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Modeling Agricultural Destruction Lands Resulted By Urban Growing in Suburb of Urmia City by Applying an Object Based Image Analysis Approach
2016
Feizizadeh, Bakhtiar | salmani, Saeed
In the present research land use changes modeling in the Urmia city is considered in order to detect changes in agricultural lands. In this regard, Landsat satellite images were used and then the object base processing satellite images was performed by applying the process segmentation and in the next stage, the optimization of scale segmentation and image analysis to its constituent elements, the object basic algorithms according to the physical condition, geometric of each land-use classes were used. During images processing in addition to spectral data, the data in the form of homogeneous, shape and texture (GLCM) were used for land use extraction. The results show that the Urmia city had so many physical expand in the past 31 years so that its area has increased from 7.43% of the total study area in 1363 to 30.75 in 1394. This increase was rectify by the reduction of agricultural lands so that large amount of agricultural lands have been used for construction purposes which has caused land degradation, particularly fertile lands in this area, particularly within the Shahr chay river, Mahabad road, Sero road, Darya road and the road of Salmas.
显示更多 [+] 显示较少 [-]The Lattice Hexagon Approach Applied in Landscape Degradation Assessment (Case study: Shemiranat County)
2016
Irankhahi, Mehdi | Jozi, Ali
The present study has been conducted on Shemiranat county landscape, using lattice hexagon approach, for the first time, in order to achieve homogeneous units in degradation model. To this aim, with respect to the extent of the studied area, a lattice hexagon composed of 36 units (cells) was created and each grid cell was considered as a sub landscape. Next, ecological vulnerability, degradation agents and their severity was calculated for each cell, using landscape metrics and then classified and standardized based on fuzzy logic. Eventually, according to the obtained degradation coefficients, landscape zoning and analysis was done. Overall, 73 percent of the Shemiranat County was identified as with low degradation area which is developable with paying attention to ecological restrictions and buffers (distance of river valleys, main faults and protected areas). Also, 23 percent and 4 percent of the studied area was determined as need rehabilitation and needs protection, respectively. Using the lattice hexagon as the basis of landscape degradation assessment, in addition to more accurate calculation of metrics and estimation of the degradation coefficient, separately for each homogeneous cells, landscape degradation status and future development potential will be determined.
显示更多 [+] 显示较少 [-]Comparative Study of the First and Second Generations of the New Towns Development: The Case of the South Korea
2016
Arbab, Parsa | Basirat, Maysam
This article, with a focus on the change and transformation process of the approaches and trends affecting the new towns policy, scrutinizes the first and second generations of the new towns in reference to the South Korea as a case study. The first generation of new towns development in South Korea is associated with the rapid growth of urbanization, industrialization and subsequently economic increase of this country. Lack of housing and inadequate housing supply, formation and growth of the informal settlements especially in connection with Seoul, and the subsequent centralization in the Seoul metropolitan area are the main and significant urban challenges of South Korea in this period. The second generation of new towns has been planned first with the aim of housing supply as their main function in the capital region. These cities are the result of approach that follow the qualitative, gradual and planned development in the form of small scale but multiple projects compared to the past. Decentralization of Seoul and Seoul metropolitan area, integrated regional development, and ultimately the balance of South Korea’s national territory are the key purposes of this process, in terms of spatial planning.
显示更多 [+] 显示较少 [-]The Determination of Optimal Areas for the Development of New Towns and Cities Using Efficient Models (Case Study: Tehran Province)
2016
Pour Ahmad, Ahmad | Farhadi, Ebrahim | Ghorbani, Ramin
One of the critical issues related to sustainable urban in twenty-first century, is the growth and development of the city in space and on this basis, the civil management was forced to think about urban development. Tehran metropolis with its growing, developing immersive and without physical, environmental instability surrounding the statue has arrived. One of the ways for decentralization and redistribution of the population and facilities thought in spatial planning is the, urban development and building new settlements around the metropolis which must meet the criteria of environmental, social, economic, physical, geographical distance, etc. be considered in studies not lead to environmental catastrophes. The method of this research is descriptive-analytical and its target is applied using the K-means and FCM's clustering methods to check this important. To evaluate the quality of the environment and determine optimal sites for the development the new cities in Tehran province in 3 pm base (man-made environment, social environment, economic environment and the natural environment) with a total of 22 indexes are used. The analysis and processing of indices for the paper two environments Matlab2013 and Arc GIS software was done. The results of clustering using FCM and overlay in the form of maps showing which areas are suitable for urban development in the East and South of Tehran. Also the plan was prepared by K-means that we can be used to provide strategies and integrated management areas.
