Subaqueous dredging is a management activity undertaken globally to improve navigation, remove contaminants, mitigate flood risk and/or generate aggregate. Water Injection Dredging (WID) hydrodynamic technique involving the turbation and downstream displacement of fine sediments using vessel-mounted water jets. Despite being widely applied internationally, environmental ecological effects WID a...

A three-dimensional moment analysis defines both particle mobility and the average orientation angle of moving bedload particles in meander bends. Accordingly, under identical bed shear stress and near-bed streamline orientation angle on a side slope, bedload particles of different sizes move in different directions. This sorting mechanism has been verified in the sharp meander bends of Fall Ri...

The impact of dams and reservoirs on the aquatic ecosystem rivers is a very important topic for water resource management. These hydrotechnical facilities change natural hydromorphological regime rivers. This paper analyzed hydrodynamic characteristics an undeveloped riverbed section downstream Colibița reservoir, from Bistrita Ardeleana River hydrographic basin. After processing data obtained ...

River science and management often require a design or reference discharge. The common (and sometimes unavoidable) use of such discharges may, however, obscure the fact that the magnitude and frequency of critical flows can differ due to various hydrological, geomorphological, and ecological criteria. Threshold stages and discharges were identified for six lower Brazos River, Texas gaging stati...

Influence of forest conditions on the taxation characteristics and vital state Quercus robur L. was analyzed. The plants were planted artificial plantations laid in a tunnel beam city Dnipro 1961. experimental plots located thalweg (mesohygrophilic – L3) slope northern exposure (mesoxerophilic L1). 301 specimen Q. trees grow (SG1), 357 found. oak three morphological races beam: r. pectinata Sch...

relations between the third world countries in different parts of asia and africa during the 19th and 20th centuries, to a great extent, were influenced by the presence and policies of colonial powers. thus, for a better understanding of roots of disputes and issues existing between these countries concerning frontiers, disputed islands, political and prejudicial tensions, we need to study past...

The 2D numerical simulation of river flow requires a large amount of topographic data to build an accurate Digital Terrain Model which must cover the main river channel and the area likely to be flooded. DTMs for large floodplains are often generated by LiDAR flights. However, it is often impossible to obtain LiDAR data of permanently inundated river beds. These areas are often surveyed and dis...