نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه ژئومورفولوژی، دانشکده جغرافیا، دانشگاه خوارزمی، تهران، ایران
2 پژوهشکده حفاظت خاک و آبخیزداری، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران.
3 گروه ژئوپلیتیک، دانشکده جغرافیا، دانشگاه عالی دفاع ملی، تهران، ایران
4 گروه فناوری اطلاعات، دانشکده منابع سازمانی، دانشگاه علوم انتظامی امین، تهران، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Aim: Land subsidence is an invisible danger that has faced many cities in the Iran, including Pishva, with a serious challenge. The importance of the issue of subsidence has led to the evaluation of the amount of subsidence in the urban area and outskirts of Pishva using radar images and SBAS time series method (2020-2022) in this research.
Material & Method: In this research, Landsat satellite images, Sentinel 1 radar images and library information have been used as research data in order to achieve the desired goals. The working method has been that first, using satellite images, the trend of land use changes in the region has been evaluated, and then, based on the available information, the state of the decline of underground water resources in the region has been investigated. In the following, the subsidence rate of the region has been calculated using the SBAS time series method.
Finding: The results of this research have shown that the studied area has subsided between 107 and 411 mm during a 2-year period (2020 to 2022), based on which it can be said that the maximum annual subsidence of the area is more than 20 cm. It is a meter. the results of the evaluation of land use changes in the region have shown that during the period of 30 years (1991 to 2021), the landuse of man-made areas has increased from 2.2 to 9.6 square kilometers and also the level of piezometric wells in the region have faced an annual drop of more than 1 meter.
Conclusion: Considering that the development of man-made uses is associated with an increase in the pressure on the earth's surface, and also the development of residential and industrial areas is associated with an increase in the use of underground water resources, so the changes landuses during recent years, the context has provided for subsidence in the region.
Innovation: Due to the high precision of the method used, the results of this research can be used for various construction planning.
کلیدواژهها [English]