جمیله توکلی نیا

INTRODUCTION: The structure of the urban platform of Tehran and its physical characteristics depends on the inherent conditions and environmental thresholds in relation to changes. This study aimed to determine the natural landscapes of Tehran by two phenomena of earthquake and flood that posed the highest risk in different periods of this city. Therefore, the natural perspective of Tehran is divided into three perspectives of north, central, and south regarding the inherent features and evolutionary process. METHODS: The relationship between the perspective of Tehran based on the form and geomorphological processes and the evaluation of earthquake and flood hazards have been observed in four stages, which included data collection, data processing, calculation of indicators, and analysis of findings. The studied area was divided into three northern, central, and south urban landscapes to determine the resistance thresholds of the city according to the characteristics of topography, physiography, geology, the results of field studies and satellite images, aerial photographs, as well as paleogeomorphological research in Tehran. FINDINGS: According to the zoning map of Tehran based on the earthquake phenomenon in three perspectives of north, center, and south, the highest distribution of non-resistance is observed in the northern and southern areas of the city. Northeast, southwest, and semi-western regions have the highest urban resilience to earthquakes. Moreover, regarding the zoning of Tehran based on the flood phenomenon in the three perspectives of north, center, and south, the highest distribution of non-resilience has been observed in the northern regions of the city. Northeast, southwest, and west of Tehran have the highest urban flood resilience. CONCLUSION: Based on the results of the present study, in order to increase resilience against the risks of earthquakes and floods, the city of Tehran should be studied not in just one perspective but in different perspectives.

Purpose - The rural-urban integration refers to an optimal combination of natural, economic, social, and spatial factors. The scale of this integration depends on the extent to which urban and rural systems (economic, social, and environmental) influence, interconnect, complement, and share benefits. The main goal of this study is the environmental analysis of villages in the periphery of Farsan city based on the rural-urban relationship. Design/methodology/approach- This is an applied study that uses a descriptive-analytical method. Data were collected using a questionnaire. The statistical population of the study consists of the four villages in Farsan county with a population of over one thousand people. Together, these four villages are home to about 4285 households (14972 people) from which a sample of n=375 was selected using Cochran's formula. Finding - The results of the research based on the one-sample t-test indicate an environmental relationship between Farsan county and its nearby villages. The environmental indicators such as noise pollution and non-expansion of green space, the change of cultivation pattern, the intensified land abuse and brokerage, the reduced share of water in agriculture, and the limited environmental knowledge of villagers suggested adverse effects whereas other variables manifested the positive effects of the connection with Farsan on improving the environment of the nearby villages. The results of regression analysis showed that the environmental relationship of Farsan with its surrounding villages explained 17% of study indices (environmental health, land-use change, water and soil resources, knowledge and importance of environmental issues) and the remaining 83% was explained by other factors not addressed in this study. Research limitations/implications - The main limitation of the study was the scant literature on the environmental effects of the urban-rural relationship. Practical implications - Implementing a suitable cultivation model for agricultural products, expanding new irrigation systems, maintaining and reviving orchards, and raising awareness of environmental issues among villagers should be put on the agenda. Originality/value - Investigating environmental effects of the urban-rural relationship as a way of ensuring sustainable rural settlement and environmental protection in the study area.