Abstract. A potential control of downstream channel width variations on the structure and planform pool–riffle sequence local bed topography is a key to dynamics gravel rivers. How established sequences respond time-varying changes in at specific locations, however, largely unexplored challenging address with field-based study. Here, we report results flume experiment aimed building understandi...

The Liard Basin, in northwestern Canada, contains one of Canada’s largest natural gas reserves. There are concerns about degradation Dunvegan Formation groundwater quality, which is the basin's main shallow freshwater aquifer, as a consequence oil and development. Previous lithostratigraphic studies interpreted conglomeratic alluvial fans. In this study, newly collected cores surface resistivit...

Proper estimation of sediment movement is very critical for the management alluvial rivers. Computing transport with single particle size possible. However, particles on river bed and in have a distribution. It important to estimate material change, such as armoring, case scour. In this study, applicability sorting method, which available HEC-RAS, was analyzed. Bed methods divide into two or th...

The Oligocene–Miocene deposits of the Asmari Formation are located in SW of the Zagros Mountains of Iran. The lower part of the Asmari Formation consists of an evaporite bed that is termed Basal Anhydrite. Seven sections from four different anticlines were selected and sampled for petrographic and mineralogical analyses .The petrographical examinations were carried out using an optical polarize...

[1] Bed load sediment particles supplied to channels by hillslopes are reduced in size by abrasion during downstream transport. The branching structure of the channel network creates a distribution of downstream travel distances to a given reach of river and thus may strongly influence the grain size distribution of the long-term bed load flux through that reach. Here we investigate this hypoth...

[1] Sediment flux from rivers to oceans is the fundamental driver of fluvio-deltaic morphodynamics and continental margin sedimentation, yet sediment transport across the river-to-marine boundary is poorly understood. Coastal rivers typically are affected by backwater, a zone of spatially decelerating flow that is transitional between normal flow upstream and the offshore river plume. Flow dece...