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

The desert areas of the playas are important due to the diversity of geomorphological landforms and the great potential for geo-tourism development. These areas can be provided using statistical and quantitative models to determine the areas with a higher geomorphological diversity value to land planners for the sustainable development. This research was conducted to evaluate the geomorphodiversity in Mesileh playas in Namak Lake and Hoz-e- Sultan region. The geomorphological landforms in this area were extracted using satellite images and field studies, Fragstats software and the eight quantitative indicators of the landscape metrics include Patch Richness Density, Relative Patch Richness, Simpsons Evenness Index, Index Shannon Evenness, Shannons Diversity Index, Simpson's Diversity Index, Modified Simpson's Diversity Index, Modified Sahanon Evenness Index were exerted to evaluate the richness of geomorphological units in Masileh playas. The results indicate that the geomorphological units of alluvial fans, salt flats, salt mud flats and dunes, respectively, have the highest value among the landscape metrics. In addition, from the point of view of the landscape metrics, the northwest regions of Kashan and Abuzeydabad have the most incredible variety of geomorphology. This research showed that geomorphological units could be used as a suitable indicator in evaluating the diversity of the landscape, especially in flat areas with morphometric and geological diversity.

Geodiversity is recognized as an important aspect of nature conservation in itself and is a material consideration in planning decisions in developed countries. In recent decades, many researchers have turned their attention to the definition of geodiversity and its relationship to biodiversity, natural environment protection, ecosystem services, and geotourism. In the emerging science of geodiversity, geomorphodiversity evaluates the shape of the surface features of a place or region. Different geomorphological landforms may occur in a geographical environment that creates a variety of landforms called geomorphodiversity. The purpose of this study is to provide an indicator of geomorphodiversity as an attempt to replace landforms with DEM-derived morphometric parameters and finally to prepare geomorphodiversity maps of the study area; Geomorphodiversity Index (GmI). DEM As the only input data, this approach makes it possible to achieve topographic variables with different horizontal resolution and vertical accuracy and to test more than one topographic data for an area. Thus, the GmI method uses geomorphological data only for result validation and not as input parameters to avoid the limitations mentioned in geomorphological thematic mapping. The Mishu Mountains contain a variety of geomorphological phenomena.
this mountain are less popular today among different regions due to habitat destruction and species extinction. In the past, it was one of the most valuable regions in the country in the regional network and was considered an irreplaceable region. Due to the recent droughts and the lack of codified management plans and also due to the lack of attention in control and supervision of miners and also one of the main conflicts in the Mishu Mountains, we can point to the imbalance between livestock and rangeland. This area has witnessed many destructions over the past years. Mainly the geodiversity of the Misho Mountain region has been involved in its development, providing both opportunities and constraints that need to be managed and understood. With the advent of new approaches in geodiversity, geographical spaces such as Mount Misho can be used effectively.

The study area is located in northwestern Iran. Its highest peak is Ali Alamdar with a height of 3155 meters. In terms of morphological and geological characteristics, it is divided into two parts, Eastern Misho and Western Mishu. In this study, the GMI Quantitative Geomorphodiversity Index presented by Melelli et al. (2017) is used to evaluate. Analysis of indicators and using advanced software such as GIS software, Land Face software and SAGA increases the validity of research findings and results. This analysis includes five factors taken from Melelli et al. The sum of these five parameters shows the geomorphodiversity of the region (Equation 1).
1 : GmI = Geov + Ddv + Rgv + Spv + Lcv
GmI Index of geomorphodiversity:1. Geov is a classified raster map of geological diversity.
2. DdV is a categorized raster map factor for drainage density variability.
3. Rgv Classified raster map is a factor of roughness variation.
4. Spv is a categorized raster map.
5. LcV Classified Raster Map is a factor in Landform classification diversity.
It is necessary to mention that except for the geological map factor, in other factors, the maps went through two stages of processing. The first step is to extract the raw data. The second stage is normalization using natural ruptures. This algorithm reduces the variance within the groups and maximizes the variance between them. Normalization uses the ArcGIS 10.7 reclassification tool to create five classes for each factor. V1 is the lowest while V5 is the highest diversity class (V). This formula is classified into five categories (very low) to (very high). The focus of the research method of this model is the spatial analysis of indicators obtained from Dem 12.5 meters. To evaluate the variability of each parameter, a focal function (neighborhood statistics function) is applied as a result of the variability.

The results of this study showed that the range of geomorphodiversity of the study area decreases from the peaks to the plain and areas with low geomorphodiversity value are located in the plain. The lowest diversity (V1) consists of Quaternary deposits and the highest diversity (V4 and V5) is composed of carbonate formations, intrusive masses, and volcanic formations because they are the rarest type of rocks all over the earth's surface, located mainly in the eastern Mishu. The high values of diversity in the geological factor are related to the erosion-resistant geological substrate (such as volcanic compositions and intrusive masses) and the lowest values of diversity are related to the Quaternary deposits along valleys and plains. The geological factor, waterway network, and landform classification show the highest percentage of area in the upper classes of diversity compared to other parameters of the geomorphodiversity equation (Equation 1). In geological factor due to the large area of carbonate and alluvial assemblies. In the other two factors,

The results of the present study showed that the range of geomorphodiversity of the study area decreases from the peaks to the plain and areas with low geomorphodiversity value are located in the plain. Also, the lowest diversity (V1) consists of Quaternary deposits and the highest diversity (V4 and V5) consists of carbonate formations, intrusive masses and volcanic compounds because they are the rarest type of rocks all over the earth, which are mainly in The eastern parts of Misho are located. The high values of diversity in the geological factor are related to the erosion-resistant geological substrate and the lowest values of diversity are related to the Quaternary deposits along the valleys and plains.The geological factor, waterway network and landform classification show the highest percentage of area in the upper classes of diversity compared to other parameters of the geomorphodiversity equation (Equation 1).

