جستجوی مقالات مرتبط با کلیدواژه « geomorphic » در نشریات گروه « جغرافیا »

Land subsidence is one of the most important geomorphic hazards that has a slow motion but destructive effects in the long run. For the spatial analysis of the amount of displacement, the data on changes of the ground surface from Sentinel A1 for a period of 3 years (2017-2020) through the radar interferometric method and SNAP software were used. Field observations were also made to evaluate the research results. The results showed that the rate of land subsidence has increased from 2017 to 2020, from 2.6 cm in 2017 to 7.8 cm in 2020. Moreover, the groundwater hydrograph in the central plain of Ghaen has significantly decreased, so that the rate of water level drop in the plain level has been about 1.30 meters during 5 years (from 2014 to March 2020), i.e, about 26 cm per year. In addition, the analysis of spatial autocorrelation and Moran index (0.984) confirmed the clustering of subsidence event under the influence of water level changes in the study area. The correlation results also showed that there was a small correlation between the factor “changes in water level” and “land subsidence rate” (p = -0.138), which is an indirect relationship, i.e., the higher the groundwater abstraction (or the lower the water level), the higher the amount of subsidence. But due to the level of significance (sig = 0.585) this relationship is not significant.

Talk residential location is currently an important issue affecting the discussion of urban land use is And since today's urban centers are very complex construction equipment and buildings are largely taken Cities and urban geomorphology of the area have been substantial damages when it becomes apparent that a lot of people are out of tolerance. So before creating a secure and robust construction, the location of cities and select a suitable site for the development of studies and research carried out detailed Some geomorphologic phenomena just as destructive and inhibiting factors are not considered in the establishment and development of cities, But if urban planners have full knowledge of all aspects of the application of these phenomena have geomorphologic It will become a positive factor in the establishment and development of urban infrastructure planning in addition to the effects of topography is not Because the topography of the rugged topography and orientation in urban issues such as the construction or relocation of the urban population is undeniably In this research or analysis method and field test comparison between the two samples (T-Test) Geomorphic phenomena and location by means of the relevant entities in the licensing And since the two examples.

KARKAS Mountain is the highest peak of the Kashan Natanz regains.On the one hand due to the diversity of geomorphologic. For Example: diversity of heights, tilt of foothills, valleys, types of faults, and time-rock units, types of units, glaciers, and sediment On the other hand, due to geomorphic processes such as tectonics, dry and hot to cold temperate climate, luxuriant vegetation and some areas without vegetation, landslides, rock debris It can be described as a place for research in the earth sciences .The paper studies of the geomorphology of KARKAS Mountain Try to interpret variety of forms and processes by using GIS... Due to the introduction of the gradient of the mountain, evidence of glaciers is currently slopes of the activity of the earth (the dynamics), We conclude that, especially on the northern slopes of the mountains above 1700 meters, is very sensitive to environmental changes morph tectonic exercise and it is happening very rapidly.

Fars province has the potential of geo-tourism manipulation due to having a variety of geomorphic sites with diapirism function. The performance of this diapirism has been exposed as plugs and salt-domes form in this province. 56 Salt plugs reported within Fars region and the Zagros geological belt-zone are as great evidence. Most of these phenomena have geological attraction, which makes them wonderful places as geo-sites. In addition, salt domes can be considered as geomorphic sites due to having scientific, cultural, historical, aesthetical and economical value. Despite of most investigations, which have been done on descriptive method, this research integrates quantitative results with geo-tourism agenda, based on existing data on geologic, geomorphic, topographic and demographic zones in the province by using Geographical Information System (GIS) as the primary analysis field. Different evaluated variables, in the optimal management of diapir geo-tourism, have been sorted as following based on the existing criteria and research calculations: Roads (about 100%), the equipment of county centers (98%), domes’ height (97%), distance between the domes and villages/oasis (82%).The result of this research will show the function of diapir geo-tourism on the acceleration of sustainable development process in the area as well as the economic progress of county centers and other oasis near these domes, as the main bases of geo-sites.

According to the complex process of main bed river movement, erosion in the Harirudborder River and crucial importance of its geomorphic evolution in hydropolitics issues, identifying the geomorphic evolution of this river is regarded nesseccary. Having predicted the trend of geomorphic evolution of the stream channels, one can propose better solutions to the related problems. Quantifying the meanderings of the river from the past and present timed maps and pictures, the amount of the bed river movement can be recognized in both longitude and latitude. The quantification was carried out by Arc GIS package, SPSS and field work. The effect of natural factors such as tectonics, slope amount, the formation of the river and river discharge were also measured so that we can determine the effect of these parameters on the meandering movement. The present study aims at evaluating the morphologic changes of Harirudasa border river bed and investigating the factors affecting these changes. Ultimately, it turned out that a series of environmental and Anteropzhen movements have taken place in the context of Harirud River mostly toward Iran

Subsidence phenomenon consists of dilapidation of land surface that happens for different reasons in large scale. Different items lead to this phenomenon such as dissolution, fuse of ice and accumulation of sediments, slow moving of earth, exudation of lava, human interferences like mining or out of control consumption of water sources. The main factor of subsidence phenomenon in most Iran's plains is discharge of aquifer that develops silently like cancer in the Plain of Mashhad, a super critical plain in northeast of Iran, which the metropolitan of Mashhad is located on it, is not an exception and slow but dangerous changes can be seen on it everyday. Certainly recognizing the different aspects of this event is useful for finding some. solution in order to control the human and financial disaster Method and phases of research: This research is experimental and the following steps are done in order to reach the goal: - gathering the information. Providing and entering the different layers of useful information for preparing the plan - Mapping Analysis The main goal of geomorphic study of this event is the valuation of the level of the plain.