Airborne Laser Scanning or LiDAR data are widely used nowadays in river valleys for topography and hydro-morphology. However, the large data sets of unprocessed 3D point clouds require some challenging treatment and end-users may prefer to deal with DTMs (Digital Terrain Models) derived from LiDAR surveys. Without any complementary data (such as field survey or photographs) detecting position a...

In many gravel-bedded rivers, floods that fill the channel banks create just enough shear stress to move the median-sized gravel particles on the bed surface (D50). Because this observation is common and is supported by theory, the coincidence of bankfull flow and the incipient motion of D50 has become a commonly used assumption. However, not all natural gravel channels actually conform to this...

Land subsidence is a worldwide problem that is typically caused by human activities, primarily the removal of groundwater. In Western Taiwan, groundwater has been pumped for industrial, residential, agricultural, and aquacultural uses for over 40 years. In this study, a multisensor monitoring system comprising GPS stations, leveling surveys, monitoring wells, and Persistent Scatterer Interferom...

Coarse-grained beaches are particularly prevalent in the UK, composed of accumulations of either gravel, or mixed sand and gravel sediments. Understanding and predicting their morphological behaviour in response to short-term and long-term forcing has been the subject of recent research. Despite the focus on sandy beaches, it is important to understand that the balance of processes that govern ...

—Endangered Interior Least Terns ( Sterna antillarum athalassos ) and threatened Piping Plovers ( Charadrius melodus ) nest in Nebraska at gravel mines where they are vulnerable to disturbance and nest loss. Conflicts occur when their nesting and protected status delay mining activities. The possibility of shifting nesting from active to inactive mining areas by using a deterrent (mylar flaggin...

In a recent issue of the Proceedings, Jennings & Smyth (1990) investigated a critical aspect of the Holocene coastal evolution of much of Britain; namely gravel (or shingle) sediment supply and beach morphodynamics through time. Their study area is the coastline of East Sussex, and it should be noted that it is only a component of the larger coastal unit (or 'master cell') between Selsey Bill a...

We use the Be concentration in alluvial sand and gravel to document hillslope exposure history and trace the reduction in grain size of river alluvium in the Clearwater River basin, western Washington State. Clearwater tributary basins Wilson Creek (WC, 6 km) and East Fork Miller Creek (EFMC, 12 km) were each sampled in headwater and downstream sites for Be in alluvial sand (0.25–0.50 mm) and g...

The coastal marine ecosystem near the Elwha River was altered by a massive sediment influx-over 10 million tonnes-during the staged three-year removal of two hydropower dams. We used time series of bathymetry, substrate grain size, remotely sensed turbidity, scuba dive surveys, and towed video observations collected before and during dam removal to assess responses of the nearshore subtidal com...

Abstract La Parrilla is a tungsten and tin mine located in western Spain. The tailings facility has total capacity for 3 Mm will be executed four different phases. main constraint the design construction of dam that it been constructed over an existing one from 1980s. activities involved removal substitution old southern portion facility, ground improvement with gravel columns area about 10,000...