The need for management of the coastal of the Oman Sea and the Makran as a vast stretch of the Iranian territory with great development potentials in various areas. One of the most important areas for progress in this region is the enhancement of the tourism industry. One of the effective and potential capabilities that can be utilized for enhancing tourism is the geodiversity and the geomorphodiversity in the region. These diversities have been emphasized as the main bases for tourism in the region and steps have been taken to analyze and evaluate them. The study area, extends from the shorelines of Jask Bay to those of the Gwadar Bay and its land area stretches for approximately 120 kilometers from the coastline to the conical fold in the Makran zone. This research used quantitative, statistical and remote sensing methods to study the roles of active geological and tectonic factors, climate and proximity to the sea as the main parameters in the formation and expansion of geomorphological relief. It also evaluated the capability of each one, based on priorities, in the development of tourism in the area covered by the main drainage basins. The results show that geomorphodiversity with PRD of 0.0009, SHDI of 3.3529, SHEI of 0.9329, SIDI of 0.9578, and SIEI of 0.9774, is more importance and valuable than the geodiversity. Therefore, it is essential that the responsible authorities build the infrastructures required for the development of the Geomorpho-tourism industry in order to develop the coastal in southeastern Iran.

Geomorphodiversity Investigation of Damavand volcano and its surroundings based on the GmI Index Extended Abstract Introduction Geomorphodiversity defined as “the critical and specific assessment of the geomorphological features of a territory, by comparing them in an extrinsic and in intrinsic way, taking into account the scale of investigation, the purpose of the research and the level of scientific quality”. Area with high geomorphodiversity can provide a wide range of services, including provisioning (food products), regulating (erosion regulation) and supporting (land and water as a platform for human activities). The geomorphodiversity of Damavand volcano and its surroundings require special attention to identification, management and conservation, prevent degradation and construction in vulnerable areas. Promoted recognition of Geomorphodiversity can provide useful information about the management of geomorphological heritage and how to better protect them against destructive human activities and environmental hazards. Also, the preparation of Geomorphodiversity maps, the identification of areas with high potential for regional development and geotourism, provide comprehensive information for designers, planners and responsible organizations in these areas and create solutions for the environmental complexities of the study area; therefore The main objective of the present study is identification and quantitative assessment of geomorphodiversity and the preparation of geomorphodiversity maps of the study area. Methodology Damavand volcano was inscribed as Iran's first natural property in the national heritage list at the Cultural Heritage, Handicrafts and Tourism Organization on July 3, 2008. The data of this research include geology, drainage network, slope, roughness and landforms, which are related to the evolution of the physical landscape of the study area. Landsat satellite imagery, thematic maps, DEM10 meter, etc. are used to achieve the goals. In this study, geomorphodiversity quantitative index has been used for analyzing the results and the results has been validated by comparing with geomorphology map and field control. Geomorphodiversity index (GMI) is presented by Melelli et al. (2017). The value of geomorphodiversity is calculated from the sum of five factors including geological diversity, drainage network density diversity, roughness diversity, slope position index diversity, landform category diversity. All of them are grids of different terrain parameters. Results and discussion In the geomorphodiversity of the study area, the V1 class is 1.05%, V2, 25.84%, V3, 37.17%, V4, 22.14% and V5, 4.84% of the total area of the region. Distribution of geomorphodiversity of the study area is mainly related to the topography condition; the lowest value of the geomorphodiversity (V1) is related to the Damavand volcano cone, especially the lava plain in the northwest. The highest value of geomorphodiversity (V5) extends along the valley of Haraz, where different types of geomorphological processes are meeting, such as fluvial, glacial, hillslope, igneous, tectonic and etc. In other words, increasing the value of geomorphodiversity along the Haraz valley can be interpreted as a result of the frequency of the geomorphological processes presence. Validation results also showed that there is a good correlation between the geomorphodiversity index value, the number of different types of landforms and the average number of landforms. The most extensive area with the lowest value of geomorphodiversity is located in the northwest of Damavand and in the Sardagh plain. Along the Haraz valley, which has the highest geomorphodiversity, there are different types of landforms, including river terraces, lake terraces, landslide, talus, basaltic prisms, deep valleys, travertine landforms, high channel density and so on. In general, in the study area, the high value of geomorphodiversity is mainly located at the meeting place of Damavand volcanic lava with rivers. Conclusion The geomorphodiversity of Damavand volcano and its surroundings are one of the most important fortunes in the region. Geomorphological landforms have been maximized in these areas and offer a unique geomorphological complex. The geomorphological landforms density in these areas are maximized and provide a unique geomorphological collection. Areas with high geomorphodiversity are rich and unique collection of different types of landforms and geomorphological processes that require special attention for geotourism, scientific-educational, national and world heritage, geopark, and so on. In addition, the determination of areas with high geomorphodiversity is another way to promoting geomorphological heritage; In other words, geomorphodiversity are the backbone for identifying and assessing geomorphological heritage for various purposes of geotourism, national and world heritage, geopark, conservation of geomorphological heritage. To ensure that the values of these areas can be preserved for current and future generations, managing and conserving them is very important. Nevertheless, studies of geomorphodiversity are at an early stage and need more help and reflection by geomorphologists in collaboration with other researchers in the Earth sciences. Keywords; Geomorphodiversity, Landform, Geomorphological heritage, Quantitative assessment, Damavand volcano