Gullies are sources and reservoirs of sediments perform as efficient transfers runoff sediments. In recent years, several techniques technologies emerged to facilitate monitoring gully dynamics at unprecedented spatial temporal resolutions. Here we present a detailed study valley-bottom in Mediterranean rangeland with savannah-like vegetation cover that was partially restored 2017. Restoration ...

17 Globally, populations of diadromous anguilliform morphotype fish, such as eel and 18 lamprey, have experienced substantial declines, partly as a result of habitat 19 fragmentation caused by river infrastructure. In the UK, a new configuration of 20 hydraulically unobtrusive bristle pass (side-mounted and vertically oriented) has been 21 developed to help upstream moving European eel (Anguill...

rock has been advantageously employed in hydraulic structures such as rockfill dams, gabion weirs and drain works. one rockfill dam applications can be flood control in wa-tershed management. the objectives of building rockfill detention dams are flow storage for a specific period and lowering of the outflow hydrograph. as this type of dam consists of coarse particles, seepage flow will deviate...

The impacts of large dams on the hydrology and ecology of river systems are well understood, yet the impacts of low-head structures are poorly known. While impacts of small weirs on upstream-migrating fish have long been mitigated by fish ladders, it is assumed that downstream migration of surface-oriented fishes is unaffected under natural flow regimes. To test this, the effects of low-head we...

bendway weirs are an important tool in multi-purpose erosion control and are implemented to control erosion, restore streams, and improve habitat. these structures create a hydraulic effect that reduces erosion on the outer bank of a bend by reducing flow velocities near the outer bank and reduce the concentration of currents on the outer bank creating better current alignment through the bend....

Weirs have widely been used for the flow measurement, flow diversion and its control in the open channels. Attempts have been made to study flow over different shapes of normal weirs, side weirs and oblique weirs. This paper is connected with the development of the discharge coefficient measurement. In the present study four different weirs in different height are considered for validation purp...

This thesis investigates the behavior of free-standing gabion walls in areas of mild seismicity. To investigate this behavior, three walls of varying internal cable patterns were constructed at a quarter-scale. These walls were tested with a mass shaker, and mode shapes, tone extractions, and damping ratios were calculated. A modal analysis was conducted using design spectra created from a suit...

A more complete understanding of scour mechanisms for flows downstream grade-control structures, including their temporal evolution, has the potential to lead improved predicting tools design. To date, design equations have been mostly derived empirically, i.e., by parametric modelling (at generally-small scales) corresponding specific structure configurations, and limited ranges hydraulic cond...