Geomorphology
Mohammad Ali Zanganeh Asadi; Abolghasem Amirahmadi; ali akbar shayan yeganeh
Abstract
Geotourism, encourages tourism into geosite and conservation of geodiversity and an understanding of earth sciences. One way to effectively protection and conservation geodiversity is that valuable parts such as geoheritage (geological and geomorphological heritage) are protect and conserved. Most ...
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Geotourism, encourages tourism into geosite and conservation of geodiversity and an understanding of earth sciences. One way to effectively protection and conservation geodiversity is that valuable parts such as geoheritage (geological and geomorphological heritage) are protect and conserved. Most of human-scale geological materials are non-renewable. Geoparks are special territories with a development plan that their aim is protection of geological heritage (and other natural resources) while preserving the cultural identity of local communities. Iran has a wide range of geological and geomorphological phenomena that geotourism recently formed and located during the early stages of development. The paper attempts to analyze and evaluate based on geomorphosites and geosites in West of Khorasan Razavi, one of the common methods (method Brilha), could be offered the optimal mechanism for the protection and benefit of geodiversity (geoconservation).
Geomorphology
mehdi Saghafi; abolgasem amirahmadi; maryam rabiei
Abstract
Alluvial fans as one of the major geomorphological forms of water reservoir are very important, such that most of urban and rural centers of Iran, especially in central and eastern sections are located on alluvial fans. They are usually controlled by geomorphological forms of tectonic activity along ...
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Alluvial fans as one of the major geomorphological forms of water reservoir are very important, such that most of urban and rural centers of Iran, especially in central and eastern sections are located on alluvial fans. They are usually controlled by geomorphological forms of tectonic activity along with climate change. Alluvial fans are located in the southern half of the drainage basin of Birjand. Due to their proximity to the city and the residential areas, they are very important. BagheranMountains in the south part of Birjand are part of Sistan area. The most important rock units in the upper Cretaceous include ophiolitic mixture, flysh, congelomerate and the oldest unit is related to that era. In this study the geomorphology evidence of the area has been used to investigate the morphotectonic activity. In order to do this purpose, we used sime indices. Review of the samples of sediment aggradation and drainage network on alluvial fans show how climate and tectonic have influenced them. Field observations and sediments granolometry have been used for this purpose. The results of the analysis also show young tectonics and dynamic processes of external activities intensity performance in the region. Also granolometery analysis of the area as evidence of tectonic activity result in alluvial fans landforms transitional to the bajada plains indicated that climate change and wind erosion have higher intensity on landforms.
Abolghasem Amirahmadi; Nasim Maali Ahari; Tayebeh Ahmadi
Volume 17, Issue 46 , February 2014, , Pages 1-23
Abstract
Ardebil plain, an area of approximately 1097.23 km2 in geographic coordinates of 38˚ 5¢ to 38˚ 27¢ north latitude and 48˚ 9¢ to 48˚ 37¢ eastern longitude, is a valley plain. During recent years, groundwater has been stuck with eye drops. This article reviews the changes occurred ...
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Ardebil plain, an area of approximately 1097.23 km2 in geographic coordinates of 38˚ 5¢ to 38˚ 27¢ north latitude and 48˚ 9¢ to 48˚ 37¢ eastern longitude, is a valley plain. During recent years, groundwater has been stuck with eye drops. This article reviews the changes occurred in the volume of water aquifer and the rate of decline in groundwater in the plain out of the data from wells by using the software ArcGIS, piezometers maps and drop zone in the area under study. Graphical maps showed that the highest rate of water loss has occurred in the southeastern region. The zoning plan was provided, and it showed that 14% of the drop zone area was in the high plains, 29.73% in the high zone, and 26.6% in the intermediate zone, 17.38% in the low zone and 12/29% of the drop zone are low. The results indicate that the aquifer is in a critical condition in Ardebil. To explore the possible future subsidence, affecting layers included: precipitation, slope, hydrology, lithology, geomorphology, soil, vegetation and human factors extracted from maps and combining layers in GIS. map projections drop of water method were developed in the future using underground Co-Kriging point. The results showed that it is most likely that in the future Ardebil method subsidence would occur due to excessive removal of groundwater resources in the south east will and human activity in the west plains subsidence are the second risky factor.
