Presentation on theme: "Introduction to Sediment Sampling USGS Technical training in Support of Native American Relations (TESNAR) 2011 Klamath, Warm Springs, Yurok, and Karuk."— Presentation transcript:
Introduction to Sediment Sampling USGS Technical training in Support of Native American Relations (TESNAR) 2011 Klamath, Warm Springs, Yurok, and Karuk Tribes Chiloquin, OR September 19-23, 2011 Design and Function of Suspended-Sediment and Water-Quality Samplers
Sediment-discharge measurements in the United States began in 1838 when Captain Talcott sampled flows in the Mississippi River. In 1843, J.L. Riddle started another sampling program on the Mississippi River, collecting only surface samples that were assumed to represent the full depth In 1851, this assumption was proven false by a study that collected samples at discrete depths. In the late nineteenth century, sediment- sampling activities increased rapidly as Federal agencies organized civil ‑ works programs. For the most part, engineers in charge of these programs developed their own sampling equipment. By the 1930's, agencies had started to develop equipment for use by their agency, but there was little if any consistency in the design of instruments developed by each of the agencies. Questions - - What are some consequences of inaccurate data? What if the inaccuracy is not random, but biased? What of inconsistent data? Why do we need accurate and consistent samplers?
The Federal Interagency Sedimentation Project (FISP) was created in 1939 to unify and standardize the research and development activities of Federal agencies involved in fluvial sediment studies. Focus is to develop, test, and supply physical samplers that collect representative samples. More recently focus is also on indirect, surrogate methods of measurement and analysis. Instrument design, development, qa, supply; and research Question: recall definition of Representative Sample? Federal Interagency Sedimentation Project
To obtain a sample in such a way that the water-sediment mixture moves with no change in velocity as it leaves the ambient flow and enters the sampler intake. Critical step toward collecting a representative sample. Isokinetic Sampling:
The US DH-2 TM The sampler collects at least 1-liter of sample isokinectally to 35 ft. Approximate Length: 20 in., Width: 6 in. Weight: 30 lb FISP
LIMITATIONS Transit Rates & Depth Rigid bottle < 15 ft with D samplers < 180 ft with P samplers < 0.4 times the mean velocity (based on approach angle and pressure equalization) Bag Up to 220 ft 0.4 times the mean velocity (based on approach angle)
Operating Specifications ● Constant Speed ● 12 or 24 Volts ● Speed Setting: 0.1 to 4.5 ft/sec ● Bi-Directional Motor operation ● “B” & “E” Reels w/2 Pulley Sizes High-Torque Reel Drive System
Wireless Remote Control Unit Operating Specifications ● Works Up to >100 ft. Distance ● Will be Backward Compatible to Existing Reel Drive ● Has Many Advantages Over ‘Bluetooth’ Including Security ● No External Antenna Required ● 250k bytes/sec @ 2.4 GHz ● Very Long Battery Life ● Lower Cost Uses ZigBee ™ Wireless Technology High-Torque Reel Drive System
Information from FISP: Mark Landers- FISP Chief E-mail: email@example.com Phone: (770) 903-9152 http://fisp.wes.army.mil
TO ORDER EQUIPMENET (Federal Agencies) USGS Hydrologic Instrumentation Facility Building 2101 Stennis Space Center, MS 39529 (800) 382-0634 ext. 83271 USGS: http://1stop.usgs.gov/onestop/
Non Federal Agencies use the following commercial distributors:
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