â â â  parsian alluvial fan system is a part of asyab-kharabeh fluvial system that response it to quaternary climate changes is the main goal of this study. for this aim, climatic proxies and traces in alluvial fan structure were investigated base d o n four categories: aggradation and degradation phases, debris flows, size changes in deposited materials and formation of alluvial fan tufas. pri...

For channelized, flood-regulated rivers, morphological changes are avoided as much possible. Extraordinarily high flows in the past, however, have demonstrated that channelized rivers may also become morphologically active, especially when a discharge exceeds design discharge, such hundred-year floods. However, morphodynamic potentials and critical cases hardly been investigated, flood risk to ...

introduction alluvial fans are depositional landforms developed on a confined channel emerged from a drainage basin, i.e. between a mountain range and a plain. an alluvial fan is a fan- or cone-shaped deposit of sediments crossed and built up by streams. if a fan is built up by debris flows, it is properly called a debris cone or colluvial fan. these flows come from a single point source at the...

Sediment storage by instream wood in forested mountain streams mediates sediment movement from hillslopes through the channel network and can alter morphology at multiple spatial scales. Mixed bedrock-alluvial channels are prevalent stream networks, yet distribution geomorphic impact of large within these poorly understood. To estimate how a mixed relates to storage, we measured characterized w...

Alluvial-fan strata contain valuable proxy data for kinematic, climatic and sediment-flux phenomena associated with high-relief source regions. Proper application of this data is dependent upon acquisition of accurate high-resolution chronostratigraphic data, best achieved through magnetostratigraphy. Collection of magnetostratigraphic and other proxy data from composite alluvial-fan sections a...