كليدواژه :
سكونتگاه هاي انساني , آمايش , ژئومورفولوژي , پهنه بندي , مدل فازي , خراسان رضوي
چكيده لاتين :
Introduction Generally, the study of the creation of new settlements reflects the situation that most settlements suffer from the heterogeneous conditions of their physical development, which are based on natural factors, including geomorphologic For example, most slopes do not have good strength and connectivity, and the range of materials is affected by dynamic activities, weathering processes, gravity and slope slopes, and moving downwards, and since most cities and towns are located at the foot of the mountains, The effects of these processes are seriously damaged (Nadersefat , 2001: 62). It can also be said that the existence of an inappropriate and unbalanced natural spatial structure of settlements is one of the major issues in creating new settlements, which is influenced by natural factors such as mountains, foothills and plains, which determine the structure of settlements A new relationship between the factors affecting the structure of settlements and the geomorphologic factors of the area should be based on a logical relationship so that planning in this direction is oriented to a positive path (Esfandiari,2014: 54). But the main problem is that there is no relationship between settlement structure and geomorphologic factors in creating settlements in some areas and should use geomorphologic potential of the area to construct settlements to create new settlements. The aim of this research is to investigate the role of geomorphologic factors in the development of residential areas and to study the limitations and capabilities of geomorphologic units for planning and development of future settlements in the study area.
Methodology The present research is based on the type of attitude and purpose of the applied research and its method is descriptive-analytic. Data and information are collected in a documentary (library, statistical and visual) format. In this research geological maps of 1: 100000, 1: 250000 Geological Survey of Iran related to the region, maps 1: 50000 and 1250000 geographic organizations of the armed forces, as well as 1: 250000 mapping agencies, tectonic maps and faults Taken from the Geological Survey of the country, ETM satellite imagery, IRS and Google Earth imagery, as well as DEMs from topographic maps of the survey organization. Also, the software Arc GIS10.2, ENVI, Google Earth, Freehannd10, Excel, in general, aims to provide maps, image processing and analysis of existing climate and hydrological statistics ... and finally, the classification of information and their presentation has been used. The data have been analyzed using quantitative methods including mathematical models and spatial analysis. Satellite imagery was introduced into Envi environments to determine the range and trend of its expansion during different periods, and after classifying the images, the range was determined in different years and was reviewed and corrected by ground information.
Results and Discussion The parameters and factors considered for determining the areas susceptible to the development and deployment of human settlements in the fuzzy model were utilized using the gamma 0.9 operator as the best fitting factor and the final map was prepared. The map uses natural fractures to categorize very inappropriate (0- 0.184), inappropriate (0.184- 0.332), moderate (0.332- 0.498), appropriate (0.498- 0.625) and very suitable (0.625-0.916) classifications. Table 3 shows the area of zones suitable for the creation and development of human settlements in terms of the percentage of each of the zones, which is the basis for the highly inappropriate class of the largest area of the study area. This class accounts for about 52.34% of the area. The middle class accounts for about 16.40% of the area and is the second largest stratum in the study area. The inappropriate floor covers about 8.62% of the area. Appropriate and very suitable classes with 4700.29 and 2146.85 square kilometers were respectively 15.53% and 7.09% of the area of the study area respectively.
Conclusion The study of the final zoning map using the fuzzy logic model and its classes indicates that the geomorphologic conditions are unfavorable for much of the area for construction activities and the creation of new settlements. Approximately 61% of the area of the study area with an area of 18449.27 square kilometers is located in very inappropriate and inappropriate classes, which means that the geomorphologic conditions are unfavorable in this part of the study area to create and develop human habitats. About 16.4% of the study area, which has an area of about 4963.27 square kilometers, has moderate conditions for the development and creation of new human settlements. Also, about 23% of the area of the studied area with an area of about 6847.14 square kilometers is located in very suitable and suitable classes that indicate favorable and favorable geomorphological conditions of the area for construction activities and construction of residential areas is. Considering the natural and human geography of the region, this area is able to meet the needs of the region for the construction of cities and villages. According to the zoning map of the study area, the assessment of the factors affecting the formation and trend of the classes, in accordance with the geomorphological conditions, plays an important role in helping or undesirable areas for the construction of human settlements.
