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Jun 13, 2018 · Discharge is the volume of water moving down a stream or river per unit of time, commonly expressed in cubic feet per second or gallons per day. In general, river discharge is computed by multiplying the area of water in a channel cross section by the average velocity of the water in that cross section: discharge = area x velocity
- Discharge Measurements at Gaging Stations
The techniques and standards for making discharge...
- Streamgaging Basics
A streamgage is a structure installed beside a stream or...
- Discharge Measurements at Gaging Stations
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What is stream discharge?
What is streamflow & discharge?
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Mar 3, 2019 · A streamgage is a structure installed beside a stream or river that contains equipment that measures and records the water level (called gage height or stage) of the stream. Streamflow (also called discharge) is computed from measured water levels using a site-specific relation (called a stage-discharge rating curve) developed from onsite water ...
- What Is Stream Flow and Why Is It Important?
- Task 1 Prepare Before Leaving For The Sampling Site
- Task 2 Select A Stretch of Stream
- Task 3 Calculate The Average Cross-Sectional Area
- Task 4 Measure Travel Time
- Task 5 Calculate Flow
- References
Stream flow, or discharge, is the volume of water that moves over a designated point over a fixed period of time. It is often expressed as cubic feet per second (ft3/sec). The flow of a stream is directly related to the amount of water moving off the watershed into the stream channel. It is affected by weather, increasing during rainstorms and decr...
Refer to section 2.3 - Safety Considerationsfor details on confirming sampling date and time, safety considerations, checking supplies, and checking weather and directions. In addition to the standard sampling equipment and apparel, when measuring and calculating flow, include the following equipment: 1. Ball of heavy-duty string, four stakes, and ...
The stream stretch chosen for the measurement of discharge should be straight (no bends), at least 6 inches deep, and should not contain an area of slow water such as a pool. Unobstructed riffles or runs are ideal. The length that you select will be equal to Lin solving the flow equation. Twenty feet is a standard length used by many programs. Meas...
Cross-sectional area (A in the formula) is the product of stream width multiplied by average water depth. To calculate the average cross-sectional area for the study stream reach, volunteers should determine the cross-sectional area for each transect, add the results together, and then divide by 2 to determine the average cross-sectional area for t...
Volunteers should time with a stopwatch how long it takes for an orange (or some other object) to float from the upstream to the downstream transect. An orange is a good object to use because it has enough buoyancy to float just below the water surface. It is at this position that maximum velocity typically occurs. The volunteer who lets the orange...
Recall that flow can be calculated using the equation: Continuing the example in Fig. 5.6. say the average time of travel for the orange between Transect #1 and #2 is 15 seconds and the stream had a rocky bottom. The calculation of flow would be:
Adopt-A-Stream Foundation. Field Guide: Watershed Inventory and Stream Monitoring Methods,by Tom Murdoch and Martha Cheo. 1996. Everett, WA. Mitchell, M.K., and W. Stapp. Field Manual for Water Quality Monitoring. 5thEdition. Thompson Shore Printers. Missouri Stream Teams. Volunteer Water Quality Monitoring.Missouri Department of Natural Resources,...
Nov 21, 2023 · What is Stream Discharge? Stream discharge is the amount (volume) of water carried by a stream past a point per second. It is measured in meters cubed per second or...
- Stream discharge is measured by multiplying the velocity of water flowing through a channel by its width and depth. Sometimes, the product of veloc...
- River discharge is a volumetric measure of water flowing through the channel of a river past a point in unit time. It is generally expressed in uni...
- An increase in the velocity and cross-sectional area of the water flowing through the stream channel often leads to an increased stream discharge....
- The stream discharge is influenced by various factors, including weather, seasons of the year, water withdrawals, construction of dams, and others....
Stream discharge: What it is and why it matters. Water discharge, also known as flow or discharge rate, is the volume of water passing through a specific point over a fixed period. In open channels like streams, rivers, and ditches, it may also be called surface flow or stream discharge.
In hydrology, discharge is the volumetric flow rate (volume per time, in units of m 3 /h or ft 3 /h) of a stream. It equals the product of average flow velocity (with dimension of length per time, in m/h or ft/h) and the cross-sectional area (in m 2 or ft 2 ). [ 1 ]
Mar 30, 2023 · The United States Geological Survey (USGS) defines streamflow as “the volumetric rate of flow of water (volume per unit time) in an open channel, including any sediment or other solids that may be dissolved or mixed with it that adhere to the Newtonian physics of open-channel hydraulics of water.” 1 Discharge addressed in this document is ...
