Showing 8 results for Zangane
Syrus Ahmadi Nohadani, Hossein Zanganeh Shahraki,
Volume 31, Issue 4 (3-2017)
Abstract
Development requires production of wealth and this is dependent on economic growth in a competitive space. Spatial distribution of wealth, population and the independence amount of big cities are now affected by globalization processes all over the world. One of the consequences of globalization is that the domain of intercity relationship and urban networks has improved to international level. One of the fundamental problems of Iran is local thinking and lack of global thinking. The geopolitical changes of recent decades have been so fast that they have surprised political decision makers and have actuated them to adopt reactive approaches to deal with them. Regularization and management of Tehran as the capital and main center of government in Iran and given the roll that it plays in the region and the world, it can not be free of global developments and out of globalization processes. Any attempt at optimal management of Tehran would not be successful without attendance to the components and features of globalization.
Fatemeh Hajari, Yaghoob Zanganeh, Alireza Hamidian,
Volume 33, Issue 2 (Summer 2018)
Abstract
Introduction and Background: The issue of identity in general and urban identity in particular has a great importance because of the role that play in recognizing individuals, objects, communities and places. In spite of the importance of this issue, urban identity crisis is alarming in recent times. Natural elements, physical and socio-cultural components are three main elements identifying that conditions and characteristics of each of them determining their role in the identity of the city.
Aims: The main purpose of this study is investigate and identify the urban identity component of Sabzevar with emphasis on identifying the mentioned factors by citizens.
Methodology: This research method was of descriptive-analytic type. The data were collected through a document (library) method and a survey (questionnaire) method. The statistical population has been people over 15 years old of Sabzevar, who had been residence in this city for at least 5 years. The research units is Individual and samples are obtained using by Cochran formula a sample of 384 people.
Conclusion: The results show that on the basis relative frequency of recognized elements by the respondents, according to the group of synthetic and physical components with 44.21 percent, natural components with 30.29 percent and the human factor (25.49 percent) to be accounted as the most significant components of identity of Sabzevar city. Also citizens place attachment as one of elements of identity which is more than average level. Another result of this study is that among the 30 physical element of streets, squares and parks named by respondents, with the exception of 2 cases that are located in the city new part, the rest have taken place in old and central mid regions. In addition, these results indicate that there is no significant difference between the knowledge of residences regarding identity elements of physical and built environment of the city
Sima Poorhashemi, Abolghasem Ami Ahmadi, Mohammad Ali Zangane, Mahdi Salehi,
Volume 34, Issue 1 (Winter 2019)
Abstract
Background and Amis: One of the phenomena in arid and semi-arid regions is dust storm. Dust is one of the environmental issues that affect the quality and pollution of the air, human health, soil fertility, visibility, economy, and many social and environmental aspects of the community.
The present research has been carried out to identify and characterize the areas of dust source in Khorasan Razavi province during the period (2005-2016).
Methodology: In this research identified 65 dust source in case study with use MODIS image. Then, the characteristics of these points were studied in terms of soil, slope, elevation, vegetation index (NDVI), lithology and land use.
Findings: The results of the characteristics of dust sources showed that 63 percent of the points in the land use area were located at the levels related to the poor pastures (23 points) and dry land (18 points). In the slope layer, 43.07 percent of the points are located on the 0-2 percent floor and in the soil layer 49.2 percent of the points are on the floor of the Eridisol, which includes 39.2 percent of the area of the area. In the NDVI layer, 98.4 the percentage of points that cover about 99% of the area of the area is related to the non-vegetation section, and in the layer related to the elevation points, 90% of the points (60 points) are located in the altitudinal area of 0-1500. In relation to the lithology of the region, discontinuous sedimentary units with an area of 49.56 are about 66.15% of the points.
Conclusion:The results indicate that most of the dust source areas are located in weak pasture land use and rainy land with erosive soil and lithology that has poor vegetation cover.
