Labyrinth weirs are complex hydraulic structures. They have been widely used as a water
regulator and to increase discharge in channels and spillway dams. Labyrinth weirs are an …

Current hydraulic design/analysis literature for labyrinth weirs is limited to headwater ratio
(total upstream head/height of weir) values less than 1.0. This study utilized physical and …

The gate valves described in the article are used to handle the water flow between the
pressure chamber and the other operating parts of the water dam. The opening and closing …

Piano key weirs (PKWs) are nonlinear hydraulic structures that exhibit unsteady hydraulic
phenomena. A study incorporating both physical and numerical modeling was undertaken to …

Nappe oscillation is a phenomenon that can have an undesirable impact to the local
environment (eg, nearby residences, and parks) as the phenomenon has been observed to …

Under relatively low heads, the occurrence of nappe oscillation, also known as nappe
vibration, may be observed on hydraulic structures with a free overfall, such as weirs, crest …

Nappe oscillation and its potentially undesirable impact associated with significant noise
production can be an issue for free-overfall hydraulic structures. Although nappe oscillation …

Scale effects generated in the flow over nonlinear weirs have been studied on a limited
number of occasions. Furthermore, the existing studies have been almost exclusively …

This paper presents a dataset obtained from fifty-two laboratory experiments of nappe
oscillations on free overfall structures. Data were collected on two complementary …

Nappe oscillation may affect a variety of free overflow hydraulic structures operating at low
heads such as crest gates and various types of weirs. This phenomenon produces …