#Water concrete flume plus#

For now, we sure appreciate the snow and rain! Posted on JanuAugCategories Accurate, Lasting Devices, Measure It Right, Measure To Manage, Water Rights Tags accurate flow measurement, flow measurement device, flume, Parshall flume, Water Flow Measurement 2 Comments on Flumes – installing for decades of flow measurement, Part 1 Life Of Reilly: If You Can’t Measure It, You Can’t Manage It!Ī friend of mine, Chris Reilly, summarizes everything you need to know about measuring flows into your surface water diversion: “If you can’t measure it, you can’t manage it!” Except for riparian rights and some very small water rights, diverted flows have to be measured. More on the details and how-to’s of flumes later. Usually a new measurement device is installed nearby, and the old flume is not used anymore. The whole floor could be raised by pouring a higher concrete floor, making sure it slopes exactly the way the old floor sloped. Rehabilitating a flume is not impossible, but it is not often done.

The flow computed by using the staff gage depth is about 40% more than actually goes through the flume…so the ranchers who use the water could be shorting themselves.

It shows what can become a common problem: the ditch below has not been kept as deep as it should be, so the flume is “flooded out”.

The photo below is of a flume that has been installed for 30 years.

#Water concrete flume plus#

On the plus side, there are no boards to change, it measures a wide range of flows with good accuracy (+/- 5% in the first 10-15 years of its life), and it will pass debris and gravel through without clogging. It costs 3 or 4 times as much to install. This device could last for 40 years before it becomes too worn to be accurate, or develops cracks that let parts of it settle.įlumes are much more expensive than a weir box with boards. This flume is 3.0′ wide, and will be used to measure diversions of up to about 16 cfs. It took 4 days for a crew of 5 people to make this. The newly-built flume shown below is formed concrete. The kind of flume for measuring flows is a concrete, metal, fiberglass, or wood structure built to exact dimensions. Lumber also brought in enough revenue to make flumes worth it. Flumes were then used to transport cut logs from the mountains down to mills in the valleys. Gold was certainly worth the expense! It takes water to wash gravel over a washboard so gold can settle out in the ribs or slats. In earlyĬalifornia, flumes were used to get water from a stream to gold-bearing gravels where there wasn’t water. These flumes are expensive and time-consuming to build so they have to make economic sense. What is a flume? Most people think of long flumes that carry water across a canyon, or along the edge of a mount ain, to get water through steep country. Reports Of Licensee/… on Do Something Wrong, Instead Of… No Record Of Water R… on Do Something Wrong, Instead Of… Reasoning With Regul… on Use BING or DUCKDUCKGO To Sear…ĭo Something Wrong,… on Measure Any Flow With Watchman…įlow/Volume Data and… on Flow/Volume Data and Data-Head… Converting Logger Pressure to Depth & Storage/Flowsīringing California Farmers and Water Policy Together.Do Something Wrong, Instead Of Nothing Right.Reasoning With Regulators, Benefitting From Bureaucrats.H-S Flumes For Accurate Measurements Of Small Flows.