Malihe Mohamadnia, Abolghasem Amirahmadi, Mohamadali Zanganeasadi,
Volume 34, Issue 4 (autumn 2019)
Abstract
Aims & Backgrounds: Considering the fact that a large part of our country is in arid and semi-arid regions and every year wind erosion and dust storms cause significant damages to the country's bio-economic resources, it is necessary to study this phenomenon. This study investigated the erosion rate of geomorphological facies of Gonabad city in relation to wind erosion.
Methodology: The wind erosion intensity was determined using wind tunnel and experimental model of IRIFR1. In the region, 17 facies were identified and mountainous and non-covered areas and areas that were not potentially dusty were excluded from the study. Sampling operations were performed on the remaining 14 facies. The samples were weighed and placed in a wind tunnel at 10 m / s for 10 minutes and then weighed again.The weight difference indicates the amount of wind erosion from a given level.Also in the IRIFR1 model 14 facies were weighted according to expert opinion.
Findings: According to the results of wind tunnel, wind erosion in the study area was highest in sand dune facies and in low and high plains and relatively high water erosion was lowest and according to IRIFR1 model in sand dunes was highest and in low and high plains and low water erosion and high pebbles were the least. Wind erosion sensitivity map was prepared in the study area and divided into five classes of rock mass and non-erosion, very low sensitivity, low, medium and high sensitivity.
Conclusion: Given that according to the analysis of samples in the wind tunnel, more than 28% of the area is in the medium to high sensitivity class, applying soil protection techniques against wind erosive power such as windbreakers, seeding and grazing reduction in these areas (especially the area Northwest) seems necessary.
Y. Zanganeh, M. Boroughani,
Volume 36, Issue 2 (Spring 2021)
Abstract
Aims: A dust storm is a phenomenon caused by particular conditions such as harsh wind, dry air and bare soil that is prone to erosion. The Sistan region in the southeast of Iran is one of the most affected areas by dust storms. This study was conducted to analyze the relationship between dust and rural population changes in the Sistan region (including 5 cities: Zabol, Helmand, Zahak, Nimroz and Hamoon) over the past 25 years (1991-2016).
Methodology: This is a descriptive-analytical study and the required data are collected through desk studies using demographic statistics and satellite images. The collected data were analyzed using descriptive and inferential statistical analyzes including correlation coefficient tests.
Findings: The results of comparing the rate of rural population growth in the studied area in Sistan and Baluchestan province showed that in all 4 time periods (1991- 1996, 1996-2006, 2006-2011, and 2011-2016) the annual rate of rural population growth in the studied area had been significantly less than the annual rate of the province's rural population growth. Furthermore, the results of the study showed that there is a significant negative relationship between the average number of dusty days in the region in all four studied periods and the average annual rate of rural population growth in rural areas.
Conclusion: according to the findings of the current study, it can be concluded that the villages' potential to keep the population is highly dependent on natural conditions, especially sand and dust storms as a result of successive droughts in this region.
A. Sanaifard , A. Amirahmadi , Y. Zanganeh ,
Volume 37, Issue 1 (Winter 2022)
Abstract
Aims: Flood forecasting is considered through land use and building density in most urban designs, whereas this method has not been very successful based on the experiences. This study aimed to propose a proper method for flood forecasting in Sabzevar city, emphasizing the relationship between the parameters of hydrological models, urban development, and the scenarios considered in the comprehensive plan of 2005-2006 in Sabzevar city.
Methodology: This research is applied and descriptive-analytical in terms of the aim and method, respectively. The data were collected using documentary and field methods. The flood susceptibility map of Sabzevar city was prepared using the SVM model. The model was validated using the ROC curve. The basin’s hydrology was studied using the Sabzevar Synoptic Meteorological Station data from 1358 to 1398. Urban hydrological models and Geographic Information System were used to predict the runoff during different urban development scenarios in the return periods of 2, 5, 10, and 25 years.
