Remote Sensing and GIS Applications in Environmental Sciences

Evaluation of the urban leap of areas prone to city development with an emphasis on earthquake risk (case study: Zanjan city)

Document Type : Original Article

Authors

1 Master of Urban Planning, Department of Urban and Rural Planning, Faculty of Geography and Environmental Sciences, Hakim Sabzevari University, Sabzevar, Iran.

2 University of Isfahan, Isfahan, Iran

3 Assistant Professor of Urban Planning, Department of Urban and Rural Planning, Faculty of Geography and Environmental Sciences, Hakim Sabzevari University, Sabzevar, Iran.

10.22034/rsgi.2024.62028.1080

Abstract

using Landsat series of monthly images, urban land use maps for the years 1986 to 2020 were evaluated and maps of land use changes in Zanjan city were obtained. In the next step, considering the importance of earthquakes in Zanjan city, the number of earthquakes that occurred in the study area up to a radius of 200 kilometers was investigated using GIS software, and in the final step, using two models, AHP and FUZZY, and using From the important parameters such as depth, strength, distance from the epicenter, slope, height and type of building structures, earthquake risk zoning maps were obtained in the city limits. The type of research in this research is applied and descriptive-analytical in terms of method and nature. The final results show that the area growth of Zanjan city during the years 1986 to 2020 has had an increasing trend (more than two hundred percent), so that the growth of urban areas has reached from 17.56 square kilometers to 50.65 square kilometers, and the results From the statistical study of earthquakes, it shows that in the last hundred years, 276 earthquakes occurred within a radius of 200 km of Zanjan city, the lowest of which was 3.4 on the Richter scale, and the highest of which was 7.4 on the Richter scale, and the average earthquakes The data was 4.5 Richter. Also, the results show that the growth and leap of Zanjan city has progressed to the areas with high earthquake risk in the investigated period.

Keywords

Main Subjects

Urban growth and development and changes in urban land use are inseparable parts of planning for sustainable development. The current research intends to evaluate the urban growth and leap for Zanjan city from the time dimension and spatial distribution based on the natural earthquake risk. For this purpose, using Landsat series satellite images, urban land use maps for the years 1986 to 2020 were evaluated and maps of land use changes in Zanjan city were obtained. In the next stage, considering the importance of earthquakes in Zanjan city, the number of earthquakes that occurred in the study area up to a radius of 200 kilometers was investigated using GIS software, and in the final stage, using two models, AHP and FUZZY, and using from the important parameters such as depth, strength, distance from the epicenter, slope, height and type of building structures, earthquake risk zoning maps were obtained in the city limits. The type of research in this research is applied and descriptive-analytical in terms of method and nature. The final results show that the area growth of Zanjan city during the years 1986 to 2020 has had an increasing trend (more than two hundred percent), so that the growth of urban areas has reached from 17.56 square kilometers to 50.65 square kilometers. Also, the results The result of the statistical study of earthquakes shows that in the last hundred years, 276 earthquakes occurred within a radius of 200 km of Zanjan city, the lowest of which was 3.4 on the Richter scale, and the highest of which was 7.4 on the Richter scale, and the average earthquakes were The data was 4.5 Richter. Based on the maps produced by AHP and FUZZY models, the studied area is located in a high risk zone in terms of the probability of earthquake occurrence. The most suitable direction for the development of Zanjan city is towards the south and southwest.

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Remote Sensing and GIS Applications in Environmental Sciences
Volume 4, Issue 13
February 2025
Pages 67-41
  • Receive Date: 09 June 2024
  • Revise Date: 03 November 2024
  • Accept Date: 29 December 2024