显示更多 [+] 显示较少 [-]Associate Professor, Faculty of Urbanism, University of Tehran, Iran
2015
Noorian, Farshad | Vahidi Borji, Goldis
In Iran, Urban land use planning is done in format of the comprehensive and detailed plan but, even after near fifty years of development of land use plan, there are still critiques together with some revisions in legal proceedings, content and procedures. This article is a study of evaluation of urban land use planning in current decade and specifically assesses urban land use planning in Bojnord’s detailed plan with indices of Place check and Needs assessment. Results of Placecheck indicate that only 7.92 percent of proposed land uses are fulfilled, while 34.8 percent have been abandoned and 57.28 percent underwent change of land use. Therefore, it can be concluded that Placecheck of uses has played a very small role. Result of Needs assessment index also signifies that 47.61 percent of the surface areas have realized proposed use. This shows that Needs assessment has equally failed but, compared to the other index, a flexible locality of uses contributes to realization of proposed plans. In the following and in form of interviews with executers, various obstacles on the way of realization, problems like land ownership, insufficient correspondence between planners and executers, and inadequate legal surveillance and obligations were indentified.
显示更多 [+] 显示较少 [-]The Strategies of the land use in Border Regions Based on the SWOT-AHP and SWOT-ANP Models Case Study (Sistan and Baluchistan) AboollFazl Ghanbari 1*, Ayoub Sardari2, Arash
2015
Ghanbari, AboollFazl | Sardari, Ayoub | Zand karimi, Arash | Zand karimi, Sheyda
The aim of the present study is to represent the strategies and approaches to develop the border areas of Sistan and Baluchistan Province. The research method was descriptive-analytic. Furthermore, the study was an applied research, documentary and field studies were the methods of data collection, and the research was performed in the form of questionnaire. The validity of it was reviewed and confirmed by 20 experts (experts in urban and rural planning, and land use). The model used in this research was a hybrid model of SWOT-ANP and SWOT- AHP. Thus, the capabilities and limitations of the land use of border areas were measured. In terms of development, has been made. To reach this goal, by using the technique of SWOT, the strengths and weaknesses (internal factors), and the opportunities and threats (external factors) were identified. By the use of ANP and AHP models, the external and internal factors were examined to adopt the best strategy (SO, WO, ST, and WT). The findings indicated that in the SWOT-ANP model, the SO strategy with the score weight of 0.28152, and the ST strategy with the score weight of 0.26573 were chosen as the most important strategy, and as the alternative strategy, respectively. Moreover, in the SWOT- AHP model, the ST strategy with the score weight of 0.705, and WO strategy with the score weight of 0.601 were chosen as the most important strategy, and as the alternative strategy, respectively.
显示更多 [+] 显示较少 [-]Calculation of Ecological Conformity Urban of Development in Gorgan
2015
Hajizadeh, Fatemeh | Mirkarimi, Seyed Hamed | Salman Mahiny, AbdolRasoul | Mohammadzadeh, Marjan
Today, with the rapid growth of urban population and as a result, rapid and unbridled urbanization of human societies have been caused some issues. In Gorgan, an increase in level of urban settlements is done regardless to the capabilities and limitations of land and ecological potential of urban development. In this study, it is performed to evaluate and conform to urban development, regard to ecological capability to protect the environmental ability of Grogan. In this case, the multi-criteria assessment approach with weighted linear combination of the GIS is performed to evaluate the ecological capability of Gorgan for conformity to urban development in different years based on the criteria. Then, there is a comparison between final map of capability and current development; moreover, the rate of conformity in different years is calculated. It is illustrated that the ecological conformity had been decrease gradually from 1987 to 2013, which causes hazardous effects on the environment that seems to be still remain for years. Therefore, reduction of the ecological noncompliance should be considered by relevant authorities. The outputs could be used for urban planners to observe the environmental principles to promote existing conditions.
