جستجوی مقالات مرتبط با کلیدواژه « تصاویر ماهواره&rlm » در نشریات گروه « جغرافیا »

Over the past two decades, the expansion of Shahrebeez to the surrounding areas has caused the destruction of resources and environmental problems, including the disruption of the ecological balance, the increase in service costs, the construction of unsuitable land, the aggravation of air pollution, and the lack of attention to existing worn-out structures and progressing trends. Previously, environmental quality has been reduced. The purpose of this study was to analyze the changes in urban land use of Tabriz with satellite images to determine the nature and intensity of these changes and in which directions and in which cases they are more so that a solution to these problems can be considered. In this research, land use changes in Tabriz city in three periods (2000, 2005, 2010, 2015, 2020) were investigated using multi-temporal data of Landsat satellite images in ENVI 5.8 software, and the results were analyzed in Arc GIS 10.2 software. And its results were produced in the form of a map. The obtained results show that the lands built during the period of 20 cases of Matala, from 30% in 2000 to 0.53 in 2020, which has increased by 23.0% in this 2020 year. Undeveloped land has also reached 0.42 in 2020 from 62.00 in 2000, which has gone through a significant decrease and changes in the last 20 years and has decreased by 0.19. Vegetation uses have decreased from 11.0% during the studied 20-year period to 4% in 2020.

Studying land use changes in the past and predicting these changes for the future is one of the important principles of planning for urban development, management of various hazards, optimal use of natural resources and curbing unprincipled changes in the future. Monitoring and optimal management of natural resources requires timely and correct information. In this regard, land use maps / land cover is one of the most important sources of information in various managements. One of the efficient methods for predicting land cover changes and land use is the Markov chain model. In this study, changes in land cover over the past years and the possibility of predicting it in the future using the Markov chain model in the Zard River basin have been investigated. To achieve this goal, the required satellite images were first prepared using ETM + (2000) ETM +, (2006); ETM + (2012) and OLI-TIRS (2018) sensors; maps were prepared after making corrections on satellite images, and evaluating the accuracy of classifications using kappa coefficient. Then the land use map for 2025 and 2050 is predicted. The results show that if the speed of land use change is the same as in previous years. In 2025, the use of built-up areas will increase to 1089.54 hectares, the use of green space and gardens will decrease to 4/4/2012, the use of wasteland to 85279.59 hectares will be reduce, arable land use will be increased to 1154/52 hectares and surface water use will be increased to 666/54. . In 2050, the use of built-up areas will increase to 1671/98 hectares, the use of green space and gardens will decrease to 192.62 hectares, the use of barren land will decrease to 8438.69 hectares, the use of arable land will increase to 1243.73 hectares. Surface water use will increase to 895.59.