نوع مقاله : مقاله علمی پژوهشی
1 دانش آموخته دکتری ژئومورفولوژی دانشگاه تهران
2 دانشگاه گلستان
3 دانشیار بخش زمین شناسی دانشگاه شهید باهنر کرمان
عنوان مقاله [English]
Review of Drainage Network Morphomerty on Bidkhan Volcano (Kerman Province) Abstract: Volcanic cones are among the simplest volcanic landforms. They are built by ejecta from a volcanic vent, piling up around the vent in the shape of a cone with a central crater. Volcanic cones are of different types, depending upon the nature and size of the fragments ejected during the eruption Bidkhan Mountain is located in the southeastern part of the central Iranian volcanic belt .Profound valleys and irregular drainage pattern on volcano side shows long time erosion and development of drainage network on it. This study aimed to identify geomorphometric characteristics of drainage basins, drainage pattern,as well as studying longitude river profile and morphologic evidence in order to analysis tectonic behavior on them . To obtain necessary data for this research topographic maps of 1:25000, Aerial photos:1:55000 and 1:20000 , geologic maps 1:100000 of Chaharghonbad and Bardsir and computer software were used as research equipments. To carry out the goal, drainage basin delimitate in GIS and WMS software and then morphometric statistics done in Excel. Based on the results of morphometric factors and comparing drainage pattern, in inner basin of caldera dendroid pattern developed and longitude profile shows equilibrium. In lateral basins parallel pattern has been developed. Southern basins shows high elevation (3195.4Meter) and longitude profiles are convex that shows youthfulness on valleys. It seems that this side of volcano affected by fault line showed on geologic map as an inferred fault . Fracture on longitude profiles, deep excavation and in some occasion barred valleys and pressure ridge are evidence of this purporst. Key Words: Bidkhan Volcano, Morphomerty, Drainage Pattern, Geomorphology
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