显示更多 [+] 显示较少 [-]Urban Environmental Quality Assessment by Using Composite Index Model Case Study (Tehran Metropolitan Area)
2015
Robati, Maryam
Quantifying the performance of national policies and programs in different economic, social, and environmental fields has always been a major concern of planners, politicians and researchers worldwide. According to UN statistics, more than 60% of the world population will live in urban areas by the year 2030Despite occupying only 2% of the total land area on Earth, more than half the world's population is living in cities. In this study, a systems approach was adopted to develop a composite index in order to assess the potential of a city to become sustainable. The index is composed of 10 components containing a total number of 19 indicators. According to which, the 22 districts of Tehran City were compared in terms of sustainability of urban environment quality. The obtained results indicated that the Districts 1, 2 and 3 are in ideal sustainability conditions. These areas are among prosperous places of the city. About 59.09% of all districts were below the average. The Districts 18 and 19 with the values of 0.21 and 0.25 remain in critical condition.
显示更多 [+] 显示较少 [-]Analysis of Spatial Matrix of Regional Development gGap in Markazi Province
2015
faraji mollaie, amin | Aliverdiloo, Hadi
Today, unequal regional development is concerned of many developing countries, such as Iran. Centralization, inequality in the distribution of population, activity and natural and human resources and inequality between the regions are including factors and obstacles to regional development in the country. Study the undeveloped cities and areas to set priorities for planning and eliminate the regional development gap is the first step in the process of decision-making for deprivation deprived areas. The regional comprehensive develop approach need economic, social and environmental factors base on human and environment conditions according to each region. The aim of this study is to identify undeveloped county and analysis to investigate the causes of inequalities (gap) in the Makazi counties, according to 14 indicators of economic, social, health and cultural. The research is based on objective, practical resaerch and method of paper is descriptive-analytical. Collecting method for data (1390) is a library (documentary method). In this study for analysis and ranking of counties is used multi-criteria decision method. Based on the results of the models HURWITZ, Maxi max, Maxi min, ELECTRE and show it on a map in GIS; Arak and Saveh are developed, Sazand, Delijan and Khomain are developing and Tafresh, Mhalat, Zarandiyeh, Ashtian and Komijan are developed counties. In general, in the Markazi province formed two separate regions. One is in the southern part of the province (Markazi) and the other in the northern part of the province of Arak (Saveh).
显示更多 [+] 显示较少 [-]Geopolitical Analysis of the Demographic Changes Necessary and Spatial Planning Policy Making in the Field of Geographical Distribution in Iran
2014
Pishgahi Fard, Zahra | Yazdan Panah, Kyomars | Rezvani, Mohammad Reza | Rashidi, Mostafa
Iran needs population growth in order to achieve high weight in the region and world as well as to obviate peripheral threats. Iran's area is so vast that it can accommodate more population than the current population. The country having population density of 46 individuals per square kilometer ranks 162 in the world. However, quality and efficacy are necessary for a population to lead high weight. Therefore, it has been attempted in this research to explain necessity of population growth of the country geographically; and to study optimization of indices for these changes and policy making in order to lead the changes in the framework of the land preparation plans. The research questions are: Which indices are considered as priority from the view point of the land preparation, concerning the population growth; and which areas and provinces are more apt to accommodate more population? General purpose of this study is to consider crucial land preparation indices in population growth policy and to prioritize provinces based on the indices. The research method is descriptive-analytical.
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