SLUICE GATE PHOTOS

FlumeA_F.jpg: Manometer lines sluice gate in the half-meter flume. A close view of where the lines run from the manometers to the channel positions. Lines for taps A-F go from the manometers over the side of the flume just past the sluice gate. The lines for taps 1-22 run under the channel to the tap locations.

OpenChannelManometers2.jpg: Close view of the bottom part of the manometer units. There is no flow in the channel, so the manometers show water level that represents the level at the bottom of the channel. Most manometers show the same level because the no-flow level is constant in the channel. The taps at the right edge are for taps A-F, and show different levels because their lines run over the side of the flume, and the water gets stuck at somewhat random levels. Note the numbering of levels for the graph paper start at zero just a slight distance below the current water level, so “zero” is not exactly at the channel bottom.

SluiceGate2.jpg: Close view of sluice gate from slightly downstream of the gate. The manometer lines run to the taps that go through the sluice gate to give readings for the water on the other side. NB: Since the sluice gatte is pulled up to let flow into the channel, the elevations of the taps can vary during experiments. It is importnat to measure the height of gate opening for each run.

SluiceGateFront.jpg: This is a view of the gate opened very high. The gate is opened by turning the handle on the right end. (Another handle is just out of view on the left end.)

SluiceGateStart.jpg: A group of students is setting the water level to start a run. It sometimes takes two students (on both sides of the gate) to move the gate when the upstream water level is high.

SluiceGateX.tif: A closer view of the gear system used to raise or lower the gate.