%0 Journal Article
%T The effect of geomorphology on the formation and quality of aggregates in Pataq and Qalehshahin catchments
%A Sh. Bahrami
%A M. A. Zangeneh Asadi
%A K. Bahrami
%A R. Hosseini
%J Geography and Environmental Planning
%D 2013
%I 
%X Extended 1- IntroductionAmong construction materials, aggregates have extensive applications in the production of concrete, mortar, and in the construction of roads, railroads, airports, bridges and dams. Due to weathering, bedrocks are converted to small fragments and then weathered particles would be transported by erosive parameters such as water, wind, glacier and gravity and finally transported materials will be deposited in some geomorphological landforms. Some geomorphological landforms like river beds, river Terraces, alluvial fans, sand dunes, glacial outwash plains and taluses have large amounts of weathered rocks and sediments that are appropriate for aggregate exploitation. Pataq and Qalehshahin catchments as study area are the upstream subcatchments of Alvand basin in Kermanshah province, and are parts f Folded Zagros structural zone. The aim of this research is to define landforms that are appropriate for aggregate exploitation and to determine the effect of geomorphological processes in the formation and quality of aggregates.2- Methodology To achieve the purpose of this study, at first, Geologic map of the study area at a scale of 1:250000 and the topographic maps at a scale of 1:50000 were digitized in ILWIS (Integrated Land and Water Information System) software and used to derive lithology and DEM of study area. Landforms were recognized by Quickbird satellite images and precise field works also have been carried out for the identification of landforms and processes. The granulometry test has been done for 4 samples of fans. Two samples of sediment on old fans and two samples on new fans were collected and subsequently the cumulative granulometric curves were plotted. Among geomorphological landforms, alluvial fans and taluses were recognized as appropriate landforms for aggregate exploitation. To examine the quality of study area aggregates, 18 samples of aggregates on alluvial fans and taluses were obtained and then Impact Value tests were carried out based on sieve No. 8. 3- DiscussionAlluvial fans and taluses are of the most significant landforms that have a lot of weathered and crushed materials that can be used as aggregates. A total of 97 alluvial fans have been formed in Qalehshahin catchment. The presence of large boulders with karstic pitting, weathered and varnished clasts and some soil cover on most fans demonstrate that approximately all mentioned fans are inactive formed in more humid periods of Quaternary. Moreover, the results of sediment granulometry show that young fans have finer sediment and old fans have coarser se
%K Pataq
%K aggregate
%K geomorphology
%K process
%K talus
%K alluvial fan
%U http://uijs.ui.ac.ir/gep/browse.php?a_id=868&sid=1&slc_lang=en