K. Nejad. Afzali; F. Bayatani; E. Moghimi
Abstract
Coastal region are influenced by land and sea. Geomorphologic coast features are related to sea level change, regional river regime, erosion processes, sedimentation, climate change, geological outcrops and weathering and tectonics. Tom bolo, lagoon and barrier are geomorphologic coast features that ...
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Coastal region are influenced by land and sea. Geomorphologic coast features are related to sea level change, regional river regime, erosion processes, sedimentation, climate change, geological outcrops and weathering and tectonics. Tom bolo, lagoon and barrier are geomorphologic coast features that can be seen in Bir coast of Iran. Therefore, recognizing the producing mechanism and their changes, leads supervisors to have better management, and do their best for civil and improving planning in coast area. In this research in addition to field studies and sampling, aerial photos 1/40000(1993), topographic maps 1/20000, high resolution images (ETM and IRS) 1998, 2005, 2008 were used. It is concluded that the area is tectonically active, sedimentation; erosion processes, river regime and sea level change are caused to the Tom bolo, Lagoon and Barrier in Bir coast. Surveying the forms, sediment shows an obvious computation between marine currents as constructive process of Tom bolo, lagoon and barrier, and rivers as destructive process in Bir coast.
E. Moghimi; M. Badri Far; M. Zarei Nejad
Abstract
Morphodynamic characteristics of Damavand volcanic cone have been affected by two factors including internal and external morphodynamics. Major goal of this research is based on external morphodynamics. The morphodynamical landforms of this area are divided in two main groups, the first one is climatic ...
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Morphodynamic characteristics of Damavand volcanic cone have been affected by two factors including internal and external morphodynamics. Major goal of this research is based on external morphodynamics. The morphodynamical landforms of this area are divided in two main groups, the first one is climatic processes and the second one is anthropogenic processes. Climatic processes, including glacial erosion, pre-glacial erosion and alluvial erosion, have changed morphology of slopes and spatial landforms. For the special geographic condition of Damavand volcanic cone, few data is available. Therefore by using satellite images ETM+, ASTER, SPOT, several new data layer have been prepared based on base maps and field checking in GIS environment.
A. Mansourian; M. Zareinejad; E. Moghimi; S. Omidian
Abstract
Damavand volcano is one of the most important geological features in Iran. Although a variety of studies are available about this volcano, there are different problems associated with existing data from Damavand including: they are not stored in a consistent and organized way, they are not directly ...
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Damavand volcano is one of the most important geological features in Iran. Although a variety of studies are available about this volcano, there are different problems associated with existing data from Damavand including: they are not stored in a consistent and organized way, they are not directly applicable in users' information systems (such as GIS), and they are not easily accessible and sometimes not accessible to users. In addition, clear and accurate studies about geomorphological-environmental specifications of Damavand are not still available. Considering these facts, this paper aims to describe design and implementation of Damavand geomorphological-environmental database and then disseminating it using WebGIS. In this research project, firstly, required spatial and attribute data were identified. Then, using available maps, satellite imageries, aerial imageries, and field works, required data were produced, completed and complemented. After that, the proposed database was designed and implemented and finally the mentioned data were stored in the database. By conducting these stages, the Damavand geomorphological-environmental database was established. At the next stage, an interactive WebGIS was designed and implemented in Geological Survey of Iran (GSI). At the last stage, the database was linked to the WebGIS and disseminated via that. At the time of writing this paper, the Damavand WebGIS and hence the geomorphological-environmental database is accessible via GSI intranet. The WebGIS can also be connected to internet in order to make the database accessible for public. Establishing such database for other geological-related datasets and its dissemination using WebGIS can significantly resolve current problems associated with these datasets from storage, accessibility and applicability perspectives.
