مدل سازی تغییرات کاربری اراضی فیروزآباد با استفاده از تصاویر ماهواره ای چند زمانه (مقاله علمی وزارت علوم)
درجه علمی: نشریه علمی (وزارت علوم)
آرشیو
چکیده
کاربری اراضی یکی از مهمترین جنبه های بررسی مدیریت منابع طبیعی و بازنگری تغییرات محیطی است . با بررسی های تغییرات کاربری در سیستم اطلاعات جغرافیایی میتوان عوامل توسعه فیزیکی شهر را نیز استخراج کرد که می توان به مواردی از جمله تغییرات کاربری اراضی اشاره کرد و مورد بررسی قرار داده و پیش بینی نمود.در این تحقیق با استفاده از قابلیت های سنجش از دور و و GIS تغییرات کاربری اراضی شهرستان فیروز آباد واقع در استان فارس در بازه زمانی بین سال های ( 2003-2013-2018) با استفاده از تصاویر ماهواره ای لندست (ETM , ETM+) مورد پایش قرارگرفته وسپس کلاس های کاربری اراضی ، تجزیه و تحلیل روش ها و تغییرات آنها در نرم افزار ENVI و EDRISI طبقه بندی شده است .تجزیه تحلیل و تغییرات زمانی دردوره 15 ساله منطقه مورد مطالعه نشان داد که سطح اراضی مسکونی افزایش داشته و بیشترین تغییرات کاربری در مناطق زمین های کشاورزی ایجاد شده است . بر مبنای این تغییرات ، پتانسیل تبدیلات کاربری وپیش بینی برای سال 2023 ، با استفاده روش زنجیره مارکوف مدلسازی گردید .در مدل LCM نقشه های پتانسیل تبدیل حاصل از اجرای شبکه های عصبی مصنوعی پرسپترون چند لایه با کاربری اراضی سال های 2013 و 2018 و متغیر های تاثیر گذار انجام شد . لازم به ذکر میباشد که با توجه به خشکسالی منطقه در سال های اخیرو عدم توجه و مدیریت مناسب در وضعیت هیدرولوژی و فقدان ثبات وضعیت اقتصادی از عوامل موثر بر تغییرات کاربری اراضی در منطقه مورد مطالعه میباشد .Evaluation and Modeling of Land Use Changes of Firozabad Using Multitemporal Satellate Imagery
Extended Abstract
Introduction
Today, studies and researches based on land use are carried out in order to meet the needs of the land surface with multiple uses such as agricultural land, gardens, residential areas and industrial areas, etc. Using remote sensing images as a new tool in surveying land cover and land use types, their changes over time can be checked and confirmed. In today's world and with the growth of technology, satellite observations are very important for understanding land use patterns in large areas and detecting changes over time.In recent years, the use of satellite images in determining land use and investigating the expansion of cities has been of great interest. The use of remote sensing technology with the aim of examining changes over time is an inevitable necessity. Paying attention to the adverse effects of land use change in the management of urban areas by planners using Landsat satellite image information is very useful. Therefore, due to the rapid growth of urbanization, not only a large amount of urban natural lands have changed their use, but the expansion of cities has caused socio-economic and physical use changes in the surrounding villages. Therefore, it can be claimed that the science of remote sensing is a comprehensive tool for managing natural resources and remote sensing satellites are the best and most accurate data sources for detecting, quantifying and mapping patterns of land use changes.
Methodology
First, satellite images of three appropriate time periods were collected from different sources. The data were checked for geometric and radiometric errors and were received at the L1T level. To prevent errors, by displaying individual bands and different color combinations on the computer screen, the data in terms of radiometric errors were investigated and the atmospheric correction was done in the software using the ENVI method.To check the geometrical situation, the georeferenced image was prepared from the USGS site, and the intersections and important points were checked in the ENVI software. Then, the prepared images were classified by image classification and band combination software such as ENVI 5 and ILWIS and based on ground control, the classification was done. Relevant corrections were applied according to the needs of the obtained images. Coding and combination of color images for different decades were carried out. The next step was to determine the number of desired classes for supervised classification and to determine land use, and then to ensure the accuracy of the classification, a scattered sample was collected from all the studied areas. The fuzzy logic method based on the theory of adaptability was used to classify the image and extract land use and land cover maps. Finally, using this model, a map of land use was prepared from the studied area, and to evaluate the changes, the area of each of the land use classes in each period was drawn in the form of a table.To figure out the changes in the studied area, the maps obtained from the classification of images were studied with the orthogonal table method, and the prepared user maps were compared two by two and created as a matrix. The simulation was done in the relevant software such as IDRISI, GIS. By comparing the land use of the first two decades with the third decade and using the Markov chain method, simulating and predicting the trend of land use changes for the coming years was considered as the forecasting horizon in this research.
Results and discussion
Geometrical corrections were made in ENVI software. The obtained images had no significant error and atmospheric correction was also applied. The RGB composition of the image was prepared and the desired OIF index was calculated by ELWISI software to prepare the best band composition of the images. The obtained combination was pasted together in ENVI and the desired range was classified. In addition, the images received from TM and ETM were combined using spectral bands and panchromatic bands, which have high spatial resolution, and a better image was created.
Conclusion
The 15-year study period with the expansion of built-up lands, shows the most destruction in the agricultural lands of the outskirts of the city and barren lands in the border and suburbs of the city and farming lands. This trend can lead to environmental damage and further reduction of agricultural lands in the region. Previous research and experiences show that the use of a GIS system in the field of implementation and management of land use changes, especially in agriculture, is inevitable. According to the result of the artificial neural network and Markov model and drought in recent years, it is necessary to note and manage the hydrology of the region. Also, due to the passage of two main roads, one from the southern industrial area (Southern Parian) and the other from the east, it is necessary to plan more precisely for the land uses and development of industrial and urban areas. The amount and type of cultivation in the plain lands of Firozabad need to be reconsidered so that foreseeable problems in the region can be solved before they occur. Undoubtedly, it is necessary to have a spatial database of the land use areas of the city under study, which comes from various sources, including satellite images, public information, and cadastral maps.
Funding
There is no funding support.
Authors’ Contribution
Authors contributed equally to the conceptualization and writing of the article. All of the authors approved the content of the manuscript and agreed on all aspects of the work declaration of competing interest none.
Conflict of Interest
Authors declared no conflict of interest.
Acknowledgments
We are grateful to all the scientific consultants of this paper.
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