One cubic foot per second (cfs) is equal to the discharge through a rectangular cross section, 1 foot wide by 1 foot deep, flowing at an average velocity of 1 foot per second. It is also approximately 7.48 gallons per second.
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What is a good flow rate for fly fishing?
You can fish it lower and fish it higher, but optimal, stable flows are normally between 100 and 200 cfs.
What is the best CFS for fly fishing?
700-1000 cfs โ This level is the best of both worlds. There is plenty of water to float and you can wade the river nearly everywhere. At this level look for fish out of the main current.
What does CFS mean for fishing?
CFS- or ‘cubic feet per second’- is a numeric term used to describe the amount of water currently flowing on a particular river.
What is a safe river flow?
On this particular section of river a really good CFS is between 600 to 800, and anything above 6.3 is a decent height.
What is a fast river flow rate?
A moderately fast river flows at about 5 kilometers per hour (3 miles per hour), while fast streams during the floods exceed 25 kilometers per hour (15 miles per hour). One of the easiest ways to determine the surface speed of the river is to use your GPS on your boat, like any other moving vehicle.
What is a high cfs river?
Depending on the waterway’s descent, width and arrangement of the rocks, a higher CFS can usually means you’ll get larger rapids. A river, in the Southwest especially, is considered to have high water levels when the CFS is 3,000 and above. Low water levels are around 200/300 CFS.
What are CFS levels?
CFS stands for Cubic Feet per Second, and it’s a measure of the volume of water passing any given point in a river in one second. One cubic foot of water weighs 62.5 pounds. How much water is in the river? Why does the river level fluctuate so much?
How do you measure CFS?
Cubic feet per second (cfs) 1 cubic foot = 7.4805 gallons. 1 cubic foot per second = 7.4805 gallons flowing by a particular point in 1 second. 1 cfs = 1.983 acre-feet per day = 646,320 gallons = 2447 cubic meters of water. 1 cfs is equivalent to 448.8 gallons of water flowing per minute.
How do you read a water flow chart?
I digress. The blue squiggle at the bottom represents what the river or stream is currently doing. The yellow triangles above represent what the average flow ( in cubic feet a second) is for that day based on how long the gauge has been operating.
How do you read a CFS river?
How does water flow affect fishing?
Decreased stream flow can contribute to direct mortality if fish eggs are exposed, covered with silt, or left without sufficient, oxygenated water. Reduction in usable habitat can result in decreased abundance, size, and condition of fishes.
Can you convert cfs to mph?
To convert a foot per second measurement to a mile per hour measurement, multiply the speed by the conversion ratio. The speed in miles per hour is equal to the feet per second multiplied by 0.681818.
How many gallons are in a cfs?
One cubic-foot per second (or 7.48 gallons per second) is also equal to 448.8 gallons per minute, 1 CFS = miner’s feet.
How many cfs is a garden hose?
A typical garden hose provides about 3 gallons per minute. To put our small stream’s flow in perspective, one cfs is equivalent to 150 garden hoses being sprayed at the same time. comparison with annual household water use.
Do river currents pull you under?
Rivers and streams can appear calm on the surface but there may be: Strong undercurrents that can pull under even a strong and experienced swimmer. Strainers (branches that act like a sieve and keeps people/ boats/ gear from passing through) and blockages such as trees, debris, etc.
What is a fast river discharge?
Higher CFS readings generally mean the river is flowing faster, with a high volume and often rapids. Lower readings mean that the river is generally less full and could mean it may not have enough flow for good paddling.
What is KCFS for river flow?
The rating curve represents the actual flow, in CFS (Cubic Feet Per Second) or KCFS (Thousands of Cubic Feet Per Second) for a particular stage at that river location.
How can you tell how fast a river flows?
Distance (or length) divided by Time equals Rate. Rate is the flow rate or speed of the water, using the unit “meters per second. ” For example: The object travels a 5 meter length of stream in 8 seconds. Divide 5 (length traveled) by 8 (time it took to travel the distance) for an answer of .
What is the average flow rate of a river?
The speed of a river varies from close to 0 m/s to 3.1 m/s (7 mph). Factors that affect the speed of a river include the slope gradient, the roughness of the channel, and tides. Rivers tend to flow from a higher elevation to a lower elevation.
What river has the strongest current?
Current. Saltstraumen has one of the strongest tidal currents in the world. Up to 400 million cubic metres (110 billion US gallons) of seawater forces its way through a 3-kilometre (1.9 mi) long and 150-metre (490 ft) wide strait every six hours.
What cfs is safe to kayak?
From 3,000 to 6,000 cfs you should have very strong paddling skills. Below3,000 cfs is generally calm, and anything below 300 to 500 cfs will be too low for paddling.
What is considered fast moving water?
Rapids are areas of shallow, fast-flowing water in a stream. Rapids tend to form in younger streams, with water flow that is straighter and faster than in older streams. Softer rocks in the streambed erode, or wear away, faster than harder rocks.
How do I calculate flow rate?
- Volumetric flow rate formula: Volumetric flow rate = A ร v. where A – cross-sectional area, v – flow velocity.
- Mass flow rate formula: Mass flow rate = ฯ ร Volumetric flow rate = ฯ ร A ร v. where ฯ โ Fluid density.
How do you measure your flow?