Findings: Due to the higher building density, the susceptibility to flooding risk vulnerabilities is higher in districts 1, 2, and 3 of Sabzevar city ROC showed the acceptable validity of the SVM model (AUC=0.9123). Surface runoff forecasts for the return periods and different scenarios indicate that the channels are not proper for runoff transmission.
Conclusion: It is very important to pay attention to the ratio of permeable and impermeable surfaces in comprehensive plans in order to prevent flooding. The SVM method is sufficiently compatible with Iranian conditions and can be used in similar conditions.
H. Ahar, A. Zanganeh, Ali Khaksari Rafsanjani, T. Karami,
Volume 38, Issue 4 (Fall 2023)
Abstract
Aims: Urban transportation infrastructure and land use system have reciprocal impacts on one another. However, extant research emphasizes the role of land use in the development of the urban transportation system, while the influence of transportation infrastructures on urban expansion has been predominantly neglected. Hence, the objective of the present investigation was to examine the role of urban transportation infrastructure on the constituents of urban growth in the city of Tehran, employing time-space trends with a particular focus on intra-city highways.
Methodology: The current "explanatory-evaluation" study was carried out using transportation and traffic data from Tehran city spanning the period of 1995-2020. Through the establishment of a quantitative analysis methodology based on shared indicators between transportation and urban growth, data collection and analysis were conducted in four sequential stages.
Findings: The impact of highways on the urban expansion of Tehran has been identified across various significant dimensions. These include the establishment of a center-periphery configuration of population density, the controlled development of transportation infrastructure, extensive functional transformations in peripheral regions, the emergence of secondary functional nuclei on the outskirts of the city, and simultaneously, increased centralization in the core of Tehran's Central Business District. Additionally, there are indirect repercussions on land prices and real estate. These collective tendencies have ultimately culminated in the formation of an integrated metropolitan area.
Conclusion: To effectively manage and regulate urban growth, it is imperative to strike a balance in the role of the urban transportation system. This entails the amalgamation and harmonization of urban transportation policies with land use policies. This integration should be embedded within the framework of urban development plans, including comprehensive and detailed urban plans, as well as other management strategies. Furthermore, the control of urban growth must be given due consideration.
A. Sheikhi, H. Hataminejad, S. Zanganeh Shahraki, A. Pour Ahmad, H. Mirzaei,
Volume 39, Issue 1 (Winter 2024)
Abstract
Aims: Presently, to establish a conducive residential environment, enhance the commercial landscape, effectively manage resources, maintain cultural identity, and instill optimism among its inhabitants, Tehran metropolis necessitates an enhanced utilization of resources and the implementation of various novel solutions to address prevailing and emerging challenges. The primary objective of this study was to assess the urban innovation status of Tehran metropolis.
Methodology: The current research is pragmatic in its objectives, exhibiting a mixed methodology approach and employing a descriptive-analytical survey method. Data was gathered through semi-structured interviews and questionnaires devised by the researcher. Subsequent to the coding and examination of the interviews utilizing thematic analysis, the outcomes were incorporated into a researcher-developed questionnaire for the evaluation of Tehran metropolis, with the data being scrutinized using SPSS software.
Findings: The efficient institutional framework and transparent laws, along with the financial-institutional policies of the government, the level of citizen participation, the presence of parent universities, a pool of creative and expert human resources, the existence of technological and innovative companies, access to diverse markets, well-developed urban innovation infrastructures, a unique city brand, the strategic city location, and the quality of life are all crucial factors that can be used to assess the state of the Tehran metropolis. Among these factors, the parent universities, strategic location, human resources, and city brand exhibit a more favorable condition.
Conclusion: The current situation of the Tehran metropolis does not appear to be very conducive in terms of urban innovation and its functionalities. Optimal conditions for the adaptation of such systems to the Tehran metropolis are also not adequately observed.
