 1.40, s. d= 0.767, pt=-480) and baneh Entrance scene 32 (M =1.151, SD= 0.832 pt=-448) have the least preferred.The presence of visual turbulence by the waste collection center, range vendors and industrial applications, environmental degradation, lack of green space and lack of identity were the least effective preference. Bottom of Form
Conclusions
According to the results obtained from the present study, suitable land uses have been selected by the people from the perspective of Green walkways as the first priority of land use planning. In this regard, various studies show that green walkways or green trails contribute to the provision of multiple ecosystem services, protection, and conservation of biodiversity in cities. Tourists and travelers in the city of Saqqez have chosen the parks or recreational parks as a second priority in landscaping the entrances. Urban parks have been one of the most important cities. Top of form bottom of Form Urban parks are the main points of the cities. Green spaces, especially urban parks, give the community a wide range of environmental, psychological, social and economic benefits depending on their performance. The third priority of the people to use in landscaping entrances is "health centers". Health is one of the first basic needs of human societies for health and can be said to be an important part of one's social needs. Therefore, equal access to the primary health services for all social and economic groups of security and control with the aim of improving the quality of life and health of citizens is of the most important duties of Governments.
The lowest priority of the people is among the users from the perspective of entrances to "repair shop and industrial applications". Research has shown that the establishment of industrial and repair shops at the entrance axis is unauthorized due to the visual pollution they create, and it is suggested that they are transferred to the second layer. Or that these observations are covered with vegetation. Previous studies have demonstrated that different people could have different perceptions of landscape visual quality. Socio-economic and demographic characteristics significantly affect individuals’ preferences. Landscape preferences show in the entrances of cities, the existence of handmade objects such as houses, buildings in agricultural farms and index changes affect the preference of negative impact, but water, plant cover, shrubs, and trees have a positive impact on the viewpoint and study of verification of this issue.
Urban Planning
Akbar Rahimi
Abstract
Introduction In recent decades, research on land use/land cover change has become an important aspect of global change, or global warming studies, since land use/land cover change is a major factor for global change because of its interactions with climate, ecosystem processes, biogeochemical cycles, ...
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Introduction In recent decades, research on land use/land cover change has become an important aspect of global change, or global warming studies, since land use/land cover change is a major factor for global change because of its interactions with climate, ecosystem processes, biogeochemical cycles, biodiversity, and, even more important, human activities. Dynamic urban change processes, especially the tremendous worldwide expansion of urban population and urbanized area, affect natural and human systems at all geographic scales. Todays, the rapid growth of urban areas has led to complex problems, including traffic congestion, environmental pollution, reduced open space, the deterioration of old downtown centers, and unplanned or poorly planned land development. Urbanization both in population and spatial extent, transforms the landscape from the natural cover types to impervious urban lands. This phenomenon is one of the most important factors that changes land surface leading to modification of receiving environments which are usually composed of natural cover. Rapid urbanization in recent decades and land use changes in urban periphery especially in big cities are the fundamental challenges of sustainable development in the world. Increasing of urbanization tendency and rural – urban migration, unsuitable management of urban development caused that the green spaces and gardens in urban periphery and in inner areas changed to urban profitable land use and especially residential areas. In this research urban expansion and rapid urbanized areas and effect of these challenges in urban green spaces are analyzed. Methodology To address these urban problems and to identify approaches for sustainable development, many researchers have focused on evaluation urban land-use changes. In this research, we selected Tabriz City for analyzing as a case study. Urban green spaces changes in Tabriz analyzed using Landsat satellite images for past decades. Satellite remote sensing provides an important source of land use/land cover data and can be utilized to monitor the changes in these data efficiently. In the first, we were made geo reference and necessary correction for satellite images and then we classified images using Erdas imaging 2014 software. For Quantitative assessment, the maps export to Arc GIS 10. 3.1 Software and finally, the green spaces land use maps and tables are produced. For analyzing green areas in future, green spaces changings in 1410 are modeled using Artificial Neural Network (ANN) base of past changes pattern. Artificial neural networks are able to approximate accurately complicated nonlinear input–output relationships. Like their physics-based numerical model counterparts, ANNs require training or calibration. After training, each application of the trained ANN is an estimation of a simple algebraic expression with known coefficients and is executed practically instantaneously. The ANN technique is flexible enough to accommodate additional constraints that may arise in the application. Results and discussion Result show that, urban expansions to per-urban and especially in green areas and orchards have been made major changes in urban green spaces. Evaluation of green space areas from 1355 to 1385 show that the green areas are decreased from 5916.53 to 4373.96 hectares. In 30 years periods, 1542 hectares of green areas destroyed and percent of green areas in Tabriz limit, reduced from 23.31 to 17.23. The land use changing in this period has been slowly. But, the green rate damages, in last decade is too fast and urban green areas in 1395 is 1709.02 hectares that contain 6.73 percent of city limit (25000 hectares city limit). In last decade, 2664 hectares in Tabriz green spaces, change to other land use and especially in 1385 to 1390 the rate of changing was faster and most of 50 percent of green areas in this period are demolished. In ANN modeling results, Tabriz will lose 1076 hectares of green areas from 1395 to 1410. Conclusions Therefore, the results indicate that the lack of proper planning of Tabriz's urban development in the last half century and especially in the past decade has caused irreparable damage to the green spaces of Tabriz, and will continue the trend in the coming years will threaten sustainable urban development and ecological balance of Tabriz city
Urban Planning
Mir satar Sadrmosavi; Mohammadreza Pourmohammadi; Akbar Rahimi
Volume 19, Issue 54 , February 2016, , Pages 189-209
Abstract
Urban sprawl and land use changes are one of the fundamental challenges facing urban planning in recent years. Therefore, modeling these changes is considered as an important tool by planners, economists, ecologists and environmentalists. This paper is an attempt to apply the Land Transformation Model ...
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Urban sprawl and land use changes are one of the fundamental challenges facing urban planning in recent years. Therefore, modeling these changes is considered as an important tool by planners, economists, ecologists and environmentalists. This paper is an attempt to apply the Land Transformation Model (LTM) for urban land use changes in Tabriz based on artificial neural network and a geographical information system for the in prediction of Tabriz future development. Methodology in this paper is descriptive-analytic and the data are produced from satellite images, urban land use maps and approved plans for Tabriz. For preparation of data and analysis, ERDAS imaging and ArcGIS software, and for training test, simulation and the probable prediction map, LTM software are used. Results in training process, from 1989 to 2005 shows that 21469 cells (50*50 m) were expanded in 16 years period which is according to the real developed area in the same period and this result shows optimum training network. For prediction of probability map, we used Tabriz population and land use per capita was estimated in regional plan of Tabriz, and results illustrate 22484 cells changing until 2021 for future development. The results of the model, have predicted the most developed areas in the northwestern, east and south-east aspects and continuing this process would destroy green spaces, agricultural lands surrounding the city and threaten the environment. Thus, with this expansion, 8437 ha of green spaces and periphery areas will go on the built area. Continued sprawl development not only will destroy urban environment in periphery areas, but it also will disrupt spaces in Tabriz and there by will increase urban development costs such as infrastructure services.
