Mohammad Gholampoor; Mohammad Khosroshahi; Jalal Barkhordari
Volume 15, Issue 4 , January 2009, , Pages 485-492
Abstract
Desert in terms of geomorphologic aspects has been defined and classified based on the morphogenesis, litological structures and combination of these two criteria. In this study Hormozgan desert has been classified in terms of geomorphologic features using morphometric method in order to separate the ...
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Desert in terms of geomorphologic aspects has been defined and classified based on the morphogenesis, litological structures and combination of these two criteria. In this study Hormozgan desert has been classified in terms of geomorphologic features using morphometric method in order to separate the desert area from non desert area. The objective of this work was to determine the extent of the natural desert of Hormozgam province using maps of geology, topography and combination of data collected from geomorphologic features of desert in the GIS environment. The geomorphologic features such as pediment plains, flooding beds in the route of water way network, drifted sand, nebkas, playa, saline lands and badlands were diagnosed. In order to be able to map all items in maps showing Hormozgan desert areas, the Satellite images from ETM was used to fined the new land features and also correct the boundary of desert lands. Finally it was found that the geomorphologic desert of Hormozgan covers % 17/2 of the whole area of the province.
Saeid Choopani; Mohammad khosroshahi; Mohammad Gholampoor; khosro Mirakhorlo
Volume 13, Issue 1 , February 2006, , Pages 17-26
Abstract
The country of Iran is situated in an arid and semi-arid zone, with an average precipitation of about 250 mm per year. Hormozgan province in southern Iran, is one of the most arid parts of Iran with an average annual rainfall of only 170mm. The study area is located ...
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The country of Iran is situated in an arid and semi-arid zone, with an average precipitation of about 250 mm per year. Hormozgan province in southern Iran, is one of the most arid parts of Iran with an average annual rainfall of only 170mm. The study area is located in the Zagros and Makran geological zones.. In the study area the oldest formations are of Palaeozoic age. Another characteristic of the Zagros zone are diapirs. Diapirs rise up from the deepest part of sedimentary rocks, and after cutting through the upper layers, they may appear at the surface, which seriously affect groundwater quality and land use. Desertification; in Iran has occurred from Neosene and Quaternary. Geological formation have important effect on salinisation and desertification. Thus, the geographical investigation of desert area is very important. This investigation is based on GIS method Applications, geological map (1:250000) and supported by, fieldwork. At the first, prepared and digitizing of geological maps by Ilwis program and was carefully checked and corrected where possible. The next step prepared evaporation formation and Quaternary maps and its overlying. Prepared cross map of Quaternary and Hydrographic network and determination of primary and secondary deserts area. The final step was prepared a cross map of primary and secondary desert area map and checked by fieldwork. To comparison between units of desert area map, can be result, more than 78 percent of study area is situated in the deserts area.