ion; depletion; hydropower; river; run-of-river; small-scale; weir.

The effect of the outlet weir height on sieve tray performance is described in this paper. The studies were made to investigate the effect of the outlet weir height on sieve tray mass transfer efficiency and hydraulic performance. Tests were conducted in the 1.22 m diameter section of the Fractionation Research, Inc. (FRI) low-pressure column. Sieve trays with nominal hole areas of 14%, 13%, an...

Skilled pianists were requested to interactively adjust note (i.e., key depression) durations in simple sequences, played under computer control on a digital piano, so as to sound optimally staccato (perception task) and to perform analogous sequences with staccato articulation on the same instrument as well as on a real piano (production task). The independent variables were tempo, register, a...

Independent control of finger movements characterizes skilled motor behaviors such as tool use and musical performance. The purpose of the present study was to identify the effect of movement frequency (tempo) on individuated finger movements in piano playing. Joint motion at the digits was recorded while 5 expert pianists were playing 30 excerpts from musical pieces with different fingering an...

The purpose of this research is examining the performance rectangular broad and sharp crested weirs in terms cavity index discharge coefficient. For purpose, a computational fluid dynamics CFD code FLUENT applied. Firstly, verified by applies on experiments work Hagre et al 1994 results show excellent agreements between Hager 1994. Secondly applied both weirs. demonstrate that have lower coeffi...

This study investigated the perception and production of legato ("connected") articulation in repeatedly ascending and descending tone sequences on a digital piano (Roland RD-250s). Initial measurements of the synthetic tones revealed substantial decay times following key release. High tones decayed faster than low tones, as they did prior to key release, and long tones decayed sooner than shor...

An experimental campaign is undertaken in order to investigate the hydraulic features of a vertical drop shaft, also considering the influence of a venting system consisting of a coaxial vertical pipe, projecting within the drop shaft with different plunging rates. Three different flow regimes are observed: a “weir flow” for very low head values, where the flow profile is subject to the atmosph...

This study presents a spatial analysis of physical and biotic river conditions below a low head hydro scheme in the River Goyt, UK. The overall aim was to assess whether changes in localized hydrological features, introduced by low head hydro, affect phytobenthic biomass. Single point and profile measurements of flow velocity and velocity vectors, elevation, depth and biofilm biomass were mappe...

Abstract Algal bloom has been a persistent problem for both fresh and marine water, with no exception coastal reservoir (CR). Among the algal mitigations CR, shape optimisation to reduce occurrence frequently mentioned. However, there was literature found on actual study or process CR. Thus, this research done bridge gap, particularly second-generation Hydrodynamic model of MIKE 21 used, second...

This article presents the longue durée social history of a medieval fish weir. It reveals significant role fishing and weirs in construction reconstruction structures cultural identities. focuses on an enigmatic annual ceremony – Horngarth or Penny Hedge at Whitby, North Yorkshire. The begins by arguing that descends from intertidal weir, before exploring possible contexts which weir originated...